GEOGRAPHY FORM TWO
HUMAN ACTIVITES
Human
activity refers to something that people do or cause to happen in order to
achieve certain goals . Human activities contribute to climate change by
causing changes in Earth's atmosphere in the amounts of greenhouse gases,
aerosols (small particles), and cloudiness. The largest known contribution
comes from the burning of fossil fuels, which releases carbon dioxide gas to
the atmosphere.
Concept of Human Activities
Meaning of Human Activities
Give the
meaning of human activities
Human activities refer to what people do or cause to happen in
order to achieve certain goals in life.
·
Also human activities can be defined as acts or processes of
production as intended by people in a certain place. Which can be a country,
region, district or a village.
·
Human activities are also referred to as functions or tasks or
work carried out or done by human beings over time for achieving certain
purposes or goals.
Therefore human activities are carried out with certain goals or
purposes; these purposes can either be:
·
Production of food crops.
·
Production of cash crops.
·
Construction of infrastructure that facilitate movement of
goods, services and people; cleaning the area to avoid pollution and outbreak
of diseases like cholera, amoebic dysentery, etc.
·
Human activities use up resources to produce products and
services.
These
activities combine to form business processes.
Major Types of Human Activities
Identify
major types of human activities
Human activities may be classified into four types namely:
1. Primary
activities
2. Secondary
activities
3. Tertiary
activities
4. Quaternary
activities
Primary
activities
Primary activities involve exploitation of nature in the
production of materials. Production in this kind of activities largely depends
on the earth’s natural resources. Examples of primary activities include:
·
Farming (Agriculture)
·
Mining and Quarrying
·
Fishing
·
Forestry (Lumbering)
·
Hunting, gathering and livestock keeping
Most products from primary activities are raw materials for
industrial activities. For example cotton from agriculture is used in textile
industries, timber for paper industries and leather for shoe-making industries.
·
Agricultural activities involve growing and harvesting of crops from farms.
It is an important activity since it contributes to the provision of food and
other raw materials. Some of the crops are used as sources of food, examples:
maize, millet, sorghum, soya, bean and peas.
·
Mining leads to the extraction of minerals like gold, copper, diamond,
platinum and uranium. These materials act as raw materials for the industries.
Some minerals such as coal and uranium are the sources of power, uranium leads
to the production of nuclear energy that is highly demanded all over the world
due to its importance.
·
These materials act as raw materials for the industries.
·
Some minerals such as coal and uranium are the sources of power,
uranium leads to the production of nuclear energy that is highly demanded all
over the world due to its importance.
·
Fishing leads to the supply of food. (Some fish remains are used in
preparation of animal food).
·
Lumbering leads to the production of timber that is very important in construction
and furniture making.
·
Hunting leads to provision of food, decorations and tourism.
·
Livestock farming leads to supply of meat, milk for food and commercial
purposes.
·
Quarrying leads to the supply of stones used for construction of roads,
bridges and foundation of buildings and houses.
Secondary
activities
These are human activities that involve a process of
manufacturing raw materials into useful products.
·
Secondary activities involves processing of raw materials such
as ginning cotton from raw cotton and heating crude rocks to get precious
stones.
·
Other secondary activities include cloth-making, construction of
houses, car assembling, making dyes and making glue.
Secondary
activities are of great importance as they lead to fast economic development
since they produce products that have immediate demands in the society.
They
also accelerate development of primary activities by providing a market for raw
materials produced through lumbering, agriculture and mining.
Tertiary
activities
These
are the activities that involve the provision of services that are needed in
the society.
Examples of tertiary activities include:
1. Trade
(restaurants, hotels, lodges, supermarkets)
2. Schools
(Teachers)
3. Hospitals
(Doctors)
4. Transportation
(Driving)
Others include
plumbing, mechanics, entertainment, water supply, waste management,
advertising, legal services, in court clerical services or religious services.
Quaternary
activities
These are activities that involve provision of intellectual
services and information
·
These activities were formally included in the tertiary
activities.
·
Quaternary activities include high-tech industries with
information technology, scientific research, consultancies and library
services. Computer based activities like making software are part and parcel of
quaternary activities.
·
In general quaternary activities are considered to be new and
started in the last decade.
Quinary
activities
These are activities that are done by top executives or
officials in fields such as governments.
·
They involve the highest level of planning and decision making
in the society or economy.
Quaternary
and quinary activities e.g. research and information are important in the
development of farming, mining, tourism and trade.
Importance
of human activities
Below is the importance of human activities:
1. They
facilitate the development of manufacturing industries by producing raw
materials such as cotton for textile industries.
2. Helps
in creating employment in the country. People are employed in industries and become
managers, technicians, drivers and engineers.
3. Human
activities such as agriculture and fishing lead to production of food.
4. Activities
like construction of roads contribute to the development of transport and
communication networks.
5. Recreation/
activities attract tourists who in turn bring about foreign currency in the
country and facilitate development of the country.
Environmental
problems caused by human activities
1. Air pollution: This can be caused by
Industrial emission, burning of agricultural wastes and grains when cleaning
the land for cultivation and mining.
2. Water pollution:Caused by dumping of
untreated materials into the water bodies. Waste materials may come from
industries, farmyards and tourist centres.
3. Soil pollution: Can be caused by dumping
of radioactive materials on the ground, applying chemicals in the farms,
irrigation using saline (salt) water and acid iron fall in heavily
industrialised areas.
4. Deforestation: This can take place when
trees excessively cleared during preparation of large farms lumbering.
Overgrazing and development of settlements.
5. Soil erosion: This takes place easily
because of cutting of trees for lumbering, construction and establishing
extensive farms.
Measures
for controlling environmental problems caused by human activities
1. Undertaking
agricultural activities using modern methods such as crop rotation, inter
cropping, fallowing strips, contour ridging.
2. Planting
trees where the land is bare and restricting people from cutting down trees
unnecessarily and excessively.
3. Excessive
use of chemicals in the control of pests should also be discouraged.
Accumulation of chemicals in the soil can lead to soil pollution, which can
disrupt the soil structure.
4. Improper
dumping of waste in the soil or water should be discouraged.
5. Population
control should be encouraged so that people can not excessively clear
vegetation for establishing settlement and farms.
TOPIC TWO
AGRICULTURE
Agriculture
refers to a fundamental human activity involving cultivation of crops and
domestication of animals (livestock husbandry). It is categorised as a primary
activity since it involves the production of raw materials that can be used by
other industries.
Agriculture
is the practice of cultivating land, growing crops and rearing animals.
Originally, agriculture was considered to involve cultivation of crops only. In
modern times, it has expanded to include rearing of animals, poultry keeping
andfish farming . Even activities like storage, processing and marketing of
agricultural produce are also regarded as part of agriculture. There are two
types of agriculture: small-scale agriculture and large-scale agriculture.
Small Scale Agriculture
Small-scale
agriculture is the type of agriculture that is practiced on relatively small
plots of land that usually does not exceed four hectors. Small-scale
agriculture is practiced for both subsistence and commercial purposes.
Characteristics of Small Scale Agriculture at Subsistence Level:
Explain
the characteristics of small-scale agriculture at subsistence level
There are two levels in which small scale farmers can operate,
commercial and subsistence level. When farmers produce with a basic focus on
selling, this is typical commercial level but when they operate farms to feed
their families and provide their needs, it is farming for subsistence level.
The following are specific features of small scale agriculture at subsistence
level;
1. Labor
force. Mostly agriculture at subsistence level involves the use of members of
the families; they do not hire extra labor force outside.
2. Mainly
traditional. This has the implication on the use of simple tools like hoes,
animals, pangas to cultivate and few cases they use animals. It goes further to
the use of seeds from the previous harvest.
3. Ways to
improve fertility. There are varieties of ways to improve the fertility such as
the use of organic manure from animals such as goats, cows and sheep, mulching
(covering the top soil with dead crops and animal remains to retain moisture),
various farming techniques like use of crop rotation.
4. Many
crops are grown at once. You can find the farm with mixed crops such as beans,
maize, sunflower and some watermelon.
5. Very
little or no surplus. This is because; the major motive of subsistence
agriculture is consumption.
6. Size of
the land. The land cultivated for subsistence farming is always small; this is
the result of increasing in number of people occupying an area.
7. Little
or no use of technology inform of seeds, manure and tools.
8. Mainly
food crops. The common are maize (African staple food), millet, sunflower,
fruits and vegetables.
The Effects of Rapid Population Growth on Small Scale
Agriculture
Explain
the effects of rapid population growth on small scale agriculture
Continuous
increase in the number of people is a serious problem facing small scale
agriculture because: it reduce the average size of land, results to over
exploitation which lead to reduced soil fertility. In the other side increasing
population has increased amount of labour force in agriculture.
Advantages and Disadvantages of Small Scale Agriculture
Describe
advantages and disadvantages of small-scale agriculture
ADVANTAGES
OF SMALL SCALE AGRICULTURE
Although small scale agriculture is very powerful to reduce
poverty levels, in many cases it has been given less priority. The following
are some of the merits of small scale agriculture.
·
Varieties of crops are grown on a small piece of land. This is
very helpful because, crops such as beans are used to retain soil fertility and
members of family eat healthy and natural balanced diet.
·
Reduction of costs. Because small scale agriculture uses family
members, there is no big burden in the production cost. With regard to the use
of small tools such as hoes and seeds from previous harvest, it makes the
production input cheaper.
·
Growth of trade. Small scale farmers can sell their little
surplus to gain money, it promote the supply and demand chain. Example, you can
find many rice markets at Ifakara district in Morogoro region during the
harvesting season.
·
Care for the crops. I.e the small farms are easy to manage
closely. It becomes very easy to trace the development of crops and to control
pests.
·
Environmental conservation. There is little or no use of
chemicals like inorganic fertilizers; this makes it possible to conserve the
quality of the soil.
·
If it will be improved, small scale agriculture will reduce
poverty and reduce number of people fleeing to urban areas (rural-urban
migration).
DISADVANTAGES
OF SMALL SCALE AGRICULTURE
·
It is rain feed agriculture. Farmers depend on favorable weather
condition, they do not focus on irrigation and when the rain fail or during the
period of heavy storms, it is great loss and people will suffer from hunger.
·
Small harvest caused by poor techniques, poor seeds and small
area.
·
Pest and diseases destroy crops. There is little use of
pesticides, when pests attacks the small areas, the impacts will be huge loss
and hunger.
·
The intensive use of small farms will make them infertile in the
long term.
·
Due to its small size, it is makes it very hard and expensive to
use machines.
Large Scale
Agriculture
Large-
scale agriculture is the farming system which takes place on a large area.
Examples of plantation agriculture include sisal plantation in Morogoro and
Tanga –Tanzania, Tea plantation in Kericho – Kenya, Rubber plantations in
Liberia, Ranching in Australia, Argentina and USA for sheep farming,
Kongwa-Tanzania for beef farming and sheep ranches in South Africa. The types
of systems of large-scale agriculture in the world are categorised according to
land use intensity as follows:
1. Intensive Farming
Name types
of large-scale agriculture in the world
This is
the system of agriculture in which large amount of capital and labour are
applied to a small piece of land including the use of scientific methods of
production so as to get high production. Horticulture is a good example.
2.
Extensive Farming
This system takes place where a large area of land is worked by
a small labour force. This usually requires the use of modern machines. It
takes advantage of economies of scale that produce highly on a large area using
low labour costs. For example tea, sheep farming and coffee. The following are
the characteristics of large-scale agriculture:
1. It
takes place on a large area and the farms are large for example plantations and
ranches.
2. It
involves the use of modern farming equipment like machines.
3. The
farmers are skilled.
4. It
needs a lot of capital for investing.
5. It
needs cheap and efficient transport system from the farms to the market.
6. Production
is mostly for commercial purposes.
7. It is
monoculture in nature.
8. It
involves the use of chemicals.
9. Production
is high.
Major Crops Grown in Each Type of Large Scale Agriculture
List the
major crops grown in each type of large-scale agriculture
Large
scale agricultural production is done mainly for commercial purposes. However,
in intensive farming where the population is high, food crops are grown
together with cash crops. Crops which are grown in large scale include tea,
coffee, cocoa, bananas, sisal, sugarcane, grain and rubber. Large scale
cultivation is very common in Asia, Africa and America.
Characteristics of Large Scale Agriculture
Describe
characteristics of large-scale agriculture
Large
scale agriculture is organized scientifically and involves the cultivation of
large area about 100 to 400 hectares and above. Single type of crop is grown
normal and due to higher cost of establishing and need for sophisticated
technology, farms are owned by big companies and government. The cultivated
large plots are called estates or plantations.
Requirements for Growth, Farm Preparation, Planning, Care,
Harvesting, Processing, Storage and Transport
Describe
the requirements for growth, farm, preparation, planning, care, harvesting,
processing, storage and transport.
The following are the requirements for large-scale farming:
1. There
should be enough capital and reliable supply of skilled labour and unskilled
labour.
2. There
should be a ready market where the produce can be sold and reliable transport
for carrying the crops from the farm to the market and industries.
3. There
should be a large area which is almost a flat land or undulating surface for
easy mechanisation, sparsely populated and efficient management.
4. The
climate should be conducive depending on the nature of the crop to be grown.
5. There
should be reliable storage facilities and efficient processing facilities.
Farm
Preparation
Planting
Care
Given to Crops
The following care must be given once crops are planted:
1. Young
plants should be shaded for four weeks.
2. Mulching
should be done in that newly established estate to avoid excessive soil water
evaporation.
3. Apply
fertilisers containing nitrogen.
4. There
should be weeding and pruning.
Harvesting
of Crops
Tea
Tea harvesting is done in the following ways:
1. Tea
leaves are ready for picking three years after planting. Usually it is after
four years that is when one gets a very good harvest and harvesting goes on for
50 years.
2. Plucking
goes on throughout the year and the leaves are packed and sent to factories for
processing.
Clove
Clove
harvesting takes place just before the flowers open and the buds are picked by
hand. This is done twice a year and harvesting on one clove tree can go on up
to 50 years.
Coffee
Harvesting
coffee may start three years after planting, a very good harvest can start
after four or five years. Coffee-picking is done by hand by removing the ripe
berry from the stalk. The harvesting interval is from 7 to 14 days.
Rubber
Harvesting
of rubber is done through tapping; the trees are ready for tapping after about
seven years. This long maturity time makes it difficult to invest a large
amount of capital which is required to establish rubber plantations.
Major Producing Countries for Respective Crops in the World
Identify
and locate major producing countries for respective crops in the world
Tea
Tea is
grown in Tanzania mainly in Mbeya, Bukoba, Iringa, Kagera and Tanga regions.
Cotton
In
Kenya, cotton is grown in Nyanza district while in Uganda cotton is grown in
the Buganda District.
Sisal
In
Tanzania sisal is mostly grown in Tanga, Kilimanjaro, Arusha, Morogoro, Lindi
and Mtwara regions. Mombasa, Thika, Murang’a, Machakos and Taita Taveta are
areas where sisal is produced in Kenya.
Sugar
Cane
Sugar
cane is grown in small farms and in estates like Kilombero in Tanzania. Sugar
cane is also widely grown in Kenya, America and Australia.
Cocoa
Cocoa
is grown in central America, Ghana, Nigeria, Cote d’ Ivoire (Ivory Coast),
Cameroon and East Indies.
Palm
Palm
originated and is widely grown in West African countries including Nigeria,
Ghana, Cote d‘Ivoire (Ivory Coast) and the Democratic Republic of Congo (DRC).
Clove
Clove
is grown in the West Indies, Tanzania Islands of Zanzibar and Mauritius.
Wheat
The
wheat yields in the world are highest from countries of Western Europe. The
following are leading producers of wheat: Russia, usa, China, India, Canada
France, Turkey, Australia, Pakistani, German, Romania, Itary and Argentina.In
East Africa, Kenya is the leading procedure of wheat followed by Tanzania.
Coffee
Coffee
producing countries include Brazil, Mexico, Colombia,Tanzania, Kenya, Uganda,
Ethiopia, India and Angola.
Rubber
Rubber
is mainly produced in Malaysia, Indonesia, Thailand, India, Sri-Lanka, Nigeria,
Liberia and Vietnam.
Contribution of Produced Crops to the Economy of USA and
Tanzania
Describe
contribution of produced crops to the economy of USA and Tanzania
The following are the major contributions of produced crops to
the economy of USA and Tanzania:
1. It has
stimulated the development of industries. Cash crops provide raw materials for
processing and manufacturing industries for example Mbeyatex in Tanzania.
2. It has
led to the creation of employment opportunities in the country.
3. It has
contributed to the generation of government revenue in the country and capital
development.
4. It has
stimulated external trade and international relations.
5. It has
contributed to the development of transport and communication systems.
6. Encourages
the improvement of living standard of the people in the country.
Explain Problems Facing Large Scale Agriculture (Tanzania and
USA Case Study)
Drawing
example from Tanzania and USA explain problems facing large scale agriculture
The following are the problems facing large- scale agriculture
in Tanzania:
1. Low
capital for investment.
2. Land is
becoming smaller and smaller due to the increase in population and land
degradation
3. There
are frequent tribal conflicts like those in Mara and Morogoro between the
Maasai pastoralists and non-Maasai agriculturalists.
4. There
is poor support from the Government.
5. Climatic
problems like drought and too much rainfall that cause price fluctuation and
especially low prices discourage the farmers.
6. Rural-urban
migration lead to the problem of labour supply.
7. Mismanagement
of funds set for agriculture as well as poor pro-agricultural policies.
Livestock Keeping
Livestock
farming refers to the rearing of animals and birds such as goats, cattle, sheep
and poultry. Livestock farming is segmented into traditional or subsistence
livestock farming and modern or commercial livestock keeping.
How Pastoralism, Sedentary and Commercial Livestock Keeping are
Practised
Describe
how pastoralism, sedentary and commercial livestock keeping are practiced
TRADITIONAL
LIVESTOCK KEEPING
1. Traditional Livestock Keeping
Traditional
livestock keeping is also known as nomadic
herding. This is livestock farming where the livestock are let out in
search of pasture and water. A person who moves from place to place in search
of pasture and water is called a nomad. The system is extensive and subsistence
in nature as farmers keep animals for food and not for sale.
Example 1
Places where nomadic pastoralism takes place
Fulani
tribe in West Africa. Also the Sukuma and Maasai in East Africa who sometimes
move between Kenya and Tanzania.
Characteristics of nomadic pastoralism
Below are the main characteristics of nomadic pastoralism:
·
The cattle are kept for prestige and traditions such as paying
bride price.
·
The breeding process is controlled and depends on the local
breeds.
·
The herds of animals are large in size.
·
Diseases are common because of poor care given to animals.
·
It is not expensive as the production does not involve
investment of large capital.
·
There is no permanent settlement as farmers move constantly with
their animals.
·
Many animals are grazed on the same field.
2. Semi-nomadic or Semi-sedentary Pastoralism
Semi-nomadic
pastoralism is a system whereby a livestock farmer starts settling and begins
growing crops like maize, millet and sorghum (apart from keeping animals). A
livestock farmer can also use some cattle dung as manure for plant growth.
Example: The Sukuma of Tanzania and the Karamajong of Northern Uganda.
3. Sedentary Pastoralism
Sedentary
livestock keeping is the system by which a livestock farmer keeps animals while
settled permanently in one place. He does not move from place to place.
Characteristics of Sedentary Pastoralism
Below are the characteristics of sedentary pastoralism:
·
The method uses more advanced technology than nomadic
technology.
·
The number of animals is not so high but provides high yield.
·
The animals are kept in sheds, can feed using fodder as zero
grazing.
·
There is diseases control since the number of animals is very
low and modern methods are applied in the controlling of diseases.
·
The system can take place where is high population like in towns
and villages for example on the slopes of Kilimanjaro among the Chagga.
COMMERCIAL
LIVESTOCK KEEPING
This is
a system of keeping animals and birds for sale. It can be intensive or
extensive. Examples of commercial livestock farming are beef farming on ranches
and dairy farming.
Extensive Commercial Livestock Farming
This is
a livestock keeping system that takes place on large scale. It involves keeping
a large number of animals on a large stretch of land called a ranch. Animals
kept in a ranch are usually cattle for beef (beef farming), sheep for wool,
mutton/goats for meat and milk production and pigs for pork. Examples of
ranches include beef farming in the pampas of Argentina, USA and Kenya; sheep
ranching in Australia and South Africa. Tanzania ranches include Kongwa in
Dodoma, Kalambo in Rukwa, Mzeri in Kagera, West Kilimanjaro, Dakawa in
Morogoro, Mkwaja and Uvinza in Kigoma etc.
Characteristics of Ranches
The following are characteristics of a ranch:
·
They are usually established on a large area and they are
scientifically managed due to use of high technology.
·
There is little or no migration due to permanent and reliable
food.
·
Animals are kept in large numbers and production is for sale.
·
They involve high capital investment in relation to the labour
required.
·
Usually the type of animals kept are aimed at one type of
produce.
The Benefits and Constraints of Livestock Keeping Practices
Explain
the benefits and constraints of livestock keeping practices
Livestock
keeping is very important because it provide food, lead to growth of
industries, ranching is done in the land which is not conducive for agriculture
which make use of unproductive land and it raise income as individual and as
well a nation. However the practice face limitations such as inadequacy
capital, pests and diseases and low yield breeds which are not adopted to
climatic changes.
Comparison of Livestock Keeping between Australia and Tanzania
Compare
livestock keeping between Australia and Tanzania
LIVESTOCK
KEEPING IN AUSTRALIA
The
Australian continent is found in the Southern part of Africa and the Northern
part of Antarctica. The continent is famously known as the founder of sheep
farming in the world. Sheep are kept for wool or meat. The sheep kept for wool
require dry and cool conditions. The sheep kept for meat need wet conditions
which encourage a great supply of pasture. Sheep also produce products like
skin and milk. Australia has a sheep population of over 135 million. The sheep
farms are very large. A single farm can have up to 50,000 sheep. Australia is
the world’s leading wool producer.
Factors that led to the Development of Sheep Farming in
Australia
Factors that led to the development of sheep farming in
Australia
·
The use of advanced technology like the use of refrigerators
·
Availability of pasture supporting large-scale sheep farming as
it assures reliable supply of pasture
·
Good climate providing reliable rainfall
·
Good soil that supports the growth of grass
·
Reliable water availability due to precipitation
·
Ready market for selling sheep products
·
Good agricultural policies
·
Availability of capital
LIVESTOCK
KEEPING IN TANZANIA
Livestock
production is one of the major agricultural activities in Tanzania. This
contributes to the natural food supply, converts arable land resources into
products suitable for human consumption. Tanzania’s Government provides about
30 per cent of the agricultural commercial ranching in Tanzania, which accounts
for about 2% of the total cattle herd. The national ranching company is
responsible for managing all ranches in the country. Most of the livestock
products are for domestic market. This sub-sector needs to be developed
particularly in the dairy farming and its products, meat processing to meet the
domestic demands and for export market opportunities.
Advantages of Livestock Keeping
Mentioned below are the general advantages of livestock keeping
1. Livestock
keeping can provide manure that is used in gardens and farms.
2. Livestock
keeping increases the living standard of people due to fast economic growth
from animal products.
3. It
ensures the availability of food especially when the animals are so many,
example nomadic pastoralism.
4. Sedentary
livestock keeping encourages environmental conservation as the animals do not
move from one place to another.
5. It
facilitates the development of transport and communication systems, example
farming in Argentina.
Disadvantages of livestock keeping
Disadvantages of livestock keeping include:
1. Livestock
keeping can lead to soil erosion due to movements from place to place for
finding pasture and water. Example: nomadic pastoralism
2. Farmers
do not settle for cultivation but move place to place with their animals for
finding pasture and water in semi-nomadic pastoralism
3. Expensive
in establishing ranches and capital for establishing and maintaining the
project
4. Acceleration
of deforestation as most ranches result from clearing forestry in order to be
established
5. Livestock
lead to environmental pollution example the decomposition of dungs leads to the
emission of methane gas that pollute the air
Conclusion
Livestock
keeping in Tanzania has many benefits; it leads to employment, provision of
food and other animal resources like skin and dairy products. So the government
must provide capital and support to livestock keeping in order to promote
development of the nation.
Livestock Keeping as Practiced in Different Communities in
Tanzania
Describe
livestock keeping as practiced in different communities in Tanzania
Livestock
keeping is activity which is also carried by majority of Tanzanians. Animals
which are kept includes cattle, goats, sheep, poultry, donkeys and
horses.Livestock keeping in Tanzania is carried out more traditional.
Pastoralism as done by Massai, Sukuma and Kwavi, sedentary livestock keeping
among Chaggas and commercial llivestock keeping in highlands and dry areas of
the country.
TOPIC THREE
WATER MANAGEMENT FOR ECONOMIC
DEVELOPMENT
Importance of Water
Water
is perhaps the most important commodity on earth. There can be no life on earth
without water. Therefore, water plays a very crucial role in the very existence
of human beings, other animals and all living things, as well as in their
activities.
Uses and Economic Importance of Water
Explain
uses and economic importance of water
Economic importance and uses of water
1. Water
is used to clean clothes and other fabrics in homes. On commercial basis, it is
used by dry cleaners, capital washing firms and domestic and office cleaning
companies
2. In
manufacturing industries, water is used for various purposes. These include
washing raw materials, washing containers and machines, diluting chemicals or
ingredients as well as a raw material in industries such as in beverages
industries
3. Water
is also put in several uses in the agricultural sector. Among other uses, it is
used to irrigate crops and given to farm animals to drink
4. Water
is a key component of the electricity
5. Water
is used for recreational purposes such as swimming. People pay to use
facilities such as swimming pools, thus generating income for those who run the
facilities
6. Water
facilitates the growth and development of the fishing industry. This is because
water supports the existence of fish in rivers, lakes, ocean or in fish ponds
7. People
who sell water in estates earn income from this activity. Water provision also
generates money for supplying water to homes, offices and industries
The Relationship between Family Size, Water Supply and Quality
of Life
Describe
the relationship between family size, water supply and quality of life
Households
with many family members will obviously require more water to use for various
purposes. If the water supply is so acute as compared to family demand, this
will lead to water scarcity. In such a case, water turns to be a limited
resource. This then affects the quality of life in a various ways such as shortage
of water for drinking, washing, cleaning, cooking, etc.
A large
family requires more water and hence its members have to spend much time,
energy and money to search for and carry water. In rural areas family members,
especially girls and women, spend a lot of time and energy searching for water.
In some communities girl children are stopped from attending to schools in
order to search for water to be used by the whole family. The family may also
be required to spend a lot of money to purchase water from vendors, thus
limiting the family’s expenditure on other goods and services. This badly
affects the quality of life.
For
households with a few members, it is easy to manage water resources to make it
suffice every member in the household. The quality of life will even be better
if that family is well off, in that it can afford to purchase water or even set
up water supply infrastructure for own use. A small family on the4other hand,
does not require very large amounts of water. Because of its low consumption,
such a family is also able to use stored water over a long time in case the
frequency of water supply in that locality is low.
WATER
QUALITY AND SUPPLY
Water
supplied to homes, industries, farms, etc must be of high quality so as to
avoid the problems associated with water of poor quality. It must also be free
of contamination with microorganisms and/or hazardous chemicals.
Contaminants
that may be found in untreated water include microorganisms such as viruses,
protozoa and bacteria; inorganic contaminants such as salts and metals; organic
chemical contaminants from industrial processes and petroleum use; pesticides
and herbicides; and radioactive contaminants. Water quality depends on the
local geology and ecosystem, as well as human uses, such as sewage disposal,
industrial pollution, use of water bodies as a heat sink, and overuse.
Dissolved
minerals may affect suitability of water for a range of industrial and domestic
purposes. The most familiar of these is probably the presence of ions of
calcium and magnesium which interfere with the cleaning action of soap.
Water supply
Water
supply is the provision of water by the government or local authorities,
commercial organisations, community endeavours or by individuals, usually via a
system of pumps and pipes.
Community water supplies
Community water supplies in Tanzania falls into three categories
as explained below:
1. Urban water supply, The
supplier of water to most cities and towns is the local water and sanitation
authority. For example, in Dar es Salaam and Coast Regions, the supplier is the
Dar es Salaam Water and Sewerage Authority (DAWASA), which is a parastatal
organization. Communities which are situated near towns usually get their water
from town water supply. In these communities, the water is pumped from its
source which is usually a dam or bore. The water is treated for possible
contamination and is then stored in large tanks or reservoirs. From these tanks
or reservoirs, a complex system of underground pipes takes the water to the
community's houses, schools, hospitals and other users.
It is the supplier's responsibility to maintain the water supply
equipment. Normally, this will be the water authority. The supplier usually
looks after all pipelines to houses and other buildings. Maintenance and repair
of water structures in the yard or house is the responsibility of the owner of
the house.
1. Rural water supply Most
communities that are situated away from towns get their water supply from a bore.
The bore is sunk in an area where the water is cleanest and most plentiful.
Sometimes, water for a rural community is pumped from a river, pool, lake or
dam.
The rural community’s water supply is a smaller version of a
town water supply. When the water is pumped from the bore it is first treated
to make it clean and free of germs. It is then pumped into a storage tank. From
the storage tank a network of pipes carries the water to the houses, schools,
hospitals, shops, and any other buildings.
3. The elevated tank Community water tanks can be set on high
stands or placed on a nearby hill. The reason is that the elevation (height) of
the tank creates the water pressure at the tap. The higher the tank above the
taps, the greater is the water pressure at the taps. The maximum (greatest)
height for a community water tank is usually 12 metres.
If water pressure at the taps was not created by elevating the
tank, the water from the taps and hoses would dribble out very slowly or no
water would come out at all, for example, it might take an hour to fill a
20-litre bucket or it might be impossible to have a proper shower.
·
Continuity of water
supply Continuity of water supply is not
a problem in most developed countries, but is a severe problem in many developing
countries, where sometimes water is only provided for a few hours every day or
a few days a week. It is estimated that about half of the population of
developing countries receives water on an intermittent basis.
·
The consequences of water
quality and
supply A safe, reliable, affordable, and easily accessible water supply is
essential for good health. An inadequate water supply prevents good sanitation
and hygiene. Consequently, improvements in water supply enhance public health.
An outbreak of diseases like cholera, dysentery, typhoid and diarrhoea often
occur during the time when the water supply is very limited such that adequate
sanitation cannot be achieved.
Water
supply issues have specific adverse effects on women in developing nations such
as Tanzania. Women are often the primary family members responsible for
providing water as well as collecting it. This makes female members of the
community spend most of the time searching for water, thus preventing them from
participating in other economic activities. Sometimes girl children are stopped
from attending schools so as to fetch water for the family.
In
places where the water supply is low, residents have to spend a lot of money on
purchasing it, erecting water infrastructures such as storage tanks as well as
much effort in searching for water. This deprives people of time to participate
in other income-generating activities. Also the money that could otherwise be
spent on other life aspects is directed towards solving water scarcity. This
may lead to abject poverty for those families with low income.
All
these problems indicate that water quality and supply have a lot of negative
implications to the community. So provision of ample and quality water by the
responsible authorities is inevitable.
The Relationship between Vegetation and Water Supply
Explain
the relationship between vegetation and water supply
The availability and quality of water in many regions of the
world are more and more threatened by overuse, misuse and pollution. Both water
availability and quality are strongly influenced by forests. Moreover, climate
change is altering forest’s role in regulating water flows and influencing the
availability of water resources. Therefore, the relationship between forests
and water is a critical issue that must be addressed keenly.
·
Areas with dense forests and other thick vegetation serve as
water catchments. Many rivers and streams have their sources in forests.
Examples of rivers originating from forests are the Congo (Congo forests) and
Mara (Mau forest in Kenya). This water is what feeds streams, rivers and lakes
from which we get water for domestic and industrial uses.
·
Places with abundant vegetation stand a chance of getting
reliable water supply compared to those with little or no vegetation. This due
to the fact that forests form water catchment areas and they also attract
rainfall. Forested lands normally receive high rainfall per year than dry and
bare lands.
·
Governments and international and local organizations encourage
people to plant more trees and conserve natural forests so as to prevent the
occurrence of drought and hence limited water supply to the community. It is
therefore important to ensure that everybody is involved in forest conservation
in one way or another so as to maintain water supply.
·
There is a very close relationship between water supply and
forests. Forests will only thrive on a land that receives sufficient water. At
the same time, places with many thick forests often receive high rainfall.
Therefore, to be sure of adequate water supply, forest conservation is a must.
Where there is little water available, vegetation is very sparse and poor.
How Distance to Water Sources from Household Affects the Girl
Child
Explain
how distance to water sources from household affects the girl child
Lack of
accessible, sufficient, clean and affordable water supply has adverse impacts
specifically related to women in developing nations. In Tanzania, women and
girl children are mainly the ones responsible for fetching water from wells,
rivers, streams, community water supply, etc. The fetching of water, which may
take up to six hours a day to meet the household needs, is a duty often
assigned to women and children. This foregone time often prevents children,
especially girls, from attending school and women from pursuing small business
opportunities.
The
distance between home and the water source affects the girl child in the
following ways:
1. When the distance is long, the girls have to walk
long distances, sometimes in harsh weather conditions such as hot sun, rains
and coldness. Thus, they get tired and sometimes affected health wise by
adverse weather. On the way to and from the water sources, they can also be
attacked by dangerous animals such as lions and hyenas, bitten by poisonous
snakes or even get molested, raped and abused in various ways. Because they
spend much time on the way, this means that they have little time to study,
play or socialize with their contemporaries.
2. If the distance between home and water source is short, the
girl children will take a short time to get the water and have enough time to
play or take part in other activities. So they will not get very tired. Those
studying will have ample time to study and revise or help their parents to do
other activities.
Therefore, it is crucial that the government and local
authorities do whatever it takes to improve the water services so that water
can be obtained from sources close to households. This will reduce or eliminate
all the hardships facing girl children in search of water for their families.
River Basin
Development
River basin development projects are schemes developed for
different purposes, also they are called multipurpose schemes because they are
aimed at meeting many goals like flood control, water supply in the industries
and irrigation schemes. Examples of river basin developments are Rufiji River
Basin Development and Kilombero Basin Development found in Tanzania, others
examples are Tennessee Valley Project in the U.S and the Amazon Basin
Development scheme in Brazil. River basin developments involve processes such
as construction of dams for retaining water, dredging of the river so as to
remove silt and mud from the river.
·
Also clearing of vegetation where economic activities are going
to take place.
·
Planting of trees on the side of the river so as to prevent soil
erosion and check the movement of the surface run-off to prevent flooding.
·
Creating some canals and installing the pipes that should be
used in irrigation schemes.
Benefits of Developing River Basins
State the
benefits of developing river basins
Listed below are the benefits of river basin developments
1. They
help in control of floods where they are established hence the danger of
destruction through flooding is avoided.
2. They
lead to the improvement of navigation in the respective rivers especially when
the dams are constructed.
3. Leads
to the development of the fishing industry especially after the construction of
the dams.
4. Water
is provided for industrial use and domestic purposes.
5. River
projects encourage environmental conservation like the control of soil erosion
by planting trees.
6. Employment
is usually created in the river basin development projects, for example fishing
and workers in the farms get employment.
7. Silt
removed from the river during dredging adds fertility to the soil and hence
promotes farming.
8. Water
is also provided in the irrigation schemes hence leading to the expansion of
farms and increase in agriculture production.
9. They
encourage the development of tourism since the dams are used as recreational
centers, the gorges and waterfalls for viewing and hence bring foreign currency
to the country.
The Organization, Benefits, Problems and Prospects of Rufiji
Basin Development Authority (RUBADA) and Tennessee River Valley Authority
Explain
the organization, benefits, problems faces and prospects of Rufiji Basin
Development Authority (RUBADA) and Tennessee River Valley Authority
1.
Tenessee River Valley Authority (TVA)
Tennessee
river valley is found in the U.S.A and is a tributary of Ohio river. The
government of U.S.A organized the development of the valley with the general
aim of solving economic difficulties of the people.
Benefits of the Tenessee Valley Authority (TVA)
Below are the benefits of the Tennessee Valley Authority:
1. There
has been an increase in water supply for irrigation, domestic use and
industrial use.
2. Navigation
in the Tennessee river has improved such as the commercial freight ships
operating in the river.
3. Hydorelectric
power was made available to many people.
4. The
floods have highly been controlled.
5. The
project has created job opportunities for many people.
6. Increase
on the size of arable land due to soil control.
7. Fishing
industry has developed due to the construction of dams.
8. Provision
of hydroelectric power has led to the development of different manufacturing
and heavy industries.
Problems facing Tennessee River Valley
Listed below are some of the problems facing the Tennessee
Valley:
1. Soil
erosion can also affect the established Tennessee River Valley project.
2. Soil
exhaustion due to intensive farming hence poor farming and low yield.
3. Water
pollution especially by the industries discourages the utilization of water
from the river basins for economic development.
4. Accumulation
of silt in the dams leads to the reduction of the volume of water.
5. The
outbreak of diseases like cholera due to accumulation of water.
6. Unreliable
rainfall and excessive evaporation lead to the drying of the river and other
water bodies hence economic activities cannot take place easily due to the
dryness.
Prospects of the Tennessee River Valley
These are some of the prospects brought by the Tennessee River
Valley
1. Constructing
more dams for retaining water all year round
2. Maintaining
the roads and modifying them to better standards
3. Training
the local people on other economic activities like navigation fishing and not
to rely on one activity to solve the economic problems of the people
2.
Rufiji River Basin Development Authority (RUBADA)
Rufiji
basin development is found in Tanzania, the government of Tanzania organized
the development to support economic activities of the people.
Benefits of Rufiji Basin
Some of the major benefits of RUBADA include:
1. It has
promoted the market for the Hydro Electric Power (HEP) from Kidatu power plant.
2. There
has been flood control.
3. The
scheme has stimulated the development and maintenance of the railway lines and
roads.
4. It has
lead to the creation of employment opportunities in the valley.
5. It has
promoted living standards of people through employment.
6. The
development of towns, for example, new towns like Kidatu, Makambako and Mikumi.
7. The
authority provides expert advice to the farmers on good farming techniques and
solutions to their farming problems.
Problems facing the Rufiji Basin Development
Some of the problems facing the Rufiji Basin Development
include:
1. Poor
labour supply due to rural urban migration.
2. Diseases
like cholera and malaria affect the farmers such that they fail to contribute
effectively in the development of the scheme.
3. The
climate problems like draught have been affecting water availability, sometimes
the volume of water in the river decreases.
4. There
are transport problems prevailing since the roads and bridges are not well
constructed, hence during the wet season the area is not well accessible.
5. Expenses
will be high since the process need high capital and the government does not
have enough capital.
6. Low
technology knowledge among the local people and hence they need intensive
training to get the required knowledge and skills.
7. The
researches and preliminary plans are taking too long. This will lead to the
decline of other small projects because the government is concentrating more on
that big project.
Prospects of Rufiji Basin Development
Some of the prospects of the Rufiji Basin Development include:
1. More
funds have to be solicited from various donors both internally and externally.
2. Private
sector should be encouraged to invest in the development of the valley, thus
good investment climate has to be created in order to attract private
investors.
3. Construction
of more dams for retaining water.
Land Reclamation
The Major Aims for Land Reclamation
Explain
the major aims for land reclamation
Land
reclamation is the process of creating new land from ocean, riverbeds or lake
beds. The main objective is to turn land which was previously unproductive to
be productive, to increase the size of arable land for various uses such as:
human settlement, establishment of industries and expanding agricultural
production.
The Techniques Used in Land Reclamation
Describe
the techniques used in land reclamation
Land
reclamation can be achieved with a number of different methods. The simplest
method involves simply filling the undulating land with large amounts of heavy
rock and/or cement until the desired level is attained. The process is called
"infilling" and the material used to fill the space is generally
called "infill".
Draining
of submerged wetlands is often meant to reclaim land for agricultural use. Deep
cement mixing is used typically in situations in which the material displaced
by either dredging or draining may be contaminated and hence needs to be
contained.
Various techniques are employed in land reclamation. The method
chosen for reclaiming the land depends on the state of the land in question.
The following are some of the techniques that can be used to reclaim the land:
1. Irrigation:Irrigation can be used to reclaim arid and
semi-arid lands. An arid land may contain sufficient plant nutrients only that
these nutrients are not available to plants unless dissolved in water.
Irrigation may be followed by addition of fertiliser if the land does not
contain adequate nutrient elements to sustain plant growth. The irrigation can
be done on a small or large scale depending on the size of the land and the
kind of use into which the land is to be put after reclamation.
2. Afforestation and reforestation: Afforestation
refers to the act of planting trees on a land that has scant or no vegetation.
It is mainly carried out on arid, semi-arid or badly eroded lands. It can also
be done to reclaim a swampy land. In such cases, trees that consume a lot of
water such as eucalyptus are planted so as to drain the land. Reforestation
refers to planting of vegetation on an area whose natural vegetation has become
scant or cleared by man.
A forestation is done for four major reasons, among others:
1. To
create water catchment. As explained early, forests attract rainfall, thus they
act as water catchment.
2. To
prevent soil erosion. In this case, trees protect soil from the impact of
direct rain drops as well as wind, both of which protect the soil from erosion
by water and wind respectively. In addition, trees help to bind the soil
particles firmly so that they are not easily eroded by agents of erosion such
as water, wind and animals.
3. Forests
may be established for the purpose of producing timber or poles for sale or
logs for manufacture of paper.
4. Forests
are known to modify the climate though processes such as evapotranspiration
(release of water vapour from plant leaves into the atmosphere). Forests also
attract rainfall and hence improve the amount of rainfall that a place receives.
Increased rainfall can stimulate crop cultivation and animal husbandry.
Techniques continued
1. Drainage:This technique involves digging trenches or
channels through which water from swampy lands can drain out, thus helping to
dry the land. This makes the land suitable for agriculture or settlement. It
may also be used to reclaim land from the sea or lake. In the Zuider Zee
project in the Netherlands, dykes were built to block sea water. The water in
the enclosure was pumped out using pumps. The land was then rehabilitated by
planting reeds to prevent growth of weeds and to further drain the water. The
reclaimed land was ultimately used for agriculture.
2. Landfill:This refers to the act of levelling the land
by filling soil, vegetation, stones or other material in the holes,
depressions, trenches or undulating land surface to make it suitable for
various uses. Landfill can also involve adding a layer of a fertile soil on top
of a barren or unproductive soil to be used for agricultural production. This
technique of land reclamation is practiced by countries which lie in desert or
arid belts where addition of a fertile soil is followed by irrigation and
fertilisation.
3. Flushing or acidification:Sometimes the soil may
contain excess salts particularly sodium ions. This makes the soil too basic
(saline). To make such a soil fit for agriculture, the salts are flushed by
passing water through it. Alternatively, the salts can be neutralised by
addition of sulphur or sulphuric acid. However, this technique is very expensive.
It should only be practiced when necessary.
4. Clearing vegetation and controlling pests:Some places consist of
dense vegetation covers. Such places often are infested with tsetse flies. One
of the methods of controlling tsetse is through clearing of bushes (their
breeding grounds). Once the bushes have been cleared, the tsetse are ultimately
killed using chemicals or by biological methods. The reclined land can then be
used for crop cultivation, livestock keeping or settlement.
Land Reclamation Process in Tanzania
Explain
land reclamation process in Tanzania
Various
land reclamation efforts have taken place and are still going on in Tanzania. A
number of methods are employed to reclaim wasteland, turning it a useful land.
Some of the land reclamation initiatives in Tanzania include the
following:
1. Irrigation. This is carried out on dry lands found within
the Rufiji basin. Water from river Rufiji and its tributaries are used for this
purpose. Irrigation is also carried out in dry regions of Singida, Dodoma and
Shinyanga.
2. Drainage. The
land in some parts of the country has been reclaimed by using this technique.
For example, parts of Kunduchi and Msasani were reclaimed through drainage in
order to obtain land for settlement and other purposes
3. Afforestation and
reforestation. This is one of the various methods used to reclaim wastelands in
Tanzania. Shinyanga region is the best example of the land reclaimed trough
afforestation. Under the afforestation programme called Hifadhi Ardhi Shinyanga
(HASHI), the government has encouraged planting trees to create forests as well
as planting trees in crop farms (agroforestry).17The land which was formerly
unproductive is now productive again and can be used for agricultural
production, settlement and other economic activities. Also in Kondoa district
the land has been reclaimed through afforestation campaign, among other
techniques.
4. Clearing of vegetation. This was mainly done by colonialists
in miombo woodlands. The vegetation was cleared to get rid of tsetse flies
which affected livestock production. The cleared land was used for livestock
keeping as well as settlement.
Sustainable Use of
Water Resources
The Types of Underground Water and how it can be Tapped for Use
at Local and National Levels in Tanzania
Explain
the types of underground water and how it can be tapped for use at local and
national levels in Tanzania
Water
can be found both on the surface of the earth and underground. Underground
water also called ground water or subterranean water, is the type of water
found below the surface of the earth. Underground water include all water that
is found below the earth’s surface, occupying interstices (pores) or voids of
pervious rocks and soil. Like surface water, it is derived principally from
precipitation that falls upon the earth’s surface and percolates downward under
gravity.
Different Resources Obtained from Water
Differentiate
different resources that are obtained from Water
Underground water is categorised based on its source as follows
1. Connate water: It may also be described
as fossil water. This is water trapped in the pores of the rock during the
formation of the rock. Connate water can change in composition thought the
history of the rock. Connate water is normally saline. Formation water or interstitial
water, in contrast, is simply water found in the pore spaces of rock and might
not have been present when the rock was formed. This type of water can be found
in desert rocks where rainfall does not occur for a long period of time.
Connate water generally plays an insignificant role in ground water
studies.Agroforestry as practised in Shinyanga region
2. Meteoric water:This refers to
underground water which originates from rainfall and other forms of
precipitation such as hailstorms and snowfall. When the rainfalls or snow
melts, a considerable portion of this water gradually infiltrates into the
ground. This infiltrating water continues its downward journey to the zone of
saturation to become part of the ground water in aquifers (water–bearing
rocks).
3. Juvenile water:Juvenile water, also
described as magnetic water, is water that exists within magma. It is brought
close to the earth during vulcanicity. Magnetic water rises from great depth
accompanying the magma flow from down the earth’s crust.
4. Oceanic water:This is underground water
that results from the seepage of ocean water into the ground. It is common in
coastal areas where ocean water seeps horizontally into the ground from the
ocean.
Underground
water can be tapped and put into various uses. The water tapped from the ground
can be used for domestic and industrial purposes. Domestic uses include
cooking, washing, bathing, watering plants, cleaning and many other uses.
Industrial uses may include cooling of machinery, dissolution and dilution of
chemicals, beverage manufacture, etc.
Underground water can be tapped in a number of ways which
include the following:
1. Drilling boreholes:These are holes dug deep
into the ground to reach the water table. When the water table or underground
water is reached, the water seeps up through the hole under pressure. It is
then brought above the ground by pumping manually or using a water pump.
2. Digging wells:Just like boreholes, a
hole is dug into the ground until water is reached. The difference between
boreholes and wells is that water from the well is mainly drawn mechanically
using containers such as buckets that are raised mechanically or by use of simple
pulleys or hand. The walls of wells may be lined with bricks or stones and
cement.
3. 3.
Where the water occurs very close to the surface, the soil may be scooped to
expose the water. The water may then be scooped using cups or other containers.
It may be directed to farms for irrigation via channels or trenches. The water
may also be pumped and channelled into pipes to provide tap water.
4. Underground
water may be naturally exposed to form springs or oases in deserts. This water
may be scooped directly using containers. It may also be directed to farms
through channels.
ways to tap underground water
Methods Used for Extracting Resources from Water
Describe
methods used for extracting resources from water
Resources
obtained from water
There are a number of resources that can be obtained from water.
Outlined below are some of the resources that can be extracted from water:
1. Fish and other edible creatures, such as crabs and prawns: These resources may be caught either for sale or family
consumption.
2. Building materials: The
building materials obtained from water include sand, coral rock, gravel and
clay. Sand can be obtained from beaches of seas or lakes or river valleys and
rocks are collected from the sea shore. The rocks and gravel are a result of
erosion of the coastal rock by sea waves. Clay can also be obtained from the
sea floor or river bed.
3. Electricity: Marine wind is used to turn windmills to
generate electricity. Hydroelectric power is also a resource from the water
since it results from the running water which is used to turn turbines to
generate electricity.
4. Saltwhich is used at home and in industries, is mainly obtained from
sea water though it can also be extracted from salty rivers and
lakes.Brick-lined well20
5. Ornamental items such as
cowrie shells, snail shells, lobster shells, etc are also water resourcessince
they come from animals that inhabit water.
6. Sea weed is used in many maritime countries as a source of food, for
industrial applications and as a fertiliser. High utilisation of these plants
as food is in Asia, particularly Japan, Korea andChina, where sea weeds
cultivation has become a major industry.
7. Limestone and gypsum: Limestone
forms from shells of dead marine organisms ranging from molluscs to corals and
plants. Limestone can be used directly or converted into cement for
construction purposes. Gypsum forms during evaporation of sea water and thus
may occur with limestone. The gypsum deposits are mined and generally converted
into Plaster of Paris which is mainly used as a building material.
Extraction
of resources from water
Many
resources are extracted from water and used by man. The following are the means
by which thenamed resources may be extracted from the water:
Fish
and other edible marine creatures
Fish may be obtained from water through use of a hook and line,
nets, herbs, spears or traps. In thecase of a hook and line, bait (such as worm
or meat) is attached to a hook which is joined to a stringtied to a long stick
or rod. The hook is sunk into the water. When the fish bites the bait, it gets
caughtby the hook and pulled out. This method is used for small-scale fishing.
Another
method of catching fish is through use of certain plants called tephrosia. This
plant ispoisonous to fish. When the leaves of this pea plant are pound and
mixed with water, the fish arepoisoned and they fall unconscious and float on
water. They are then picked from the water by hand oruse of a spear
(harpooning). The fisherman spears fish in water and it is attached to the tip
of the spearfrom which it is detached and put in a container.
The traps are mainly used where there are floods or at the coast
where there are tides. These traps areset up at the bank of the river or on the
beaches. The fish are washed into the banks or beaches by thewater. As the
water receded the fish remain trapped behind the traps.
Nets
are used to catch a large number of fish. With nets the fish are enclosed in a
net with smallperforations through which fish cannot penetrate. They are then
hurled to the sea shore, removed fromthe net and put in containers.
Sand
Sand is extracted from the beaches or dredged from the ocean or
river beds. This can be done by usingscooping machinery or by hand using
shovels, pans, hoes, etc. It is then loaded onto truck or lorryusing shovels or
a grab dredge.
Salt
The process of extraction of salt from water involves
evaporation. The salty water is trapped inevaporation ponds. The sun evaporates
the water. As the water vapourizes, the salt remains behind.Eventually, enough
of the water evaporates to leave behind a layer of salt crystals that can
becollected, dried and stored in bags.Another alternative for salt extraction
from the water is by means of evaporation tanks. Salty water ispumped into the
tanks where the water is evaporated, leaving the salt behind.
Hydrolectricity
·
Hydroelectric power is generated by using turbines that are
turned by the fast-flowing river water,where the kinetic energy of the water is
transformed into electrical energy.
·
Tidal power or marine wind is used to turn windmills to generate
electricity. The kinetic energy ofwind is converted into electrical energy by
windmills (wind turbines).
Ornamental
items
These
can be obtained from the sea or lake by picking them using hands. This is
normally done duringlow tide and after the water has receded. Ornamental items
are brought to the shore from deep sea bythe tides or sea waves.
Seaweeds
are harvested by hand-picking. The weeds occur naturally or they can be
planted. Limestoneand gypsum are mined by quarrying.
The Problems Caused by Extraction of Water Resources
Explain
the problems caused by extraction of water resources
Extraction
of water resources may cause various problems and disturbance to ecosystem.
Below are some of these problems:
1. 1. Overfishing, and indiscriminate
fishing whereby even very young fish are caught reduces theavailability of fish
resources in water. It also causes an imbalance in the ecosystem.
2. Water pollution is a
problem where dynamites or poisons are used as methods of fishing.Dynamites
produce loud sounds which disturb the fish and other aquatic organisms while
poisonkills fish, aquatic plants, and other marine organisms.
3. Sand harvesting may
lead to loss of media for growth of plant life. It may also disturb aquatic
life,for example, it may interfere with breeding of some marine organisms such
as monitor lizards,Salt evaporation ponds23snakes, crocodiles, alligators and
turtles. These animals normally lay eggs in the sand. Sand extraction from
river banks may also lead to flooding since the sand deposited besides a river
acts as a levee which prevents water from leaving its channel during floods. It
may also accelerate river erosion because the extraction process loosens the
soil and makes it easy to erode.
4. Harnessing hydroelectric power from
river water requires dams to be constructed. This can cause water shortage to
the areas downstream. Water trickling from the tank to the nearby areas may
also lead to flourishing of disease vectors such as mosquitoes and snails which
harbour causative agents for malaria and schistosomiasis respectively.
Some of the solutions to these problems include the following:-
1. Giving
guidelines on the kind of nets allowed for fishing certain fish species. To
achieve this, the fishermen must be closely monitored to ensure that holes of
the nets they use for fishing are not too small to catch even young fish.
2. Restricting
fishing in some parts of the water, especially those areas identified as fish
breeding grounds, so as to allow fish to breed and increase in number.
3. Encouraging
and educating people to practice fish farming so as to reduce fishing pressure
on natural water bodies such as rivers, lakes and seas.
4. Restricting
or controlling sand harvesting in beaches and shores so as to ensure that
aquatic environment is not destroyed and that aquatic life is not disturbed.
5. Banning
the use of dynamites or poisons in fishing because this act pollutes the water
and is likely to harm fish consumers.
6. Taking
stern actions against those people breaching environmental conservation laws.
The actions may include fines, jail sentences or both.
Water
pollution
Water
pollution is the introduction of substances that lower the quality of water
bodies such as oceans, rivers, lakes, aquifers and ground water. This makes the
water unsafe for use in homes and industries. Water pollution also affects
living organisms (plants and animals) living in water.
Water pollution is caused by some or a combination of many
factors. The following are some of the major causes of water pollution:
·
Agricultural chemicals; Agricultural chemicals that are applied to crops and animals
drip onto the soil and may eventually run off into the local streams and
rivers. They can also seep down to reach ground water. These chemicals
contaminate the water and make it unwholesome for human use and can drastically
affect the aquatic life.
·
Oil spills; Oil spills in oceans and seas cause water pollution and big
problems for local wildlife, fishermen and aquatic organisms. Oil spilled onto
land is also carried into water bodies by surface run off. This includes drips
of oil, fuel and fluid from motor vehicles, oil spilled onto the ground at
filling stations; and drips of oil from industrial machinery. These sources and
many more combine together to form continual petroleum pollution to all of the
world’s waters.
Mining
Mining causes pollution in a number of ways. They include the
following:
1. The
mining process exposes heavy metals and sulphur compounds that were previously
locked deep in the earth. Rain water leaches these compounds out of the exposed
earth, resulting in “acid mine drainage” and heavy metal pollution that can
continue long after the mining operations have practically ceased.
2. The
action of rain water on piles of mining waste (tailings) transfers harmful
chemicals to freshwater supplies.
3. In gold
mining, cyanide is intentionally poured on piles of mined rock (a leach heap)
to chemically extract the gold from the ore. Some of the cyanide ultimately
finds its way into nearby water.
4. Huge
pools of mining waste slurry (semi-liquid mixture) are often stored behind
containment dams. If a dam leaks or bursts, water pollution is likely to take
place.
5. Mining
companies in developing countries sometimes dump mining waste directly into
rivers or other water bodies as a method of disposal.
Other pollutants:
·
Sediment:The act
of clearing the forests to get ample land for agriculture, settlement or wood,
leaves the land bare and exposed to the agents of denudation. This accelerates
soil erosion and the sediment is free to run into nearby streams, rivers and
lakes. The increased amount of sediment running off the land into nearby water
bodies seriously affects the fish and other aquatic life. Poor farming
practices and cultivation along and close to the rivers, exposes the soil to
erosion agents. Soil erosion causes water pollution.
·
Industrial Chemicals:Most of
the water that is used in the production process in industries is eventually
discharged into water bodies. This waste water may contain harmful chemicals
such as acids, alkalis, salts, toxic chemicals, oil, heavy metals and even
harmful bacteria, and other reagents. These substances affect the quality of
water and the lives of aquatic organisms.
·
In some cases, the waste water discharged into a water body may
be hot enough to kill any organism living in that water.
·
Sewage:In
developing countries, about 90% of untreated sewage is discharged directly into
rivers and streams. This renders the water unwholesome for domestic and other
uses. Untreated sewage harbours a myriad of disease-causing organisms. This is
the reason why diseases such as cholera, dysentery, typhoid and bilharzias are
very common among African countries. Leaking septic tanks and other sources of
sewage can contaminate ground and stream waters as well.
·
Marine debris: (marine litter) Marine debris is trash in the ocean. This is
litter that ends up in ocean, seas or other large water bodies. The debris
mainly comes from urban sewers and garbage thrown overboard from ships and
boats. Examples of marine debris include plastic bags, water bottles, balloons,
shoes, lags etc. It can also include items that wash in from the ocean, such as
fishing line, ropes, nets and traps, and items from ship such as lost cargo
from container ships.
·
Heat:Heat is
a water pollutant. Increase in water temperature results in deaths of many
aquatic organisms. This is because, as water temperature increases, the amount
of oxygen that can dissolve in it also decreases. Therefore, warm and shallow
water will contain very little oxygen to an extent that the dissolved gas will
not sustain aquatic life.
·
This increase in temperature is most often caused by discharge
of cooling water (which is always hot) by factories and power plants.
·
Global warming also contributes significantly to heating of the
oceans.
For resources to be sustainable, they must be conserved to
ensure continuity and availability to upcoming generations. Water, as a
resource, can be conserved thought the following ways:
1. Avoiding wastage:All people should use
water wisely to minimise wastage. All taps should be turned off when they are
not used. The used water may be re-used again. For example, water that has been
used to rinse clothes can be re-used to mob the floor, soak the dirtiest
clothes, rags etc. Do not use water directly from the tap, instead fetch the
water in a container and use it wisely.
2. Controlling polluting: People
should neither throw wastes carelessly nor introduce any chemicals into water.
Stern laws should be made and enforced to stop industries from dumping toxic
wastes into the water bodies. Any industry found polluting the water by any
means should be heavily punished or even closed down altogether.
3. Protection of water catchment:Vegetation
in water catchment areas should be protected and cared for. People should not
carry out agricultural activities close to water sources. Planting of trees
that consume a lot of water, such as eucalyptus, near water sources or rivers
should also be avoided. Any activity that destroys the water catchment should
be banned. In the past, the government ordered people to cut down all
eucalyptus trees planted close to water sources so as to prevent the water
sources from drying up.
4. Education:People should be educated
about the importance of conserving the water resources. This education can be
conveyed thought mass media and introducing water conservation courses in
schools and colleges. The government and other organizations concerned with
conservation of water resources should involve local communities so as to get
maximum cooperation in their endeavours. The local people must be involved at
all levels and should be given freedom to suggest how best these resources can
be conserved.
5. Sewage treatment:Sewage is water
containing waste matter produced by people. Much industrial sewage contains
harmful chemicals and other waste materials. Sewage must be treated before it
flows from sewerage systems into lakes, rivers, and other bodies of water.
Untreated sewage contaminates the water and, in time, can kill fish and aquatic
plants. The sewage makes the water unsafe to drink and can also prevent use of
the water for swimming, fishing, and other recreation. Most cities and towns
have at least one sewage treatment plant. In most rural areas, homeowners must
provide their own sewage treatment. Most do so with large underground
containers called septic tanks or pit latrines.
6. Controlled use of agrochemicals:Farmers
should be educated on the correct use of agrochemicals. Also agricultural
activities should not be carried out in areas close to water bodies. The use of
organic manures and chemicals in place of harmful industrial chemicals for
agricultural production should be emphasised.
7. Recycling of products:People should be advised
to recycle the waste instead of dumping it in water sources. This will help
reduce the problem of water pollution.8. Immediate clean upWhen oil is accidentally
spilled in water it should cleaned up immediately before causing any harm to
aquatic life or people using that water. This can be done by use of chemicals
or special machines called skimmer ships.
Water Pollution
Many resources are extracted from water and used by man. The
following are the means by which thenamed resources may be extracted from the
water:
·
Fish and other edible marine creatures
Fish may be obtained from water through use of a hook and line,
nets, herbs, spears or traps. In thecase of a hook and line, bait (such as worm
or meat) is attached to a hook which is joined to a stringtied to a long stick
or rod. The hook is sunk into the water. When the fish bites the bait, it gets
caughtby the hook and pulled out. This method is used for small-scale fishing.
Pollution
Define
pollution
Water pollution is caused by some or a combination of many
factors. The following are some of the major causes of water pollution:
·
Agricultural chemicals:Agricultural
chemicals that are applied to crops and animals drip onto the soil and may
eventually run off into the local streams and rivers. They can also seep down
to reach ground water. These chemicals contaminate the water and make it
unwholesome for human use and can drastically affect the aquatic life.
·
Oil spills:Oil
spills in oceans and seas cause water pollution and big problems for local
wildlife, fishermen and aquatic organisms. Oil spilled onto land is also
carried into water bodies by surface run off. This includes drips of oil, fuel
and fluid from motor vehicles, oil spilled onto the ground at filling stations;
and drips of oil from industrial machinery.
·
These sources and many more combine together to form continual
petroleum pollution to all of the world’s waters.
Mining
·
Mining causes pollution in a number of ways. They include the
following:
·
The mining process exposes heavy metals and sulphur compounds
that were previously locked deep in the earth.
·
Rain water leaches these compounds out of the exposed earth,
resulting in “acid mine drainage” and heavy metal pollution that can continue
long after the mining operations have practically ceased.
·
The action of rain water on piles of mining waste (tailings)
transfers harmful chemicals to freshwater supplies.
·
In gold mining, cyanide is intentionally poured on piles of
mined rock (a leach heap) to chemically extract the gold from the ore. Some of
the cyanide ultimately finds its way into nearby water.
·
Huge pools of mining waste slurry (semi-liquid mixture) are often
stored behind containment dams. If a dam leaks or bursts, water pollution is
likely to take place.
·
Mining companies in developing countries sometimes dump mining
waste directly into rivers or other water bodies as a method of disposal.
·
Sediment:The act
of clearing the forests to get ample land for agriculture, settlement or wood,
leaves the land bare and exposed to the agents of denudation. This accelerates
soil erosion and the sediment is free to run into nearby streams, rivers and
lakes. The increased amount of sediment running off the land into nearby water
bodies seriously affects the fish and other aquatic life. Poor farming
practices and cultivation along and close to the rivers, exposes the soil to
erosion agents. Soil erosion causes water pollution.
·
Industrial chemicals: Most of the water that is used in the production process in
industries is eventually discharged into water bodies. This waste water may
contain harmful chemicals such as acids, alkalis, salts, toxic chemicals, oil,
heavy metals and even harmful bacteria, and other reagents. These substances
affect the quality of water and the lives of aquatic organisms. In some cases,
the waste water discharged into a water body may be hot enough to kill any
organism living in that water.
·
Sewage:In developing
countries, about 90% of untreated sewage is discharged directly into rivers and
streams. This renders the water unwholesome for domestic and other uses.
Untreated sewage harbours a myriad of disease-causing organisms. This is the
reason why diseases such as cholera, dysentery, typhoid and bilharzias are very
common among African countries. Leaking septic tanks and other sources of
sewage can contaminate ground and stream waters as well.
·
Marine debris: (marine litter) Marine debris is trash in the ocean. This is
litter that ends up in ocean, seas or other large water bodies. The debris
mainly comes from urban sewers and garbage thrown overboard from ships and
boats. Examples of marine debris include plastic bags, water bottles, balloons,
shoes, lags etc. It can also include items that wash in from the ocean, such as
fishing line, ropes, nets and traps, and items from ship such as lost cargo
from container ships.
·
Heat:Heat is
a water pollutant. Increase in water temperature results in deaths of many aquatic
organisms. This is because, as water temperature increases, the amount of
oxygen that can dissolve in it also decreases. Therefore, warm and shallow
water will contain very little oxygen to an extent that the dissolved gas will
not sustain aquatic life.
·
This increase in temperature is most often caused by discharge
of cooling water (which is always hot) by factories and power plants.
·
Global warming also contributes significantly to heating of the
oceans.
The Main Sources of Water Pollution
Differentiate
the main sources of water pollution
There
are two major sources of water pollution which are direct and indirect sources.
Direct sources includes effluent from factories, refiners and domestic sewage
which affect directly water supply systems. Indirect sources include pollution
from runoffs, ground water and contaminated rain water. There are other sources
such as oil spills and marine or river dumping of waste.
Ways of Conserving Water Resources
Describe
various ways of conserving water resources
For resources to be sustainable, they must be conserved to
ensure continuity and availability to upcoming generations. Water, as a
resource, can be conserved thought the following ways:
1. Avoiding wastage:All people should use
water wisely to minimise wastage. All taps should be turned off when they are
not used. The used water may be re-used again. For example, water that has been
used to rinse clothes can be re-used to mob the floor, soak the dirtiest
clothes, rags etc. Do not use water directly from the tap, instead fetch the
water in a container and use it wisely.
2. Controlling polluting:People should neither
throw wastes carelessly nor introduce any chemicals into water. Stern laws
should be made and enforced to stop industries from dumping toxic wastes into
the water bodies. Any industry found polluting the water by any means should be
heavily punished or even closed down altogether.
3. Protection of water catchment:Vegetation in water
catchment areas should be protected and cared for. People should not carry out
agricultural activities close to water sources. Planting of trees that consume
a lot of water, such as eucalyptus, near water sources or rivers should also be
avoided. Any activity that destroys the water catchment should be banned. In
the past, the government ordered people to cut down all eucalyptus trees
planted close to water sources so as to prevent the water sources from drying
up.
4. Education:People should be educated
about the importance of conserving the water resources. This education can be
conveyed thought mass media and introducing water conservation courses in
schools and colleges. The government and other organisations concerned with
conservation of water resources should involve local communities so as to get
maximum cooperation in their endeavours. The local people must be involved at
all levels and should be given freedom to suggest how best these resources can
be conserved.
5. Sewage treatment:Sewage is water
containing waste matter produced by people. Much industrial sewage contains
harmful chemicals and other waste materials. Sewage must be treated before it
flows from sewerage systems into lakes, rivers, and other bodies of water.
Untreated sewage contaminates the water and, in time, can kill fish and aquatic
plants. The sewage makes the water unsafe to drink and can also prevent use of
the water for swimming, fishing, and other recreation.26Most cities and towns
have at least one sewage treatment plant. In most rural areas, homeowners must
provide their own sewage treatment. Most do so with large underground
containers called septic tanks or pit latrines.
6. Controlled use of agro-chemicals:Farmers
should be educated on the correct use of agrochemicals. Also agricultural
activities should not be carried out in areas close to water bodies. The use of
organic manures and chemicals in place of harmful industrial chemicals for
agricultural production should be emphasised.
7. Recycling of products:People should be advised
to recycle the waste instead of dumping it in water sources. This will help
reduce the problem of water pollution.
8. Immediate clean up:When oil is accidentally
spilled in water it should cleaned up immediately before causing any harm to aquatic
life or people using that water. This can be done by use of chemicals or
special machines called skimmer ships.
SUSTAINABLE USE OF FOREST RESOURCES
Types of Forestry Resources
Types of Forests
Identify
types of forests
A
forest is a dense growth of trees, plants and undergrowth covering a large area
of land.There are two broad types of forests: Natural forests and planted
(artificial) forests. Natural forests develop naturally without intervention of
man while planted forests are planted and cared for by man.
Natural
forests
Some characteristics of natural forests include the following:
1. Trees
of different types grow together.
2. Most of
the trees are hardwood.
3. The
trees in these forests are indigenous to the area.
4. There
is dense or thick undergrowth.
A natural
forest
Distribution of Forests by Type
Locate the
distribution of forests by type
Due to factors such as climate and tree species, natural forests
can further be subdivided into the following broad categories.
·
Tropical rainforests: They are found around the equator, between 23.5°N and 23.5°S.
Trees in the tropical rainforests are tall and often take a very long time to
mature. They consist of indigenous trees which are typically broad-leaved, and
they contain thick undergrowths of shrubs and other vegetation.
·
Temperate forests: These forests occur in the mid latitudes of both hemispheres.
There are four distinct seasons in temperate deciduous forests and
precipitation falls throughout the year, as rain in the spring, summer and fall
and snow in the winter. The forest floor in temperate forests supports mosses,
ferns and wild flowers. Maple, oak and birch trees are some examples of the
deciduous trees that dominate these forests. There are also small numbers of evergreen
trees such as pines and fir.
·
Coniferous forests: Coniferous forests are typically found in coastal areas with
mild winters and heavy rainfall or in in-land mountainous areas with mild
climates with temperature that fluctuates little throughout the year. Evergreen
conifers dominate these forests. They are characterized by evergreen,
need-leaved trees, with little undergrowth and tall trees which take very long
time to mature. Dominant tree species found in coniferous forests include
cedar, cypress, Douglas fir, pine, spruce and redwood. Some deciduous trees
such as maple, and mosses and ferns are common in coniferous forests.
·
Boreal (taiga) forests: These are the northernmost forest type and are found between
50°N and 60°N. Boreal forests are characterized by long winters and short
summers. Most precipitation is in the form of snow. Trees are mostly evergreen
and include species such as spruce, fir and pine.
Distribution
of natural forests
Planted
forests
Some characteristics of plant forests include.
·
Trees are mainly of one species
·
Trees are planted in rows in order to make harvesting work easy.
·
Trees are may or may not be indigenous to the area
·
Most of the trees are softwood.
A planted
forest
Factors for Distribution of Forests
Explain factors
for distribution of forests
Forest distributions are affected by a number of factors which
include the following:
1. Soil: Different
types of soil offer various types of vegetation. For example, a damp and marshy
soil will favour growth of types of trees such as mangroves, which are
generally found on the coastal areas of the tropics or subtropics. On the other
hand, sandy soils located in dry desert areas will support prickly bushes and
cactus where the aim of the plant is to conserve water.
2. Rainfall: Water
is an essential component of all living organisms. Trees need water for various
physiological functions such as photosynthesis and cooling. Hence, it is
essential for growth and development of any particular vegetation. Forests
thrive well in areas that receive sufficient rainfall which is evenly
distributed throughout the year.
3. Temperature: The
warm and wet equatorial climate supports the growth of mainly huge, tall,
deciduous trees. The cooler temperate climate supports needle-leaved trees
which are adapted to that particular climate. The moderately hot tropical
climate supports a variety of softwood and hardwood trees which thrive best in
the tropics.
4. Relief: Relief
refers to variation in altitude in an area. Differences in altitude along the
slope of a mountain bring about differences in the type of forests along a
mountain slope. For example, you will always find dense forests on the foot of
Mount Kilimanjaro. As you move up from the foot of the mountain, the vegetation
type and density changes gradually. At a height ranging between 1800 and 2800
m, there is the tropical rainforest, followed by the temperate forest at around
4000 m. Between 3000 and 3500 m, the forest is dominated by scanty vegetation,
with patches of a bamboo forest.
5. Aspect: In
physical geography, aspect generally refers to the horizontal direction to
which a mountain slope faces. The slope of a mountain facing the direction of
prevailing winds (windward side) will always receive higher amounts of rainfall
than the slope facing the opposite side (leeward side). For this reason, dense
forests will always grow on the windward side, due to abundant rainfall, while
the leeward side will consist of scanty and poor vegetation.
6. Drainage:If the soil has too much water, plants cannot
get enough oxygen from the soil. This will affect root respiration and the
plants may eventually die. On the other hand, plants cannot grow well if they
do not have healthy roots for absorbing water from the soil. So, the proper
balance of plant health, water and air is necessary for maximum plant growth
and development.Well drained soils support growth of a variety of big trees
compared to water-logged and swampy lowland. However, few plants such as
mangrove can thrive in shallow sea shores which are more or less permanently
covered by water.
7. Human activities:Human activities such as
clearing the vegetation to get land for agriculture or settlement greatly
affect the distribution of forests. Most of the natural forests of the world
have been cleared by man. In some parts man has planted forests (artificial
forests) on bare lands or in place of natural forests.
Importance of
Forestry Resources
The Importance and Values of Forests in Social and Economic Life
Describe
the importance and values of forests in social and economic life
Forests
play an important role in our daily lives. A variety goods and services that we
use to simplify our lives are derived from forests. It is not possible to sum
up the importance of forests in a few words. Forests impact our lives in so
many ways. They are of great social and ecological significance to mankind.
The following are some of the reasons why forests are very
important:
·
Forests are of immense economic importance to us. For example,
plantation forests provide humans with timber and wood, which is exported and
used in all parts of the world. Timber is used in building and construction,
making furniture, tool handles and for ship building, among other various
uses.Trees also provide tourism income to inhabitants (people living in or
close to forests) when people pay a visit to see the beauty of nature
(ecotourism).
Timber
·
Forest trees are valuable sources of wood and charcoal which are
used as fuel in many parts of the world. In many developing countries, Tanzania
inclusive, more than 80% of total energy (fuel wood and charcoal) consumed by
people and industry is derived from forests.
Charcoal
·
Wood pulp which is used to make paper is derived from a variety
of softwood trees.
The Importance of Forests in Ecological and Environmental
Balance
Explain
the importance of forests in ecological and environmental balance
The following are the importance ofForests in Ecological and
Environmental Balance
1. Forests
serve as habitats to a diversity of animal species and they also serve as
settlements for many different wild tribes. Certain tribes such as the Hadzabe
and Tindiga in Tanzania live and earn their living in forests. They live by
gathering fruits from the forests, hunting wild animals for meat, and harvesting
honey. They get all their daily needs from the forests.
2. Forests
protect the watersheds (water catchments). Many rivers and streams have their
sources indense forests. This is because of the heavy rainfall often
experienced in these areas. So forestsserve as sources of rivers and springs,
the water resources that are needed by man for livelihood.The Amazon is by far
the largest watershed and largest river system in the world occupying over
6million square kilometres. Over two-thirds of all the fresh water found on
Earth is in the AmazonBasin's rivers, streams, and tributaries.
3. Forests
help in maintaining the water cycle. When the rain falls some of the water is
absorbed byplants in the soil through roots. The water absorbed by trees is
then released into the atmospherethrough plant leaves (transpiration) where it
condenses to form a mass of tiny water droplets(clouds). After these water
droplets have gained enough size and weight, they fall down as rainunder the
influence of gravitational pull.
4. A
variety of chemical substances are obtained from the forest trees. The barks of
mangrove treesthat are common along the coast of East and West Africa provide
tannin which is used for tanningleather. Chicle, a milky sap obtained from the
bark of the zapote tree from the tropical rainforest ofCentral America is a raw
material used for making chewing gum. Wild rubber and balata juicesused for
making machinery belting are also obtained from tropical forests.
5. Forests
play the most important role in environmental conservation. Trees give out
moisture via transpiration, a phenomenon which increases the atmospheric
moisture content and hence rainfall. The air in and around forests is cold for
most of the time, thereby providing a pleasant micro–climate. Acer saccharum
(Sugar maple) is best known for being the primary source of maple sForest trees
also serve as wind breaks, thus helping to reduce soil erosion by wind. Trees
also prevent soil erosion by providing a soil cover that offers protection to
the soil against the impact of direct rain drops. In this way, they both
protect the soil from water erosion and loss of water via evaporation of
moisture from the soil.
6. Climate
control and atmospheric purification is crucial for human existence. Trees and
soils help regulate atmospheric temperatures through a process called
evapotranspiration. This helps to stabilize the climate. Additionally, they
enrich the atmosphere by absorbing bad gases (for example, carbon dioxide and
other greenhouse gases) and producing oxygen. Trees also help to remove air
pollutants.
Important Areas of
Forest Products, their Transport and Use in the World
Important Countries in Timber Production
Identify
important countries in timber production
Because
forests exist in almost every country, they are equally exploited for their
products. Many countries produce, use and export a variety of forest products.
The following are the world’s leading countries in production of forest
products.
Product |
Leading
countries |
Timber and wood fuel |
Russia, USA, Brazil,
China, Canada, Indonesia, Japan, Sweden, Nigeria, France, Finland, Germany |
Timber from
hardwoods |
Indonesia, Brazil,
India, China, USA, Russia, Nigeria, Tanzania, Malaysia, Philippines |
Timber from
softwoods |
Russia, USA, Canada,
China, Sweden, Finland, Brazil, Germany, Japan |
Wood pulp |
USA, Canada, Russia,
Japan, Sweden, Finland, France, Germany, China, Brazil, Norway, New Zealand. |
Newsprint |
Canada, USA, Japan,
Russia, Sweden, China, Finland, Germany, Norway, UK |
Rubber and gum |
Brazil, Nigeria,
Borneo (Indonesia) Central America |
Resin, pith, tar,
turpentine |
Southern USA,
France, Russia |
Cork |
USA (California)
Portugal, Spain Morocco |
There are many forest products which include the following:
·
Tannin, which is obtained from the hemlock tree of North America
and Europe, oak and chestnut of the temperate hardwoods, quebracho of Southern
Brazil, Paraguay and Northern Argentina, wattle tress of East, Central and
South Africa and mangrove from the tropical coastlands.
·
Palm and creeper products, such as:(i) palm oil; (ii) coconuts;
(iii) mat and basket weaving materials from many varieties of palms such as
pandamus and raffia; and (iv) furniture, basketry and weaving materials from
bamboo and creepers like rattan.
·
Medicinal materials, such as:(i) quinine from cinchona tree;(ii)
cocaine from coca plant; and(iii) camphor from the camphor tree.
·
Fruits and spices
The Means of Transportation and Problems of Timber
Transportation in the World
Explain
the means of transportation and problems of timber transportation in the world
Harvesting
and transportation of timber faces many challenges in many ways. The movement
of logs and timber from the forests to sawmills or market faces many
challenges.
The
logs are pulled by tractors or lorries out of dense forests to saw mills or
markets. Where sawmills are located far away from the forests, they are loaded
and transported to sawmills by lorries. The sawn timber is then transported to
local markets for sale or exported overseas.
In
Tanzania, timber and logs are transported by lorries from production areas
(mostly Iringa, Mbeya, Mtwara, lindi and Ruvuma regions) to Dar es Salaam where
they are sold or shipped to overseas markets.
Within
the tropics, the major problem is moving logs from deep in the heart of the
forest to the mills. The areas where valuable trees are found are undeveloped,
impenetrable, and remote and they often lack access roads. The valuable tree
species are also scattered within the forests. This means covering large areas
of the forest harvesting the desired tree species, a situation which makes
transportation of logs very difficult. Many tropical trees have big trunks and
are heavy. This makes it impossible to transport them by floating on rivers.
Bad enough, some rivers that could be used to transport the logs are
interrupted with waterfalls and rapids, and are covered with dense floating
vegetations such as water hyacinth.
Timber
transportation in temperate forests is much easier. The tree species grow in
pure stands. This means that one area is covered by one species of trees all of
which are almost of the same age. The tree trunks are smaller and lighter than
their tropical counterparts. So the logs can easily be floated downstream to
the saw mills which are located along rivers. In comparison to tropical
forests, transportation problems are minimal. The logs are pulled along the
partly frozen ground in winter by tractors and caterpillars onto the rivers.
Also, there is little undergrowth in the forests. So transportation is not
hindered as it is the case in the tropical forests.
Problems Associated
with Forestry Resources Harvesting
The Problems Facing Forestry Resources Harvesting
Describe
the problems facing forestry resources harvesting
Over the last fifty years about half the world’s original forest
cover has been lost. The most notorious cause for this loss is unsystematic use
of forest resources by man. When we take away the forest it is not just the
trees that go. The entire ecosystem begins to fall apart with dire consequences
for all of us. The following are some of the problems (effects) associated with
harvesting of forest resources:
1. Cutting
down trees indiscriminately exposes the soil to agents of erosion. If
corrective measures are not taken in time, the soil may get eroded badly to
such an extent that it can turn into badlands or even semi-arid.
2. Many
forests form water catchments. Clearing the forests from such places can lead
to destruction of water sources, a fact which can cause drought and hence water
shortage and eventually aridity.
3. Cutting
down trees carelessly, without taking actions to replant the new ones, can
eventually lead to change in climatic conditions leading to drought and famine.
It also deprives the animals of the habitat.
4. Trees
also help to absorb carbon dioxide gas from the atmosphere. So reduction of the
forest cover through deforestation can cause accumulation of carbon dioxide in
the atmosphere and result in greenhouse effect, which causes global warming.
5. Uncontrolled
harvesting of forest resources eventually leads to scarcity of forest
resources. This may, in turn, lead extinction of some forest species.
6. Forests
are a habitat to a variety of animal species ranging from crawling insects to
flying birds; and extremely small organisms to very big animals. Uncontrolled
tree harvesting interferes with the ecological balance of the forest flora and
fauna. In time, some of the animals migrate to other regions where the habitat
is unfavourable or die leading to species extinction.
7. Some
tree species are very rare and unique to the region. If tree harvesting is not
done with care, some of the rare plant species would become extinct, a fact
that would negatively affect the ecosystem balance.
Ways to Address Problems Facing Forests in the World
Describe
ways to address problems facing forests in the world
The problems facing forests in the world can be addressed
through sound management and conservation of forest resources. There are a
number of measures that be taken effectively to manage forests, which include
the following:
1. Carrying
out researches to determine the growth requirement of certain tree species so
that correct species are planted in the correct soil and climatic conditions
for optimum growth. This can also involve the development of tree species that
withstand harsh conditions and which take a short time to mature.
2. Educating
the people on the importance of conserving forests and how the destruction of
the forest cover can have negative impacts on their livelihood. This can be
done via mass media, posters, seminars and introduction of forest conservation
education in school and college curricula.
3. Encouraging
the use of alternative energy sources instead of relying heavily on charcoal
and firewood as the major sources of fuel for homes and industries. The
alternative and clean energy sources include solar power, hydroelectric power,
wind energy, biomass energy (biogas), oil kerosene and natural gas.
4. Encouraging
the use of energy–efficient devices which consume a little amount of energy
examples of these devices include energy–serving bulbs and stoves which can be
purchased from local shops. Use of devices that consume less energy not only
help to conserve energy but also lowers electricity bills.
5. Enacting
and enforcing laws that govern conservation of forest resources. This can
involve setting rules and guidelines about selective felling of trees, that is,
rare species such as the mninga should only be harvested after getting a permit
from forest officer.
6. Where
new forests are established, trees should be planted in blocks. Planting should
be done in phases such that trees in different blocks mature and are harvested
at different periods. When trees in a given block mature, they are cut down and
the new ones are planted to replace them. This will ensure continuity in supply
of timber as well as conserving the soil. The forestry department should supply
seed and or seedling to people to encourage them to plant more trees. Also
people should be encouraged to plant indigenous tree species so that the trees
do not become extinct.
7. The
forestry department should be very keen in detection and control of pests and
diseases that attack the planted and natural forests to ensure constant supply
of timber and other forest resources.
8. Planting
trees where other trees have been cut down (reforestation) and planting trees
where there never existed any tree before (afforestation). People should be
encourage to take part in tree planting through campaigns such as “Kata Panda
Mti”, a campaign aiming at planting trees to replace those cut down. The
forestry department should provide seedlings and seeds to people and everybody
must participate to plant trees on the Environment Day (1st April each year), a
day which is celebrated in Tanzania by planting trees countrywide.
9. The
government should enact and enforce laws in order to manage forests and protect
them against destruction. This may be done by setting aside some forests and
declaring them as protected areas. Anyone caught harvesting trees from the
protected forests should be heavily fined, jailed or both. Forest guards should
be deployed to patrol the forests.
10. Population
control should be encouraged in the countries to reduce pressure on the forest
resources and the land in general. The ever growing human population is
becoming a threat to forest resources as people’s requirement of timber,
firewood and other forest resources is in on the increase.
Forest conservation involves the following measures:
1. Afforestation. This is
the planting of new trees in areas where trees never existed before. Arid and
semi arid regions should be planted with trees to control soil erosion.
Countries like Israel have managed to make the desert land productive by
planting trees.
2. Reforestation. This
refers to planting of trees in an area previously occupied by a forest but
which has been cleared off. This will help to replace the trees that have been
cut so as to conserve the soil and the environment in general.
3. Involving
the local communities in forest conservation is very crucial. This will make
them support forest conservation initiatives. People may be allowed to plant
crops in areas close to forests and at the same time serve as guards who take
care of the forests. This practice has two benefits: helping to clean the
forests and preventing illegal forest resource harvesters.Farmers should be
encouraged to plant trees along with crop cultivation (agroforestry). It is
important to note that measures that aim at management of forests are also the
measures that aim at forest conservation, such as legislation and creation of
forest reserves (protected areas).
Afforestation
SUSTAINABLE MINING
Mining
is the process of extracting valuable minerals or other geological materials
from the earth. Sustainable mining refers to controlled extraction of minerals
such that the minerals do not run out so fast and by ensuring mining activities
do not cause environmental pollution. In geology, a mineral can be defined as
"an element or chemical compound that is normally crystalline and that has
been formed as a result of geological processes." Therefore, a mineral is
a solid matter having a crystalline atomic or molecular structure. It is a
homogeneous, naturally occurring substance with a clearly defined chemical
composition.
Types of Mining Industries
Different Types of Mining Industries
Name
different types of mining industries
The mining industry can be divided into two main types, namely:
1. Metal
mining industry; and
2. Non-metal
mining industry.
Metal
mining industry
This
industry involves the mining of metallic minerals such as gold, manganese,
aluminium, etc. It can be further subdivided into more categories of the mining
industry. For example, we have the gold mining industry, the copper mining
industry, and the aluminium mining industry.
Non-metal
mining industry
This
industry involves the mining of non-metallic minerals such as salt, phosphate,
potash, nitrates, sulphur, diamond, mineral oil, coal, natural gas, limestone,
etc. It can also be subdivided into several categories such as the salt mining
industry, the coal industry, and the oil mining industry, among others.
Types and
Distribution of Mining Regions in the World
Major Types of Minerals Found in the World
Explain
major types of minerals found in the world
So far
over 4600 minerals have been found and every year new ones are discovered. Only
100 of these are common, while the rest are either encountered occasionally, or
are very rare. With such a large number of minerals, it is difficult to
identify and classify them separately. However, mineralogists identify minerals
based on a number of characteristics which include streak, lustre, sheen,
hardness, cleavage, crystal system, colour, specific gravity, clarity or
transparency.
All
minerals are formed from one or more of eight main elements. These are: oxygen,
silicon, potassium, sodium, calcium, magnesium, iron and aluminium. Minerals
are divided into two broad groups, based on their composition, as either
silicate or no-silicate minerals.
Silicate
Minerals
The
most commonly found group of minerals in the Earth's crust is the silicate
group. Almost all silicate minerals have silicon and oxygen as their basic
units. Most silicate minerals are formed by the cooling of molten rocks. As the
molten rocks come closer to the surface inside the Earth's crust, they start
cooling very fast and combine with the most abundant element in the Earth's
crust–silicon. Silicate minerals constitute approximately 90% of the Earth's
crust. Mica, quartz, amazonite, olivine, and biotite are some examples of
silicate minerals.
Examples
of silicate minerals are as shown in the table below.
Mineral |
Chemical
formula |
Type
of rocks that they are commonly found within |
How
People Use Them |
Olivine |
(Mg, Fe)2SiO4 |
Ultramafic igneous
rocks |
A gemstone! |
Pyroxene group |
(Mg, Fe)SiO2 |
Basaltic igneous
rocks |
- |
Amphibole group
(example: hornblende) |
(Ca2Mg5)Si8O22(OH)2 |
Andesitic igneous
rocks |
- |
Micas |
Biotite: K(Mg, Fe)3Si3O10(OH)2 Muscovite: KAl3Si3O10(OH)2 |
Andesitic igneous
rocks |
Colonial Americans
used sheets of mica as window glass. |
Feldspars |
Orthoclase: KAlSi3O8Plagioclase:
(Ca, Na)AlSi3O8 |
Granitic igneous
rocks |
Important for making
ceramics and glass |
Quartz |
SiO2 |
Granitic igneous
rocks |
Quartz is the raw
material for glass and helps clocks keep time. |
Non-silicate
Minerals
There
is a complete range of non-silicate minerals. Some of these are formed when
there is cooling of magma, while others are formed when water in them
evaporates, or due to mineral decomposition. The non-silicates can be further
classified into different groups which are:
Native elements: Many pure elements that
are found with a distinct mineral structure and occur naturally in an
uncombined form fall under this category. For example, uncombined carbon is
often found in its pure state in the form of graphite or more rarely as
diamond. Gold, silver, and sulphur are other elements, which are also found in
their pure state. Even though these are pure elements, they qualify to be known
as minerals, but no further chemical process is required on them.
Sulphides: This
class of minerals have sulphide (S2−) as their basic unit. These inorganic
compounds are sometimes as economically important as other ores. Some examples
include Nickeline (NiAs), Pyrite (FeS2) and Molybdenite (MoS2).
Oxides: When an
ore is found in which one or more elements are combined with oxygen, it is an
oxide mineral. These may have chemical formulas of the type XO (MgO, ZnO, CuO,
etc.), X2O (Cu2O), X2O3 (Al2O3, Fe2O3), XO2 (MnO2, SnO2) and XY2O4 (MgAl2O4,
FeCr2O4). The oxide minerals are mostly of metallic elements. Example:
haematite, magnetite, and cuprite. Silicates and oxides are the most common
types of minerals in volcanoes, especially after an eruption.
Carbonates: This
particular type is formed when a single carbonate ion (CO32-) reacts with a metal
ion of complementing polarity. Example: siderite (FeCO3), smithsonite (ZnCO3),
calcite (CaCO3). Carbonate minerals are used in making cement and other bonding
material.
Sulfates: The
mineral class which includes the sulphate ion (SO42-) within its molecular
structure is categorized as a sulphate mineral. Minerals like Gypsum
(CaSO4·2H2O) and Barite (BaSO4) are examples of sulphate minerals.
Organic Minerals: This
class of minerals includes biogenic substances, genesis, or origin of which can
be attributed to a geological process. Organic minerals include all types of
oxalates, mellitates, citrates, cyanates, acetates, formates, hydrocarbons, etc
Apart
from these, there are many more non-silicate minerals, like nitrates,
sulphides, phosphates, etc., but most of the 4,000-odd listed minerals are
grouped in the above categories. Make sure you do not get confused between
minerals and rocks. A rock is a combination of a number of minerals, which may
also include organic remains and mineraloids, i.e., non-crystalline minerals
Specific examples of non-silicate minerals are shown in the
table below.
Common
Non-silicate Mineral Groups
Mineral
Group |
Example
of Mineral |
How
People Use Them |
Oxides |
Hematite (Fe2O3)
(Magnetite is another type of oxide!) |
Ore of iron |
Sulphides |
Pyrite (FeS2) |
An ore of iron. Also
known as fool’s gold. |
Sulphates |
Gypsum (CaSO4 (+2H2O)) |
Used to make plaster |
Halides |
Halite (NaCl) |
Table salt |
Carbonates |
Calcite (CaCO3) |
Used to make cement |
Native Elements |
Sulphur (S) |
An ingredient of
drugs and chemicals |
Mining Regions in the World Map and the Type of Minerals
Extracted
Locate
mining regions in the world map and the type of minerals extracted
A world map showing distribution of major minerals
Coal
Throughout
history, coal has been used as an energy resource, primarily burned for the
production of electricity or heat. It is also used for industrial purposes such
as refining of metals. Coal is the largest source of energy for the generation
of electricity worldwide, as well as the largest worldwide source of carbon
dioxide release into the atmosphere.
Coal is today used to heat furnaces, for domestic heating and
for the generation of thermal electricity.China is the largest producer of coal
in the world. The USA contains the world’s largest coal reserves, followed by
Pakistan, Russia, China and India. China and the USA are also among the largest
consumers of coal.
World coal
production and consumption
In USA,
the states with largest coal reserves are, in descending order, Wyoming, West
Virginia, Illinois, and Montana. The largest single mine in USA is the North
Antelope Rachele, which produces over 100 million tones coal annually.
The
Ruhr coalfield in Germany is one of the largest coal reserves. In Tanzania,
there are coal deposits at Mchuchuma (Njombe region) and Kiwira (Mbeya region).
Petroleum
Petroleum
is mainly used as fuel to power machines such as vehicles. It is also used as a
source of heat and heating. Petroleum occurs as crude oil which is then refined
to obtain fractions with varied uses. These fractions include diesel, petrol,
paraffin (kerosene), jet fuel and lubricants.
Some of
the leading petroleum producers are Saudi Arabia, Russia, Iran, Iraq, Nigeria,
United Arab Emirates, Angola, Venezuela, Kuwait and Libya.
In
Saudi Arabia the oilfields are located in such areas as Abqaiq, Ghawar,
Khurais, Qatif, Safaniya and Shaybah. In Nigeria, oil wells are found in the
Niger Delta.
Diamond
Diamond
is the hardest and most coveted of all the precious stones. Due to its extreme
hardness, it is used to make glass cutters, drilling devices, rock borers, and
as an abrasive for smoothing very hard materials. Polished diamond is used to
make jewellery such as necklaces, rings and bracelets.
The
major world producers of diamond include Russia, Botswana, DRC, Australia,
South Africa, Canada, Angola, Namibia, Ghana and Brazil. In Tanzania, diamond
is mined at Mwadui in Shinyanga region.
Copper
Copper
is a major metal and an essential element used by man. It is found in ore
deposits around the world. It is also the oldest metal known to man and was
used many years ago.Today, the functions of copper have expanded to include
heating, cooling and refrigeration, electrical wiring, generation and
transmission of electrical power, automotive applications, and many more.Some
of the major copper-producing countries in the world are Chile, USA, Peru,
China, Australia and Zambia.
In
Zambia, copper is mined at Kitwe and Konkola. Zambia is internationally
recognised as a major producer of copper and cobalt. It is ranked the word’s
seventh producer of copper and the word’s second-largest producer of cobalt
after the DRC.
Gold
Gold is
the most popular and well known mineral, known for its value and special
properties since the earliest time. Gold has its use in jewellery, electronics
and computers, dentistry and medicine, aerospace, and medals and awards. Some
of the leading producers of gold in the word are China, Australia, USA, Russia,
South Africa and Ghana.
Tanzania
has become one of the fastest-emerging gold producers in Africa, and is now the
continent’s third largest producer after South Africa and Ghana. Of late there
are nine gold mines in Tanzania namely, Bulyanhulu, Buckreef, Geita, Golden
Pride, Golden Ridge, North Mara, Tulawaka and Kitongo.
Iron
ores
Iron
ores are rocks and minerals from which metallic iron can be economically
extracted. The ores are usually rich in iron oxides. The iron itself is found
in the magnetite (72.4% iron), haematite (69.9% iron), goethite, (62.9% iron),
siderite (48.2% iron) and limonite ores.
Ores
carrying very high quantities of iron, haematite or magnetite (greater than 60%
iron) are knows as “natural ores”.The leading iron producers in the world are
China, Australia, Brazil, India, Russia, Ukraine, South Africa and USA.
Bauxite
Bauxite,
an aluminium ore, is the world’s main source of aluminium. The ore contains
about 98% of aluminium oxide.
Australia
is the top producer of bauxite with almost one-third of the world’s production,
followed by China, Brazil, Indonesia, India, Guinea and Jamaica. Although
aluminium demand is rapidly increasing, known reserves of its bauxite ore are
sufficient to meet the worldwide demands for aluminium for many centuries.
Methods of Mining
Various Ways of Mining
Categories
of various ways of mining
Mining
methods have drastically transformed over many years. Technological advances
have seen improvement in efficiency, safety and health of miners. Also the impacts
of mining operations to the environment have been greatly minimized.
To gain
access to mineral deposits within an area, it is often necessary to mine
through or remove the waste material (overburden) which is not of immediate
interest to the miner. The total movement of ore and waste constitutes the
mining process.
There
are several methods of mining which depend on the type of a mineral and whether
the mineral is located close or deep in the earth’s crust.
The
following are the main mining methods:
Surface
mining
This is done by removing (stripping) surface vegetation, dirt,
and if necessary, layers of bed rock in order to reach buried ore deposits.
Techniques of surface mining include the following:
·
Open pit mining:This is
method is also knows as opencast mining or open cut mining. It involves extracting
rock or minerals from an open pit or burrow.
·
Quarrying:This is
the process which involves excavating stone, rock, construction aggregate,
riprap, sand, gravel or slate from the ground. Continuous excavation of these
minerals from the earth results to an open pit called a quarry.Note: A quarry is the same thing as an open pit mine from which
minerals are excavated. The only trivial difference between the two is that
open pit mines that produce building materials and stones are commonly referred
to as quarries.
·
Stripping:This
consists of removing surface layers off to reveal ores or seams underneath.
·
Mountaintop removal:This
technique, commonly associated with coal mining involves taking the top of a mountain
off to reach ore deposits at depth.
·
Landfill mining:A
process whereby solid wastes which have previously been land-filled are
excavated and processed.
Mountaintop
Removal Mining
Underground
(sub-surface) mining
Underground
mining consist of digging tunnels or shafts into the earth to reach buried
deposits. The ore, for processing, and waste rock, for disposal, are brought to
the surface through the tunnels and shafts. Techniques of underground mining
include the following:
Drift mining – This technique utilizes horizontal access tunnels. Sometimes
the mineral occurs in the side of a hill or valley. In such cases, a horizontal
or nearly horizontal tunnel is dug into the side of a hill or valley until the
mineral is reached. This horizontal tunnel is called an adit. The audit serves
as an entrance to an underground mine by which the mine can be entered, drained
of water, ventilated and mineral extracted.
Horse
level Adit in the abandoned lead mine, Nenthead, County Durham, UK
If the
mineral is petroleum or natural gas, the deposit is reached by sinking wells.
Pumping or own pressure brings the gas or petroleum to the surface.
Other
minerals are extracted by digging shafts to reach the mineral-containing layer.
Hot water is then pumped in to dissolve the mineral and the mixture is pumped
out. The water is ultimately evaporated, leaving the mineral behind. Sulphur is
one of the minerals extracted by this method.
Slope mining: This technique, unlike
drift mining, uses diagonally-slopping access shafts (tunnels).
Shaft mining: This one utilises
vertical access shafts.
Alluvial
or placer mining
Placer
mining is the mining of alluvial deposits for minerals. This may be done by
open pit (open-cast) mining or other means. The placer mining is frequently
used for precious metal deposits (particularly gold) and gemstones, both of
which are often found in alluvial deposits (deposits of sand and gravel in
stream beds or glacial deposits). Since gems and heavy metals, like gold, are
denser than sand, they tend to accumulate at the base of placer deposits.
The
placer mining technique involves digging out the alluvial deposit from the
river bed, mixing it with water, and then swirling (rotating) the mixture
around with water in a shallow pan. During swirling, the pan is tilted in such
a way that the lighter sand or gravel is washed over the side, leaving Horse
level Adit in the abandoned lead mine, Nenthead, County Durham, UK the heavier
mineral at the bottom of the pan. This technique is used in gold mining by
small scale gold miners in Tanzania and South Africa.
Ways of Processing Different Types of Minerals
Explain
ways of processing different types of minerals
Once
the mineral ore has been excavated from the ground it has to be treated in
various ways to separate the required mineral from the waste material and
impurities. The process of treating crude ores and mineral products in order to
separate the valuable minerals from the waste rock or gangue is called mineral
processing.
Depending
on the chemical composition of the ore, mineral processing can involve the
following general operations:
Comminution
Comminution
is particle size reduction of materials. Comminution may be carried out on
either dry materials or slurries. Crushing and grinding are the two primary
comminution processes. Crushing is normally carried out on the raw ore, while
grinding (normally carried out after crushing) may be conducted on dry or
slurried material.
Sizing
Sizing
is the general term for separation of particles according to their size. The
simplest sizing process is screening, or passing the particles to be sized
through a screen or number of screens. The screening equipment can include
various types of screens or wire mesh. Screens can be static (typically the
case for very coarse material), or they can incorporate mechanisms to shake or
vibrate the screen.
Concentration
In
chemistry, concentration is defined as the number of moles of a solute in a
volume of the solution. In case of mineral processing, concentration means the
increase of the percentage of the valuable mineral in the concentrate (mixture
of gangue and valuable mineral). There are a number of ways to increase the
concentration of the wanted minerals, which include:
Gravity
concentration
Gravity
separation is the separation of two or more minerals of different specific
gravity by their relative movement in response to the force of gravity and one
or more other forces (such as centrifugal forces, magnetic forces, buoyant
forces), one of which is resistance to motion (drag force) by a viscous medium
such as heavy media, water or, less commonly, air.
Gravity
separation is one of the oldest techniques in mineral processing but has seen a
decline in its use since the introduction of methods like flotation,
classification, magnetic separation and leaching.
Froth
flotation
Froth
flotation is an important concentration process. The froth flotation is used
with sulphide ores (e.g. CuS or ZnS). The ore is powdered, fed into water tanks
and made into slurry with water. Then “frothing” chemicals (suitable oils) are
added. Sulphides are attracted to these chemicals. When air is blown through
the slurry, froth rises to the top of the tank carrying the metal sulphides
with it. Then they are skimmed off and dried. The gangue sinks.
Electrostatic
separation
This
kind of concentration process involves passing a stream of particles past a
charged anode plate. The particles that are conductors lose electrons to the
plate and are pulled away from the other particles due to the induced attraction
to the anode and are removed from the mixture. For efficient separation to
occur the particles must be extremely small (between 75 and 250 micron), the
particles need to be dry, have a close size distribution and uniform in shape.
Of these considerations, one of the most important is the water content of the
particles. This is important as a layer of moisture on the particles will
render the non-conductors as conductors as the layer of the water is
conductive.
Magnetic
separation
Magnetic
separation is a process in which magnetically susceptible material is extracted
from a mixture using a magnetic force. This separation technique can be useful
in mining iron as it is attracted to a magnet. This process of separating
magnetic substances from the non-magnetic substances in a mixture with the help
of a magnet is called magnetic separation.
Automated
ore sorting
Modern,
automated sorting applies optical sensors (visible spectrum, near infrared,
X-ray, ultraviolet), that can be coupled with electrical conductivity and
magnetic susceptibility sensors, to control the mechanical separation of ore
into two or more categories on an individual rock by rock basis. Also new
sensors have been developed which exploit material properties such as
electrical conductivity, magnetization, molecular structure and thermal
conductivity. Sensor based sorting has found application in the processing of
nickel, gold, copper, coal and diamonds.
Dewatering
Dewatering
is an important process in mineral processing. The purpose of dewatering is to
remove water absorbed by the particles. This is done for a number of reasons,
specifically, to enable ore handling and concentrates to be transported easily,
allow further processing to occur and to dispose of the gangue. The water extracted
from the ore by dewatering is reused for plant operations after being sent to a
water treatment plant.
After
learning about general processes of mineral extraction, let us now turn to
specific processing of individual minerals. The following are the descriptions
of the ways in which various, named minerals are processed:
Iron
processing
The process of iron extraction is carried out by the following
steps:
·
Concentration of ore:In this
metallurgical operation, the ore is concentrated by removing impurities like
soil etc. The process involves the crushing and washing of ore.
·
Calcination or roasting
of ore:The concentrated ore is now heated in the presence of air. The
process of roasting is performed to convert the iron to iron (III) oxide, Fe2O3.
Before being introduced into the blast furnace, all forms of iron ore must be
converted into the oxide.
·
Reduction of ore:The
process of reduction is carried out in a blast furnace. The blast furnace is a
cylindrical tower in which the ore is reduced to iron metal. Iron ore, coke and
limestone are mixed together to give a mixture called charge. The charge is
introduced into the blast furnace.
In the
blast furnace, carbon is oxidized to carbon monoxide gas. The carbon monoxide
gas reduces the iron (III) oxide to molten iron, which is removed as either pig
iron or cast iron. This is the raw material for production of iron, steel and
other products. Pig iron is made into steel by melting it to remove all its
impurities, after which small amounts of other metals are added to make
different types of steel.
The impurities in the ore, mainly silicon oxide (silica) reacts
with limestone to form calcium silicate (slag) which is tapped off from the
furnace and put into various uses.
Iron
processing
Copper
processing
Copper
ore is mined in open pits and below ground. The mined ore is ground,
concentrated and slurried with water and chemical reagents. Air is blown
through the mixture and attaches to the copper, causing it to float to the top
of the slurry. The copper is then removed with skimmer (a machine that
separates a liquid from particles floating on it or from another liquid). The
tailings (materials left over after the mineral has been separated from the
gangue of an ore) remain and are dewatered and disposed off in tailing ponds.
The water is recovered and recycled.
The
concentrated copper recovered through floatation is dried and then smelted in
copper smelters. The smelters reduce the concentrate to copper blisters. The
copper blisters contain 97–98% of pure copper. To get pure copper, which must
have a purity of 99% to be effective for electrical wiring and other purposes,
the copper blisters are purified by electrolysis. This purification process is
called copper refining.
Gold
processing
The ore
is crushed and dissolved in a solution of sodium cyanide. The chemical
dissolves the gold particles leaving behind stone and other mineral waste. The
sodium cyanide solution containing gold particles is drained off and mixed with
zinc dust which causes the gold particles to solidify. The particles are then
separated, dried, melted and moulded into bars called ingots.
Aluminium
processing
Aluminium is processed by the following three steps:
·
Concentration of the ore:Aluminium
ore, bauxite, is mined from the ground by open-cast mining. The ore is then
sorted, crushed, grinded and fed into large grinding mills where it is mixed
with sodium hydroxide solution at high temperatures and pressure. The grinding
mill grinds the ore to an even finer size. The material finally discharged from
the mill is called slurry.The
resulting liquor contains a solution of sodium aluminate and undissolved
bauxite residues containing iron, silicon and titanium. These residues,
commonly referred to as “red mud”, gradually sink to the bottom of the tank and
are removed.
·
Purification of the ore:The
sodium aluminate obtained in the above stage is purified through a number of
industrial processes to get aluminium oxide (alumina).
·
Electrolysis:The
purified aluminium oxide is then electrolysed to get pure aluminium metal.
Because aluminium oxide has a high melting point, it dissolved in molten cryolite to lower its melting
point because it is too expensive to carry out electrolysis at very high
temperatures.During electrolysis the molten metal falls to the bottom of the
electrolytic cell and is tapped off.
Contribution of
Mining Industry to the Economy of Tanzania
The Economic Importance of Mining to the Economy of Tanzania
Explain
the economic importance of mining to the economy of Tanzania
Contribution of the mining industry to the economy of Tanzania
include:
1. Creation of employment opportunities:The
mining sector has led to creation of employment opportunities to local
Tanzanians. Many people are employed as mine workers and in mineral processing
industries. A good number of people are also engaged in mineral trade which
consists of purchasing and selling of minerals such as gold, tanzanite, diamond
and other gemstones.Many people are also employed in industries that emerge due
to mining, for instance, people are employed to run shops and hotels that serve
workers and their families.
2. Urbanization:Mining activities attract
settlement which, in turn, attracts delivery of social services and amenities.
This leads to development of towns. For example, Nyamongo village in Tarime
District was once undeveloped but, after gold discovery and establishment of a mine,
the village has now grown into a township.
3. Development of other sectors:The mining industry has
led to the development of other sectors such as agriculture, trade and
transport and communication. For example, the road from Tarime Town to North
Mara Gold Mine at Nyamongo village has been improved by mine owners, a fact
that has led to improvement of transport and communication between Tarime and
the village. Also, transmission of electricity from Tarime to Nyamongo and
adjacent villages, such as Kemakorere, Nyarero, Nyamwaga and Geisangora, was
made possible because of the presence of a mine.
4. Provision of raw materials:The
minerals obtained from the mining industry provide raw materials for other
industries. For example, tanzanite and gold are sources of raw materials for
making jewellery. Gypsum is the raw material for cement making industries.
5. Foreign exchange:The mining industry
provides foreign exchange to the country through export of minerals and mineral
ores. The contribution of the mining sector to the country’s GDP has risen in
recent years following increased production of minerals, such as gold, diamond,
tanzanite and other gemstones.
6. Improvement of social services:Mining
companies improve service delivery to local communities through investment in
community projects, such as construction of social infrastructures which
include schools, hospitals, boreholes, roads and many others. Many mining
companies have managed to provide these services to local communities, thereby
improving the living standard of the local people. This has, in turn, helped a
great deal to improve the public relation between mine owners and the host
communities.
The effects of the
Mining Industry in the Environment
The Effects of Mining to the Environment
Describe
the effects of mining to the environment
Mining activities can cause a great harm to the environment if
common sense is not observed during mining operation. The following are some
effects of the mining industry to the environment:
1. Land subsidence (sagging): Holes
created due to underground mining cause land to sink (or subside). This is
because the holes underneath the ground cause imbalance in weight of the soil
above the ground. This may result to severe damage to buildings and other
infrastructures such as roads, railway trucks and so forth.
2. Poisonous substances: Poisonous compounds
(for example of lead, cadmium and arsenic) are found in many ores. These may be
washed into the soil and streams because of the mining process. If they happen
to reach the water, they can kill fish and plant life, and can end up in your
food as well.
3. Large volume of waste: Large-scale mining
operations inevitably produce a great deal of waste. This waste not only
comprises of earth from the soil and gangue but also includes the toxic
chemicals added to the ore to aid mineral extraction. The waste material gets
washed into streams and rivers. The sediment that
builds up, blocks rivers and alters their routes. This serves as a source of
pollutants to natural water systems.
4. Air pollution: Large-scale mineral
extraction results to production of gases such as sulphur dioxide, carbon
dioxide and other bad gases which are emitted to the atmosphere. These gases
may bring about a green house effects and even cause acid rains.
5. Noise and dust: Mining activities
produce a lot of noise and dust. Noise and dust can be due to haulage trucks,
rock blasting and crushing, drilling operations, and heavy traffic. Everything
for miles around the mine may get covered with dust. The loud sound due to
blasting of rocks is likely to destroy the adjacent buildings due to earth
tremor.
6. Big holes in the ground: Mineral extraction
leads to boring of deep holes through the ground in the course of searching for
rich ores. Huge amounts of rock are dug up to get a small amount of ore. For
example, 1000 tonnes of rock may produce just 5 tonnes of copper. This leaves
huge scars on the landscape (if it is opencast method) or huge holes
underground (if it is underground mining).
7. Great heaps of earth material:
Unwanted rock material, after the metal has been extracted from the ore, gets
heaped up in tips. These are unsightly. They can be unstable and therefore
dangerous. During heavy rains, a landslide is likely to occur, a catastrophe
that often results to loss of life and destruction of property.
8. Soil erosion: Before mining
operations are carried out, the natural vegetation on and around the mining
site is usually cleared up in order to give enough room to mining activities.
The consequent removal of vegetation cover leaves the soil bare and, therefore,
susceptible to erosion. Prolonged soil may, in turn, lead to aridity and loss
of biodiversity.
Ways of Minimizing Effects of Mining to the Environment
Propose
ways of minimizing effects of mining to the environment
Measures should be taken to minimize the effect of the mining
industry to the environment. Some of these measures are being practiced in many
areas affected by mining activities. The measures include the following:
1. Cleaning
up the existing and abandoned mines. The following are some of the ways through
which water pollution by mines can be controlled: Mining companies should clean
up abandoned mines which continue to release pollutants to the environment; New
mines should not be established in areas where they are likely to cause water
pollution problems; Mining practices which cause water pollution should be
banned.
2. Enacting
and enforcing the laws that govern environmental conservation. The laws and
regulation should be put in place that direct how the mining companies should
carry out their operations and activities without causing environmental
pollution. Stern measures should be imposed against any mining company that
pollutes the environment. Punishments may include fines, jail sentences or even
closure of the mining activities.
3. Stern
controls apply to the production of wastes that may be toxic or may cause
environmental damage. Safety regulations and practices must be maintained to
avoid the risk of accidental release of harmful materials.Governments are
getting ever tougher with mining companies about damage to the environment.
Sadly, in developing countries like Tanzania where much mining takes place,
laws may be less strict.
4. Rehabilitation
of the land after mining has practically ceased following exhaustion of
minerals. Rehabilitation involves reclaiming the abandoned mine and re-using
the land for other economic activities. Land rehabilitation activities can
include levelling of the heaps of rock, replacement of the top soil with a
fertile one, filling up the holes, and planting trees in the mined out areas.
Care must be taken to relocate streams, wildlife and other valuable
resources.Quarries and opencast workings can be reclaimed by the process of
filling the holes with solid wastes. The eroded bare soil can be conserved by
planting trees and grasses to serve as a soil cover, which would counteract the
impacts of wind, running water, rain and animals to the soil.Reclaimed land can
have many uses such as agriculture, forestry, wildlife, settlement and
recreation.
5. Carrying
out Environmental Impact Assessment before starting the mining operations in an
area will help establish the environmental effects the mining activities are
likely to cause to the environment. This should be carried out before mining
companies are licensed to undertake their activities. When the negative effects
far outweigh the benefits, then such activities should never be allowed to
proceed.
6. Dust
levels can be controlled by spraying water on roads, stockpiles and conveyors.
Other steps can also be taken including filling of drills with dust collection
systems, and purchasing additional land surrounding the mine to act as a buffer
zone. Trees planted in these buffer zones can also minimize the visual impact
of dust from the mining operations to local communities.
7. Noise
can be controlled though careful selection of equipment and insulation and
enclosures around machinery.
8. The
poisonous and toxic substances used in metal extraction must be treated
properly before being directed into rivers and streams. Alternatively, these
materials may be drained into reservoirs where they can gradually percolate
deep into the soil and evaporate into the air without causing much harm to the surrounding
ecosystems. In some mines, absorbent carpets are spread on the surface of the
ground to trap the toxic substances contained in liquid chemicals, hence
preventing these chemicals from finding their way into water bodies.
Focal Studies
Oil Production in the Middle East
Oil
production in the Middle East
The
Middle East is the largest oil-producing region in the world. It accounts for
over one third of the total world production. Te major producers of oil in this
region include Saudi Arabia, Iraq, Kuwait, Iran and the United Arab Emirates.
Others include Bahrain, Qatar and Yemen.
Most of
these countries are members of the Organization of Petroleum Producing
countries (OPEC), an intergovernmental organization which plays key role in
managing and overseeing the oil industry, including fixing of the oil price and
regulation of oil production among member states, among other functions.
The
prospection, drilling, refining and transportation of petroleum are mainly
carried out by international companies from Europe and America.
A portion of the oil is refined in oil refineries within the
Middle East while the rest is exported overseas as crude oil.
Natural Gas Production in Tanzania
Natural
gas production in Tanzania
Natural
gas is a fossil fuel formed when layers of buried organic matter are exposed to
intense heat and pressure over thousands of years. It is used for various
purposes such as generation of electricity, fuelling machines, cooking,
heating, etc.
Tanzania
has recently managed to exploit this mineral at Songosongo in Kilwa, Lindi
region. The gas is processed at Songosongo and then transported via pipeline to
Dar es Salaam where plans are under way to use the resource to generate
electricity. It will also be supplied to homes and industries for heating and
other operations.
The
country has so far four natural gas fields, namely Songosongo, Mnazi Bay,
Mkuranga and Kiliwani North. Of these, only two gas fields – Songosongo and
Mnazi Bay – are producing. The rest are still being developed.
Advantages of Oil Production in the Middle East and Natural Gas
Production in Tanzania
Describe
advantages of oil production in the Middle East and natural gas production in
Tanzania
Advantages
of oil production in the Middle East
1. Source of foreign currency:Most of
the oil used in many parts of the world comes from the Middle East. A large
amount of oil is exported from this region, so the countries earn the much
needed foreign exchange which is, in turn, invested in others sectors such as
manufacturing industries, commerce and trade.
2. Creation of employment opportunities:Most of
the Middle East countries lie entirely in the heart of the desert. So it is
hard to undertake other economic activities such as agriculture. Most people
are solely employed in the oil production industry, which provides them with
income that they spend on their basic needs. People are employed to work in oil
extraction, transportation, or sale of petroleum products.
3. Improvement of social services:The
money earned from the oil industry is invested in other sectors of economy. It
is also used to established or improve social services and other amenities. The
governments spend huge sums of money to set up social services such as schools,
hospitals, games and sports, etc.
4. Improvement of transport and communication:The
income generated by the oil industry is used to develop roads railways,
harbours, and airports. This has consequently led to improvement of
transportation and communication infrastructures in the region.
5. Generation of energy and power:The oil
produced provides the Middle East countries with energy and power that is used
for various purposes, including running vehicles and other machinery.
Advantages
of natural gas production in Tanzania
1. The
industry is a source of employment opportunities to Tanzanians since many
people are directly employed in the gas sector as prospectors, engineers,
miners, transporters, etc. This helps to curb the problem of unemployment as
well as improving the living standards of the people.
2. Discovery
of natural gas in remote areas of Lindi, Coast and other parts has helped to
solve the problem of rural–urban migration since people now can stay in the
rural areas and engage in gas production. This has greatly helped reduce the
population pressure in urban areas as well as minimize the problems associated
with overpopulation.
3. One of
the major uses of natural gas is the production of cost-effective electricity.
It is expected that when more electricity generated from natural gas will be
available to consumers, the cost of electricity will drop significantly. This
will, in turn, reduce the burden of high living costs to Tanzanians.
4. Cheap
electricity generated from natural gas will soon be supplied to industries. The
cost of production of goods and services will thus be cut short. Hence, the
goods and services will be available to people cheaply. This will lower the
cost of living and hence improve the living standards of the people.
5. Exportation
of natural gas and sale of electricity will increase the government revenue.
The revenue collected will then be used to improve public services to people
around the gas fields and the entire country in general.
6. Due to
availability of cheap electricity people will no longer cut down trees for
firewood and charcoal. This will help conserve the forest and the environment.
Disadvantage
of natural gas production in Tanzania
1. Even
though people are compensated when they give their lands for construction and
expansion of gas projects, the compensation is very small. The houses and other
infrastructure belonging to poor people are demolished carelessly before they
are compensated or relocated, a fact that bothers these citizens a great deal.
2. The
natural gas is a highly explosive substance. It can cause great loss of life
and property to the people living or undertaking their activities close to gas
pipelines in case the gas in the pipeline explodes and catches fire
spontaneously.
3. Because
the gas is a non-renewable resource, it can be exhausted or get used up. This
could destabilize the activities and sectors whose existence relies upon the
availability of natural gas.
4.
TOURISM
Concept
of Tourism
Tourism
5. Define
tourism
6.
Tourism refers to the travel for recreation, leisure, religious,
family, or business purposes, usually of a limited duration. Tourism is
commonly associated with trans-national travel, but may also refer to travel to
another location within the same country.
7.
Tourism has become a popular global leisure activity. Today,
tourism is a major source of income for many countries, and affects the economy
of both the source and host countries. So tourism is very important for
economic growth.
8.
There are two categories of tourism, namely, domestic and
international tourism. Domestic tourism involves travel within the same
country. For example, when someone sets out from Dar es Salaam to Mikumi
National Park to view wild animals, he or she is practising domestic tourism.
9.
International tourism involves travelling from one country to
another for leisure, business, education, etc. For example, many people travel
from Europe and America to Tanzania to climb Mount Kilimanjaro, view wild game
in national parks, or visit cultural places such as the Amboni Caves, Kilwa
ruins, and other interesting sites for leisure and refreshment. International
tourism has both incoming and outgoing implications on a country's economy.
Factors for the
Development and Growth of the Tourism Industry in the World
Factors Which have Contributed to the Development and Growth of
Tourism in the World
Describe factors
which have contributed to the development and growth of tourism in the world
Physical
factors
·
Good climate: Good
climate is one of the most important features of attraction for any tourist
place. Pleasant climate with warmth and ample sunshine attracts tourists who
come from the temperate and colder regions. For example, most tourists from
temperate countries visit Tanzania when it is winter in their home countries in
order to enjoy the warm and favourable climate found in Tanzania. On the other
hand, people from summer areas migrate to cooler regions to seek pleasure of
coldness and fresh environment. Other countries such as Switzerland, Sweden,
etc have a cooler climate that attracts tropical tourists.
·
Beautiful scenery: This
refers to the beautiful features that are attractive to look at. Tourism booms
at picnic spots with beautiful sceneries. For example, sunrise and sunset
points, long sea beaches, mountains, craters, lakes, canyons, deserts,
waterfalls, etc., often attract large numbers of tourists.
Socio-economic
factors
1. Accessibility: Of all socio-economic
factors, accessibility is the most important one. All tourist centres must be
easily accessible by various modes of transportation like roads, railways, air
and water. To enjoy seeing nature's beautiful sites, travelling by roads and
railways is a better option. If a tourist plans to reach a remote tour-destination
in the quickest possible time, then airway is the most suitable choice.
Generally, waterways are seldom selected unless a tourist decides to enjoy a
luxury travel experience in sea and/or interested to visit an isolated group of
islands.
2. Accommodation: Places of tourists'
interest must be able to provide good accommodation and catering facilities. A
type of accommodation required by tourists depends on their lifestyles,
standard of living, capacity to spend money, nature of services expected, etc.
Classification of accommodation centres (i.e. various hotels, motels,
dormitories, lodges, cottages, etc.) on basis of rating, like five stars and
below, is essential so that tourists can make a proper choice and plan their
trips appropriately. Generally, tourism mostly prospers in those areas where
good lodging and food facilities are available at reasonable prices.
3. Amenities: Growth of tourism at a
particular place is also influenced by crucial factors such as how well the
site is maintained for touring activities like skiing, roping, paragliding,
rowing, fishing, surfing, safari adventure, etc and whether emergency
facilities are available or not, and so forth.
4. Ancillary services: If a tour destination
is equipped by ancillary (supplementary) services like banking and finance, the
internet and telecom connectivity, hospitals, insurance, so on, then such a
place succeeds to hold (retain) more tourists for a longer time. This helps to
boost the local economy to some extent.
Political
factors
People
like to travel around the world if there is peace, harmony and stability like
Tanzania. They normally avoid areas with political problems such as civil wars.
In case of instability, due to war or terror attacks, people travel less to
countries affected with such chaos. Often, some countries warn their citizens
about visiting countries with political instability like tribal wars, terror
attacks, political unrest, etc. For example, after September 11 terror attack
on the US, her citizens were warned not to travel to certain destinations.
Also
the government policy can encourage the development of the tourism industry by
financing or giving favourable conditions which are not restrictive to visitors
touring the country
Historical
and cultural factors
Many
tourists are attracted to places of historical significance and which have a
legacy of rich cultural heritage. People love and enjoy exploring destinations
where there are famous ancient monuments, marvellous forts, castles and palaces
ruled by kings and queens in historical times, etc. Examples of places that are
famous throughout the world for their historical and cultural accounts are
Kilwa ruins in Tanzania, Fort Jesus in Kenya, Taj Mahal in India, Nazca lines
and Machu Picchu in Peru, Pyramid of Giza in Egypt, Great Wall of China and
Stonehenge in England.
Religious
factors
People
often make pilgrims to places of religious importance to seek inner peace, get
blessing of their favourite gods and spiritual leaders, attain salvation before
death, etc. Here, faiths, beliefs and sentiments of people contribute in
booming tourism at holy places. Examples of places that are well known for
their religious significance are Jerusalem in Israel, Mecca and Medina in Saudi
Arabia, Varanasi and Amritsar in India, etc.
Other
factors
·
Adventures:
Research activities and adventures of deep seas and caves, geological studies
of hot-water springs and geysers, seismic analysis of active volcanoes,
investigation of paranormal activities in abandoned spiritual towns, etc also
contribute in developing tourism on some scale.
·
Marketing:
Tourism is nowadays being advertised via various mass media so as to alert the
potential tourists about the presence of tourists’ attractions present in a
given country. Various adverts are made via TV, radio, posters, documentaries,
etc. In this way, the organizations and individuals involved in the tourism
industry are able to attract many visitors. This leads to development of the
tourism industry.
·
Trained manpower:
Availability of trained manpower encourages development and expansion of the
industry. People are trained about hospitality and how to care for the
tourists. Training is based on languages and communication skills, hotel
management, tour guide, and any knowledge on handling of tourists. Decent hospitality
in destination countries normally encourages the tourists to visit them
frequently.
Importance of Tourism
in the World
Importance of Tourism in the World
Explain
the importance of tourism in the world
Tourism has become one of the most important sectors in the
world economy. Tourism is important in a number of ways which include the
following:
1. Source of employment:Tourism creates jobs
through direct employment within the tourism industry, and indirectly in
sectors such as retail and transportation, tour guiding, tour operation, hotel
management, pottery, etc.When tourists spend their wages on goods and services,
it leads to what is known as “multiplier effect”, creating more jobs. The
tourism industry also provides opportunities for small scale business
enterprises which is especially important in rural communities, and generates
extra tax revenues such as airport and hotel taxes which can be used to improve
social services such as education, health, and housing.
2. Source of foreign exchange:Tourists
pay for their services in foreign currency, which adds to the country’s foreign
currency, thus helping to stabilise the economy.
3. Improvement of infrastructure:The
improvement of infrastructure and new leisure amenities that result from
tourism also benefit the local communities. These infrastructures may include
renovation of existing roads and construction of new ones, development of air
strips and air ports, and improvement of communication facilities. All of these
benefit the visitors as well as the local people.
4. Promotes international relations:Tourism
often involves the movement of people from one country to another. This
movement of people promotes political, economic, and social relations between
the countries.
5. Source of government revenue:Tourism
earns the countries of destination the revenue from various sources which
include fees into game parks and reserves, taxes charged on various tourism
services offered, and visa fees among others. This income can be invested in
improvement of different social services.
6. Conservation of wildlife and environment and protection of
historical sites:Tourism contributes to conservation of wildlife and natural
vegetation which leads to conservation of soil and catchment areas. If this was
not done some animal and plant species would have been extinct and historical
sites ruined.
7. Economic use of marginal lands:Tourism
enables the marginal unproductive land to be used for economic development
rather than staying idle. For example national parks with wildlife which serve
as tourist attractions occupy unproductive lands.
8. Preservation of culture:Tourism encourages the
preservation of traditional customs, handicraft, and festivals that might
otherwise have been allowed to wane and it creates civic pride. Interchanges
between hosts and guests create a better cultural understanding and can help
promote global awareness of issues such as poverty and human rights abuses.
Impact of Tourism in the World
Identify
impact of tourism in the world
Tourism
can bring many economic and social benefits, particularly in developing
countries. However, mass tourism is also associated with negative impacts.
Tourism can only be sustainable it if is carefully managed so that potential
negative effects on the host community and the environment are not permitted to
outweigh the financial benefits.
Positive impacts of tourism
1. As explained
early, tourism has led to creation of job opportunities. Many people have been
employed in the tourist sector, a fact which has helped improve their quality
of life.
2. It has
led to development of infrastructure in host countries. In Tanzania, for example,
roads to national parks such as Serengeti National Park have been improved. And
also airstrips have been constructed in many national parks so as to facilitate
the transport of tourists to and from the parks.
3. It
brings together people of different colours, cultures and religions. This leads
to interaction of cultures, especially the awareness of other people’s values
and belief which may be different from others. The outcome is realization of
peace and harmony among different religions and culture.
4. It
leads to job creation in rural areas, thereby reducing rural-urban migration.
This has led to reduction of population pressure and its associated effects in
urban areas. In some cases, people move from urban to rural areas to engage in
tourism activities.
5. It has
led to diversification of economies of countries involved in the sector. For
example, tourism is now earring more revenue than agriculture and other sectors
of the economy in Tanzania.
6. Tourism
has enabled sustainable conservation of wildlife and the environment and
preservation of cultural heritage and historical sites.
7. It
earns the destination countries the much needed foreign exchange. For example,
Tanzania’s economic growth is highly boosted by her flourishing tourism
industry.
Negative impact of tourism
1. Visitor
behaviour can have adverse effects on the quality of life of the host
community. For example, overcrowding and congestion, drug and alcohol problems,
prostitution, and increased levels of crime can occur in areas where tourism
takes place. There has been a marked increase in crime in areas frequently
visited by tourists as these areas attract thieves who steal tourists’ and
hosts’ properties as well as engaging in their illicit drug and other illegal
businesses.
2. Tourism
can even infringe on human rights with locals being displaced from their land
to make way for new hotels or barred from beaches. Interaction with tourists
can also lead to erosion of traditional cultures and values.
3. Tourism
poses a threat to natural and cultural resources such as water supply, beaches,
coral reefs and heritage sites through overuse. It also causes increased
pollution through traffic emissions, littering, increased sewage production and
noise.
4. Successful
tourism relies on establishing basic infrastructures such as roads, visitor
centres and hotels. The cost of this usually falls on the government, so it has
to come out of tax revenues that could otherwise be directed towards
improvement of social services.
5. Jobs
created by tourism are often seasonal and poorly paid, yet tourism can push up
local property prices and the cost of goods and services. Much as this has
benefited the traders, the goods have become unaffordable to the locals.
6. Money
generated by tourism does not always benefit the local community as some of it
leaks out to huge international companies such as hotel chains.
7. Destinations
depending on tourism can be adversely affected by events such as terrorism,
natural disasters and economic recession. This may become a problem if the
tourism sector is negatively affected. The governments and the local
communities will be deprived of the foreign exchange leading to a drop in
economic growth and hence the quality of life.
Ways of Addressing the Negative Impact of Tourism
State ways
of addressing the negative impact of tourism
Ways of addressing negative impact of tourism include:
1. Laws
and policies should be put in place that ensures the revenue accrued from
tourism benefits the local community and the government in general.
2. Tourists
should be directed to obey the culture and traditions of the host communities.
For example, they should be ordered to dress in a manner acceptable to the host
communities.
3. The
countries and local communities that depend heavily on tourism industry should
diversify their revenue sources such that when the tourism industry collapses
they do not suffer economic difficulties.
4. In
order to conserve and preserve the environment, tourists should be required to
dispose off their litter in a proper way. Those who disobey the rules should be
heavily fined. Also there should be restrictions on the number of vehicles
allowed in a certain area so as to prevent air pollution caused by exhaust
fumes.
5. The
laws, rules and regulations should be enacted and enforced to combat criminal
incidences, child labour, drug abuse, and prostitution. This should be
accompanied by stern punishments for those who fail to comply with the law.
6. New
tourist attractions should be established and developed so as to reduce
pressure exerted to already established attractions. This will check congestion
in the existing tourist centres.
7. The
local people should be involved in tourism activities so that they benefit in
conserving the tourist attractions like wildlife conservation areas, etc.
8. There
should be integration of tourist activities with the protection of the
environmental condition through the eco-tourism approach.
Focal Studies on
Tourism Industry
Factors for the Development of Tourism in Switzerland, Namibia
and Tanzania
Describe
factors for the development of tourism in Switzerland, Namibia and Tanzania
This
section deals with tourism industries of selected countries around the world.
In this case we shall study the tourism industries in Switzerland (Europe) and
Namibia (Africa) as well as our own tourism industry in Tanzania.
Tourism
in Switzerland
Switzerland
is located in Central Europe, bordered on the North by France and Germany, on
the East by Austria and Liechtenstein, on the South by Italy, and on the West
and South-West by France. This land locked alpine country has an area covering
41,290 km2, making it slightly less than twenty three times the size
of Tanzania.
Tourists
are drawn to Switzerland’s Alpine climate and landscape, in particular for
mountaineering (sport of mountain climbing, including skiing, hiking, skating,
etc). As of 2011, tourism accounted for an estimated 2.9% of Switzerland’s
Gross Domestic Product (GDP).
Factors
favouring the development of tourism in Switzerland
1. Geographical factors:Switzerland is located in
the centre of Europe, making it close to rich industrialised countries which
are a major source of her tourists. These industrialised countries include
France, Germany, Italy and Britain. In addition, the excellent transport
network ensures easy and cheap movement of tourists.
2. Beautiful scenery:Switzerland is a land of
intense natural beauty, dominated by mountain peaks. Most travellers visit the
country to experience the scenery and are also pleasantly surprised by the
cultural treasures found in the cities and tourism centres.Places such as
Zurich, Geneva, Basel and Lausanne offer world-class museums, lively arts
scenes, lovely old architecture, fine dining and all the luxuries that come
with great cities. There are also many smaller towns and resorts that can serve
as a base for tourists looking to enjoy the landscape.
3. Favourable climate:The climate is moderate,
with no excessive heat, coldness or humidity. The snow during winter, encourage
winter sports such as skiing and ice skating. Warm and sunny summers facilitate
viewing of the beautiful scenery as well as swimming and sunbathing.
4. Good transport system:Switzerland has a well
development transport system, ranging from trains to ferries to cable cars that
easily take visitors to tops of the mountains. Some means of transport include
cars, buses, electric trains, cable cars and aerial lifts access mountain
resorts. And because Switzerland is a small country its attractions are close
together, so most of them can be reached quite easily.
5. Accommodation:Switzerland has a great
number of first-class hotels to suit the needs of its tourists. There are also
cottages, camping sites, taverns and guest houses.
6. Hospitality:The Swiss hospitality
standard and methods have traditionally been regarded as the best in the word.
The Swiss people are hospitable and the personnel handling tourists are well
trained and efficient. The Swiss people speak a number of different languages,
making it easy to communicate with visitors from a number of different
countries.
7. Political stability and neutrality:Switzerland
has been and continues to be neutral in world affairs such as the world wars.
As such, tourists from different parts of the world feel free and safe to visit
the country since it has no enemies to endanger its security. With a low crime
rate, Switzerland is very safe for tourism.
8. Package tours:The organisation of
package tours, in which all tour arrangements, including hotel bookings and
travel are done by a company, has increased the number of tourists visiting
Switzerland. These kinds of tours are affordable to many people in the society.
9. Centre for international meetings:The
headquarters of many international organisations such as WHO, ILO, FIFA, UNHCR
and many others are based in Switzerland, particularly in the cities of Zurich
and Geneva. Many meetings and conventions are held in Switzerland. People attending
these meetings and conventions also take time off to tour the country, thus
contributing to the country’s leisure business and tourism industry.
10. Industrialization:Switzerland produces a
variety of manufactured goods, some of which are used in the tourism industry.
Because the country is highly industrialised, the employees earn good income
and are able to save for holidays. Domestic tourism accounts for more than 25%
of the tourist population.
Double-decker cable car: the first such cars in the world, able to
carry 180 passengers
The Importance of Tourism in Switzerland, Namibia and Tanzania
Explain
the importance of tourism in Switzerland, Namibia and Tanzania
The
significance of tourism in Switzerland
1. Source of employment:Many Swiss are employed
in the tourism sector. About 5% of the workforce is employed in the sector,
although this share is higher in mountain regions than it is in urban areas.
This has enabled the people to improve their incomes and hence their standards
of living.
2. Source of foreign exchange:Tourism
is an important source of foreign exchange. It is the third largest foreign
exchange earner, thus contributing significantly to the country’s economy.
3. International relations:The tourists visiting
Switzerland from different countries help strengthen the relationship between
Switzerland and the tourists’ countries of origin.
4. Source of revenue:Tourism is a major source
of Switzerland’s revenue. It accounts for about 3% of the total GDP.
5. Environmental conservation:To ensure
constant visit by tourists, the Swiss have taken much efforts to conserve their
environment. Some measures have been taken to reduce emission of green house
gases which can cause global warming and hence melt the snow on the Alps, thus
destroying tourist attractions.
Importance
of tourism in Namibia
1. The
revenue obtained from tourism industry is invested in the development of
infrastructure such as transport and communication as well as improving other
public services.
2. Tourism
contributes significantly to the country’s economy. It is the third contributor
to the GDP after mining and agriculture respectively.
3. The
people of Namibia are employed directly and indirectly by the tourism sector.
Employment in tourism amounts to about 20% of all formal jobs in Namibia. This
has helped to reduce the level of unemployment in the country and has improved
the living standards of Namibians significantly.
4. Tourism
has had a positive impact on resource conservation and rural development. It
has ensured preservation of tourism attractions like national parks, game
reserves, forest reserves and cultural centres. Some fifty commercial
conservancies have been established across the country, covering 11.8 million
hectares of land, resulting in enhanced land management while providing
thousands of Namibians with much needed income.
5. Social
services have improved in the country especially with the introduction of
community-based tourism.
6. Namibia
is highly respected by other stakeholders in the tourism industry especially in
ecotourism. This promotes cooperation between Namibia and other countries of
the world.
The
importance of tourism in Tanzania
1. Source of revenue:The government of
Tanzania receives the highly needed revenue from the tourism industry. Revenue
is collected on visa and gate fees at national parks and other sources. Also
wildlife hunting companies pay money for the game hunting blocks and licences.
The money obtained is invested in development projects and other social
services.
2. Improvement in the standard of living:The
money gained by people engaged in the tourism industry improves their
livelihood. This has also improved their purchasing power, enabling them to
contribute to the development of other sectors such as manufacturing and
agriculture.
3. Source of employment:Many Tanzanians are
employed directly and indirectly in the tourism industry. People are employed
to work in tourist hotels; as porters who carry tourist luggage; tour guides
and agents; and as owners of tourist companies. This has somewhat helped to solve
the problem of unemployment in the country.
4. Improvement of infrastructure:For
successful tourism business, good infrastructure is inevitable. The improved
transport and communication infrastructures not only benefit the tourists, but
it also benefits the local communities.
5. Market for locally produced goods and services:The
goods and services provided locally are sold to tourists or people engaged in
tourism. Tourism, therefore, provides a ready market for agricultural produce
and locally manufactured goods, such as sugar, cooking oil, and artefacts. This
promotes trade as well as the development of local industries.
6. Environmental conservation:Involvement
of the local communities in the tourism industry has made it possible for these
communities to participate in environmental conservation activities. The
conserved environment benefits all people residing around and away from these
tourist attractions. For example, forest conservation reduces the problem of
green house effect and global warming, an act that is beneficial to the general
community.
7. Strengthening of international relations:Tourism
helps to strengthen the relationship between Tanzania and the mother countries
of the visitors. This improves understanding and cooperation.
8. Source of foreign exchange:It is
estimated that tourism generates 25% of Tanzania’s foreign exchange. With
increased promotion and establishment of new tourist sites, the figure may
increase in future. This, in turn, improves the country’s economy and hence the
living standards of her people
Problems Facing Tourism Industry in Tanzania
Identify
problems facing tourism industry in Tanzania
Problems facing the
tourism industry in Tanzania include:
1. Poor transport and communication:Transport
and communication infrastructures are still in a very poor state. Many tourist
attractions are in remote areas but the roads connecting them from major urban
centres are very poor. This makes the attraction sites accessible only in some
months of the year. The roads are very uncomfortable to drive on. Access to
communication services, such as internet is also difficult and expensive
wherever available. This tends to discourage the tourists to visit attractions
located in remote areas.
2. Poor marketing:The tourist attractions
in the country have not been well advertised to local and international
tourists, hence most of them are unknown. Very little effort has been put to
market the industry worldwide via mass media and forums.
3. Human encroachment:The ever increasing human
population has led to encroachment on national parks and game reserves. This
threatens the wildlife in their natural habitats.
4. Limited capital:Tanzania is a very poor
country with a very poor economy. Much of her revenue is directed towards
provision of social services such that very little capital is left to be
invested in other sectors of the economy including the development of tourism
industry.
5. Poor coordination policies:There
is poor coordination on matters concerning tourism between the government and
stakeholders in the industry. The lack of proper coordination on polices and
marketing, among other issues, hinders the development of the industry.
6. Crime:High crime rates in tourist attraction areas
discourage tourists from visiting these areas. This makes the industry lack the
much needed income, thereby hampering its development.
7. Poaching:Poaching in Tanzania is
at alarming levels. This is one of the major problems affecting wildlife
conservation. Many animals are killed by armed poachers each year for trophies,
especially elephant tusks. The problem has led to extinction of some animals
such as the white rhinoceros, some birds and animals. The number of elephants
in the parks has drastically reduced in recent years following poaching.
8. Competition:There is a stiff
competition from other countries with the same attractions, which are more
developed and have a good set up of tourist facilities in terms of transport
and infrastructure, more comfortable and cheap hotels, favourable climate and
ample communication facilities.
9. Language:Very few people employed
in the tourist industry can speak many of a range of foreign languages apart
from English and French. Therefore, failure to master different languages
creates a communication barrier between the locals and the tourists.
Methods Used to Increase the Income of Tourism Industry in
Tanzania
Explain
methods used to increase the income of tourism industry in Tanzania
Ways of increasing income
from the tourism industry include:
1. Marketing and publicity:The government and other
stakeholders must put more efforts in advertising tourist attractions found in
the country so as to attract many tourists to visit them. This will, in turn,
increase the government revenue and the money obtained from the tourism
industry will be invested in tourism development and improvement of social
services.
2. Promotion of domestic tourism:In
spite of the government’s efforts to promote domestic tourism, participation of
the locals in visiting tourist attractions is still very low. The government
through the Ministry of Tourism and Natural Resources has an obligation to
further advertise and promote domestic tourism so as to encourage more locals
to visit tourist attractions. This undertaking can be achieved through reducing
the gate fees into game parks, game reserves and other attractions for local
tourists.
3. Package tours:Package tour or package holiday consists of transport and
communication advertised and sold together by a vendor known as tour operator. Other services may be
provided such as a rental car, activities or outings during the holiday.
Package holidays are organised by a tour operator and sold to a consumer by a travel agent. Some travel agents are
employees of tour operators, others are independent.Package tours are
affordable and less taxing to the tourists. Organising such tours will
encourage more people to visit since they are cheap and most of the organising
is done by a company.
4. Expanding tourist industry:New
tourist attractions like coastal areas and lakes should be opened and developed
so as to attract more visitors to visit the country. Tanzania has already
started developing the coastal areas into tourist centres. Also archaeological
and cultural centres should be developed. There are many of such centres in
Tanzania but they have not yet been fully developed and advertised to potential
tourists.
5. Training of tourism personnel:Tourism
is a service industry and the tourists must get the quality service for the
money they spend. When they get better services they are more likely to visit
again. It is therefore important to have trained personnel who are capable of
offering the best services. Tourism courses are offered at universities and
colleges.
6. Improvement of infrastructures:The
existing transport and communication infrastructures are not yet sufficiently
developed to offer the quality services to tourists. There is need to improve
the existing infrastructures, together with construction of the new ones.
Improved and quality infrastructures will encourage more tourists to visit the
country and hence increase the revenue gained from the industry.
7. Improvement of safety and security:Safety
and security to tourists is a very important aspect in development of tourism.
Measures should be taken to prevent any sort of crime around tourist centres
and in the whole country. This will influence the tourists to visit Tanzania as
they will be sure of their personal and property safety.
8. Controlling poaching:Poaching
reduces the number of game and may lead to extinction of some wildlife species.
Because wildlife is the major attraction to tourists visiting the country, more
game wardens, rangers, and guards should be deployed to combat poaching
activities in game parks and reserves. The government should employ more game
protection personnel and equip them with appropriate weapons to fight against
poachers.
Lessons to Promote Tourism Industry in Tanzania
Discuss
the lessons that can be drawn to promote tourism industry in Tanzania
How to
promote tourism in Tanzania
1. The
ministry of Natural Resources and Tourism, through Tanzania Tourist Board
(TTB), must promote Tanzania’s tourist attractions through conducting publicity
campaigns, preparation and publication of destination brochures and provision
of tourist information.
2. Improvement
and development of transport and communication infrastructures, particularly in
areas with tourist attractions, in order to make these attractions accessible
from the town centres.
3. Tourism
resources such as national parks and game reserves should be protected from
human encroachment. Also the environment on which the animals thrive, such as
natural vegetation and water resources should be conserved.
4. There
is need to identify and develop tourist attractions and improve the existing
ones so as to diversify the tourist activities. Special emphasis should be put
on improvement of pre-historical and archaeological sites, most of which are in
very poor states.
5. The
level of hospitality to tourists must be improved through training of the
tourism personnel so as to meet the world’s standards.
6. Attracting
both local and foreign investors to put up facilities such as hotels, motels,
lodges, etc. for tourists.
7. The
political stability, peace and tranquillity should be maintained to ensure maximum
security to tourists.
MANUFACURING INDUSTRY
Concept and Importance of Manufacturing Industries
Manufacturing Industry
Define
manufacturing industry
Manufacturing
is the production of goods for consumption or sale using labour, machines,
tools, chemical and biological processes or formulation.
The
term may refer to a range of human activity but is not commonly applied to
industrial production, in which raw materials are
transformed into finished goods on a
large scale. Such finished products may be used for manufacturing other more
complex products, such as aircraft, household appliances, automobiles, or sold
to wholesalers, who
in turn sell them to retailers, who
finally sell them to end users – the consumers.
Therefore,
a manufacturing industry is an industry that is involved in the large scale
manufacturing, processing, fabrication, or preparation of goods from raw
material or commodities
The Importance of Manufacturing Industry
Explain
the importance of manufacturing industry
The
manufacturing industry plays a vital role in the economy of many countries. It
contributes to growth and strengthening of the country’s economy. The
wealthiest countries in the world are heavily industrialised.
The manufacturing industry is important in the following ways:
1. Source of employment:Operations in any
industry require manpower or labour. People are employed to undertake various
activities carried out in a manufacturing industry. This helps lessen the
problem of unemployment in the respective country.
2. Diversification of economy:Whereby
the economy of a country depends mainly on other sectors such tourism, mining,
fishing, and lumbering, for example, the establishment of manufacturing
industries help to diversify the country’s economy. In this way, if one sector
collapses the economy will still remain stable.
3. Source of foreign exchange:The
finished goods from manufacturing industries are often exported overseas. The
sale of such goods earns the country the much needed foreign currency and hence
helps to improve the country’s economy.
4. Increased agricultural production:Most of
the agricultural produces are processed into finished products by the
manufacturing industries. So long as there is demand for agricultural produces
by the industries, farmers will produce more to meet the demand of the
industries. Hence agricultural production will increase because the surplus
from farmers finds a ready market, that is, the manufacturing industries.
5. It stimulates the development of infrastructure:Industries
require a good network of roads and railways linking them to areas where raw
materials are produced. Industries, therefore, lead to improvement of transport
infrastructure between their locations and the sources of raw
materials.Industries also need power and water infrastructure set in place.
Thus, they also lead to improvement of public services which could have
otherwise not been developed.
6. Improvement of international relations:The
exchange of goods and services for money between countries help to improve the
diplomatic relationship between the trade partners. This happens through
interaction of traders and business people between two or more trade partners.
7. Higher earning:Processing of raw
material adds value to a commodity, enabling the country earn more by exporting
processed goods than when exporting the unprocessed raw materials.
8. Reducing dependency on imports:Manufacturing
industries enable the countries to become self-sufficient in the goods they
produce. This means that the country can only import the goods and services
that are not manufactured within its borders. This reduces dependency on
imported goods, hence saving the government revenue and foreign currency that
could be spent on imported products. The revenue is consequently directed
towards improvement of social services in the country.
Types of
Manufacturing Industries
Types of Manufacturing Industries in East Africa
Describe
the types of manufacturing industries in East Africa
Manufacturing
industries are the industries concerned with processing and changing the raw
materials into semi-processed or finished products or goods. There are two
broad types of manufacturing industries as outlined below:
Processing industries
These
are primary industries which convert the raw materials into products that can
be used as raw materials for other industries which then process or convert
them into finished goods. Examples of processing industries include coffee
pulping plants, decorticators, cashew nut hullers and sisal processing
factories.
Fabrication industries
Products of Each Type of Manufacturing Industry
Identify
products of each type of manufacturing industry
Type of industry and product manufactured.
·
Heavy industries:These
are capital-intensive and large scale industries involved in the manufacture of
bulky and heavy products. The products are made by using raw materials like
iron and steel. Examples of heavy industries are those involved in the
manufacture of heavy machinery such as ships, cars, cranes, aeroplanes,
bulldozers and rockets.
·
Light industries:These
are less capital-intensive industries involved in the manufacture of consumer
goods, such as cosmetics, plastics, textiles, paper, shoes, consumer
electronics and home appliances. These industries require only a small amount
of raw materials, area, and power. The goods they manufacture are often small
but of relatively high value per unit weight.
·
High-tech industries:High
technology industries, often abbreviated ashigh
techorhi-techindustries
are the type of industries involved in the manufacture of high technology
products, such as electronic goods. Examples of electronic devices include
computers, phones, telephones, calculators, audio equipment, digital cameras,
electrical equipment, etc. The high–tech industry is capital-intensive and
reliant on research and development.
Factors for Location
of Industries
Factors Necessary for Location of Industries
Name
factors necessary for location of industries
Generally,
location of industries is influenced by economic considerations though certain
non-economic considerations also might influence the location of some
industries. Maximisation of profit which also implies cost minimisation is the
most important goal in the choice of particular places for the location of
industries. There are several factors which pull the industry to a particular
place. Some of the major factors are discussed below:
Raw materials
The
significance of raw materials in manufacturing industry is so fundamental that
it needs no emphasising. Indeed, the location of industrial enterprises is
sometimes determined simply by location of the raw materials.
Some
raw materials are bulky and heavy and transporting them over long distances may
be very costly. For this reason, industries which use heavy and bulky raw
materials in their primary stage in large quantities are usually located near
the source of the raw materials. For example, iron and steel industries in
Germany are located in the iron mining areas of the Ruhr region.
It is
also true in the case of raw materials which lose weight in the process of
manufacture or whose transport cost cannot be afforded or cannot be transported
over long distances because of their perishable nature. For instance, vegetable
and fruit processing industries are often located in areas close to the source
of these raw materials.
The
same case applies to those industries which depend on imported raw materials.
They are normally located close to the points of arrivals e.g. the sea ports or
along the coasts. For example, industries in Japan are concentrated close to
the coast because they use imported raw materials.
Power
Regular
supply of power is a pre-requisite for the location of industries. Coal,
mineral oil and hydro-electricity are the three important conventional sources
of power. Most industries tend to concentrate at the source of power.
The
iron and steel industries which mainly depend on large quantities of coking
coal as source of power are frequently tied to coal fields. Others like the
electro-metallurgical and electro-chemical industries, which are great users of
cheap hydro-electric power, are generally found in the areas of hydro-power
production, for instance, aluminium industry. Therefore, large and heavy
industries are quite often established at a point which has the best economic
advantage in obtaining power and raw materials.
However,
as petroleum can be easily piped and electricity can be transmitted over long
distances by wires, it is possible to disperse the industries over a larger area
if need be.
Labour
Adequate
supply of cheap and skilled labour is necessary for an industry. The attraction
of an industry towards labour centres depends on the ratio of labour cost to
the total cost of production. Labour supply is important in two respects: (a)
workers in large numbers are often required; (b) people with skill or technical
expertise are needed
The
nature and amount of labour required will depend on the type of an industry and
the kind of goods and/or services produced. Labour-intensive industries such as
automobile industries require a large workforce. So, such industries are
located in places with abundant labour. Some industries require skilled while
others need semi-skilled or unskilled labour
Industries
requiring semi-skilled and unskilled labour are often located in urban centres
where the availability of such labour is not a problem. However, unskilled
labour force is also abundant in urban centres, which mainly consists of
unskilled job seekers who move from the countryside to seek for greener
pastures in urban centres.
Transport and communication
Transport
by land or water is necessary for the movement of raw materials and for the
marketing of the finished products. A good transport and communication
infrastructure is important for carrying raw materials to the industry and
transporting finished goods from the industry to consumers. It is also required
for moving workers, machinery, chemicals and other materials.
Communication
is important in connecting with buyers and suppliers. Communication links are
facilitated by phones and computers. Manufacturers can easily market and
advertise their products via the internet. This also enables the buyers to make
their order online, a fact that lowers their trading costs significantly.
The
entire process of manufacturing is useless until the finished goods reach the
market. Nearness to market is essential for quick transport of manufactured
goods. It helps in reducing the transport cost and enables the consumer to get
things at cheaper rates.
A ready
market is most essential for perishable and heavy products. Perishable products
are such as vegetables, breads and milk. Industries producing heavy products
should be located close to potential markets so as to reduce the transportation
costs and eliminate the problems encountered in transportation of such
products.
Water
is another important requirement for industries. Many industries are established
near rivers, canals, and lakes because of this reason. Iron and steel, textile,
coffee pulping, sugar cane processing, paper mills, brewing, soft drink and
chemical industries require large quantities of water for their proper
functioning
Market
The
entire process of manufacturing is useless until the finished goods reach the
market. Nearness to market is essential for quick transport of manufactured
goods. It helps in reducing the transport cost and enables the consumer to get
things at cheaper rates.
A ready
market is most essential for perishable and heavy products. Perishable products
are such as vegetables, breads and milk. Industries producing heavy products
should be located close to potential markets so as to reduce the transportation
costs and eliminate the problems encountered in transportation of such
products.
Water
Water
is another important requirement for industries. Many industries are
established near rivers, canals, and lakes because of this reason. Iron and
steel, textile, coffee pulping, sugar cane processing, paper mills, brewing,
soft drink and chemical industries require large quantities of water for their
proper functioning.
Site
Site
requirement for location of an industry is of utmost significance. An industry
can only be located in an area if there is enough land space to build it.
Sites, generally, should be flat and well served by adequate transport
facilities. A large piece of land is required to build factories. Now, there is
a tendency to set up industries in rural areas because the cost of land in
urban centres has shot up.
Climate
Climate
plays an important role in the establishment of industries at a place. Harsh
climate is not much suitable for the establishment of industries. There can be
no industrial development in extremely hot, humid, dry or cold climate. Cotton
fabric industries require humid climate because cotton threads tend to break in
dry climate.
Capital
Modem
industries are capital-intensive and require huge investments. A lot of money
is needed in the establishment of infrastructure and transportation of raw
materials, goods and other requirements. Capital is also required to set up
industrial machinery. However, capital does not influence the location of an
industry to a large extent. It is only a problem in case the cost of land and
rent rates, especially in urban areas, are extremely high.
Government policies
Government policy in planning the future distribution of
industries, for reducing regional disparities, elimination of pollution of air
and water, and for avoiding their heavy clustering in big cities, is an
important factor in location of industries. The government may discourage the
concentration of industries in one place due to a number of reasons as outlined
below:
1. Economic reasons: Industries should be distributed equitably in the country to
ensure equitable development of all regions of the country. This will lead to
job creation and hence solve the problem of rural-urban migration. For example,
the location of many industries in different regions of Tanzania soon after
independence was due to this reason.
2. Political reasons: This is a case whereby political leaders dictate the location of
an industry in a certain area for mere political gain.
3. Environmental reasons: Industries produce much smoke and harmful waste. So they are
always located away from residential areas, arable land or community water
sources. This is done in order to avoid environmental pollution.
4. Security reasons: All industries are not concentrated in just one area to avoid great
loss in case of any sabotage or attack by terrors. It is, therefore, important
to establish industries in different locations.
Industrial location
Industries tend to develop at the place of their original
establishment, though the original cause for their location may no longer
exist. This phenomenon is referred to as inertia. It is sometimes termed as geographical inertia or industrial inertia. Such industries may
continue to exist in their previous locations due reasons such as:
1. The
availability of skilled and experienced labour.
2. The
presence of well developed transport and communication network.
3. Avoiding
the expenses that may be incurred in moving to a new place.
How Pollutants affect the Environment, Industrial Employees and
the Communities around the Plant
Explain
how each pollutant affects the environment, industrial employees and the
communities around the plant
During
operation, manufacturing industries produce various pollutants which can
pollute the environment and affect employees and the community in the vicinity
of an industry. These pollutants are likely to pollute the environment (land,
water, air and organisms) if proper measures are not taken to control the
release of pollutants to the environment. There are many pollutants resulting from
manufacturing industries.
Types
of industrial pollutants
Industries
release a diversity of pollutants which include gases, liquid waste, noise and
particulate matter. The effects of these pollutants are as outlined below:
Gases
Industries are the main sources of gaseous pollutants especially
in heavily industrialized countries. These pollutants include carbon monoxide
(CO), carbon dioxide (CO2), nitrogen oxides (NOx),
sulphur dioxide (SO2) and chlorofluorocarbons (CFCs).
·
Effects on employees:The
gases may be inhaled by the employees and cause serious health problems. For
example, carbon monoxide is a poisonous gas which combines with haemoglobin in
the blood and stops the haemoglobin carrying oxygen from the lungs to body
tissue and vital organs (most notably the heart and the brain). Inhaling high
levels of the gas can cause vision problems, physical or mental impairment and
even death.
·
Effects on the
environment:The effects of industrial gases on the environment are many and
have far-reaching consequences. The most notorious and notable effects include
global warming, ozone layer depletion, acid rain, ocean acidification and soil
pollution.
·
Effects on the
surrounding community:The gases may also affect the community living
close to the industry. The effects include health problems, blurred visibility,
coughing, and aggravation or complication of medical conditions of individuals
with asthma, lung and heart diseases, and respiratory allergies. Some gases,
particularly sulphur dioxide, are the main cause of acid rain which destroys
the buildings, the soil and harms the animals. This can lead to low
agricultural production and hence famine to the surrounding community.
Particulate matter
·
Effects on employees:The PM
can cause serious health problems to employees which include aggravating
asthma, acute respiratory symptoms such as coughing and difficult or painful
breathing, chronic bronchitis and decreased lung function that can be
experienced as shortness in breathing.
·
Effects on the
environment:The main effects of PM to the environment include reduced
visibility (haze), soiling, and damage to materials. Solid particles,
especially dust, can cover the plant leaves and hence interfere with the
process of photosynthesis.The particles may be carried over long distances by
wind and then settle on the ground or water. The effects of this settling
include making the lakes and stream acidic, changing the nutrient balance in
coastal waters and large river basins, depleting nutrients in the soil,
damaging plants and crops, and affecting the diversity of ecosystem.
·
Effects on the
surrounding community:The PM can deplete the nutrients in the soil
and hence affected agricultural production, leading to a drop in food
production and hence famine. Particle pollution can also stain and damage
buildings and other materials, including culturally important objects such as
statues and monuments.
Liquid waste
Industries produce the liquid wastes that contain toxic and
poisonous chemicals. These wastes are often dumped in water bodies and
sometimes on land. The chemicals contained in industrial wastes may include
lead, mercury, sulphur, asbestos, nitrates and many other harmful substances.
·
Effects on employees:The
harmful liquid waste may cause skin diseases or burns if they come in contact
with the skin. When they are accidentally ingested or if they get into the body
through wounded skin, they may poison the body and can even cause death.
·
Effects on the
environment:Untreated liquid industrial waste may pollute water bodies and
the land, and harm living organisms. When damped in water, they can poison fish
and other marine flora and fauna. The chemicals can also pollute the soil and
consequently destroy soil properties, kill beneficial soil microorganisms, and
poison the crops.
·
Effects on the
surrounding community:The industrial chemicals can pollute the soil
and make it unproductive, so this can limit or stop agricultural production.
The crops grown on a soil polluted with chemicals can absorb the chemicals,
which may get incorporated in plant bodies. When man eats such crops, the
chemicals can pass into his body and affect him adversely.The chemicals can
pollute drinking water sources, thus rendering the water unwholesome for community
consumption and commercial uses. If people use the water from polluted water
bodies the chemical in water may harm their health in one way or another. It
can also kill fish and other marine life due to chemicals dumped in water.
Noise
Industries produce a lot of noise which can have adverse effects
on the environment and the community.
·
Effects on employees:Prolonged
exposure of employees to loud noise may cause loss of hearing and give rise to
rapid ear damage. Noise can not only cause hearing impairment but it also acts
as a causal factor for stress and headache. It is also known to cause blood
pressure. Additionally, it can be a causal factor in employee accidents both by
masking hazards and warning signs, and by hindering concentration.
·
Effects on the
environment:Loud noise may cause migration of animals from a certain area
and hence result in the imbalance of ecosystem. Intense vibrations caused by a
loud noise may loosen the soil, making it vulnerable to soil erosion agents.
·
Effects on the surrounding
community:Noise can cause loss of concentration and hearing to people
living close to industries.The loud noise also interferes with people’s sleep
making them less productive. It also makes it difficult for people to hold
talks as they have to use a lot of energy to shout so as to hear and understand
each other. It may also lead to poor health in young children by interfering
with their normal sleeping routines.
Ways of
reducing industrial pollution
1. Industries
should be located far away from residential areas.
2. All
industrial wastes must be thoroughly treated before being dumped into water
bodies. Doing so will reduce or even eliminate the possibility of harming
aquatic life, people or polluting the soil.
3. Recycling
of industrial wastes should be emphasized.
4. Using
energy-efficient combustion engines so as to minimize the release of harmful
gases to the environment.
5. Lubrication
of moving parts of machinery should be done timely and effectively in order to
reduce the amount of noise produced. Employees should use ear plugs (ear muffs)
to protect their ears from damage by extreme noise during work.
6. The
government should formulate policies that govern sustainable industrial
production without causing environmental pollution, and any industry violating
the rules should be fined heavily or even get closed altogether.
7. Developing
and using alternative energy sources such as solar energy and wind power which
do not pollute the environment.
Focal Studies
The Production of Cars in Japan, Electronic Equipment in South
Korea and Textiles in Tanzania
Explain
the production of cars in Japan, electronic equipment in South Korea and
textiles in Tanzania
Japan
is a chain of islands located in eastern Asia between North Pacific Ocean and
the Sea of Japan. Its major islands are Hokkaido, Honshu (the largest and most
populous), Kyushu and Shikoku
Japan
is one of the world’s industrialized countries. It is one of the leading
countries in car manufacturing in the world. The Japanese automobile industry
is one of the most prominent and largest industries in the world. Japan has
been in the top three among the most car manufacturing countries in the world
since 1960, surpassing Germany.
The
country is the home to a number of companies that produce cars, construction
vehicles, motorcycles, all-terrain vehicles (ATVs), and engines. Japan
automobile manufacturers include Toyota, Honda, Daihatsu, Nissan, Suzuki,
Mazda, Mitsubishi, Subaru, Isuzu, Kawasaki, Yamaha and Mitsouka.
The
automobile manufacturing process involves making car parts and then assembling
the parts to form a complete car (unit). The manufacturing of car parts is done
by other companies using designs provided to them by the car manufacturer.
After
assembling the parts, the car engines are tested, followed by painting of the
complete cars. Most of these activities are performed by robots and other
machines under the supervision of humans.
A number of factors have contributed to growth of car
manufacturing in Japan. The factors include the following:
·
Adequate capital:Car
manufacturing companies have been conducting this business over a long period
of time, so they have grown big financially and have attracted many financial
institutions to lend them the capital they require to expand and extend their
business. By the way, Japan is a rich country with a very stable economy. This
has enabled it to finance the automobile industry adequately.
·
Advanced technology:Japan
has an advanced technology in car manufacturing and this technology has been
advancing with time. Computerisation and use of robots has improved production
efficiency. Research in automobile technology is being conducted in order to
come up with better methods of production and new car models.
·
Accessibility:Japan’s
location makes it accessible from all directions by sea. As such, ships that
bringing in raw materials and ships transporting finished products from the car
manufacturing industries anchor and set sail from Japan’s ports.
·
Market availability:Japan’s
manufactures produce very durable, reliable, and popular cars. Thus, their cars
are sold in many countries due to their relatively low cost of purchase and
maintenance. This has provided car manufactures with a wide market. However,
its car market has decreased slightly in recent years, particularly due to old
and new competition from South Korea, China and India. Still, automobile export
remains one of the country’s most profitable exports.
·
Availability of labour:Japan
has a large number of qualified and skilled personnel to work in the automobile
industry. Though robots and other machines are also used in production, humans
still remain the main workforce. Availability of considerably cheap labour
tends to lower the cost of production and maximise profit. This is the reason
cars made in Japan are affordable to many buyers, including the very poor
African and Asian countries.
·
Good infrastructure:Japan
has very advanced and well maintained infrastructures, which undergoes regular
upgrading and expansion. These include roads, modern railways systems, canals,
seaports, and airports.
·
Adequate energy
resources:Car manufacturing industries need a lot of power. Japan has got
numerous hydroelectric power stations, coal, and nuclear energy reactors, among
other sources, that provide the energy required to operate its industries.
·
Commitment and
hard-working spirit:The Japanese are hard working people; they are
committed in their jobs and the development of their country. This spirit has
boosted their car manufacturing industry as well as other industries
The
electronic equipment industry in South Korea
South
Korea is located in East Asia, on the southern half of the Korean Peninsula.
The only country with a land border to South Korea is North Korea. South Korea
is mostly surrounded by water. To the West is the Yellow Sea, to the South is
the East China Sea, and to the East is the Sea of Japan.
Although
South Korea’s political scene has experienced a lot of instability, its economy
has grown rapidly to become one of the best in the world. This has been geared
(spearheaded) by its giant electronic industry, a light industry that produces
products such as television sets, radiocassette recorders, microwave ovens,
radios, watches, computers, video tapes, calculators and memory cards, among
many others. The leading manufacturers of electronics in South Korea include
Samsung and LG.
A number of factors have led to growth and development of South
Korea’s electronics industry. These factors include the following:
·
Adequate labour:South
Korea has a large population of skilled and experienced labourers who work in
the electronic industry. Because the industry is based on research and
development, students are encouraged to take science subjects in schools and
colleges, ensuring the modelling of future engineers, scientists and technical
traders.
·
Availability of capital:The
giant electronic companies in South Korea have so far accumulated much wealth
to invest in research and development of the electronic industry. Furthermore,
the companies are trusted by big financial institutions which are ready and
willing to borrow them whenever they need capital. The government’s financial
support is also at the maximum.
·
Advanced technology:South
Korea has kept up with the changing trends in electronics technology. Indeed,
in some areas, South Korea has set the standards in new technology. This has
given its electronic industry an edged over other electronic manufacturers.
·
Improved research:Research
in electronics industry to come up with improved and modern products is very
crucial in the development of the electronic industry in South Korea. A lot of
the fund is injected into research to design high quality products to meet the
changing market demands as well as liaise with stiff competition from other
countries like China, Japan and North Korea.
·
Availability of market:South
Korea is one of the most populous countries in the world. So there is a wide
internal market for some of the products while a big portion is exported.
Electronic products are always on high and persistent demand due the dynamic
nature of electronics technology.
·
Affordability of the
products:The electronic products from South Korea are of high quality but
affordable. This makes them popular around the world, hence highly marketable.
·
Government support:The
government of South Korea is very supportive to the electronics industry
through laying down policies and business-friendly environment, which has
promoted the growth and development of the industry. The government also
provides financial support in areas like research and development. This has
encouraged investment in the industry.
·
International relations:South
Korea has a good relationship with many countries in the world. This has
attracted many countries to become trade partners with South Korea, hence
expanding markets for its electronic goods.
·
Well developed
infrastructure:South Korea has well development transport and communication
infrastructures which include an extensive network of railways, roads, seaways
and airways that criss-cross the country. Thus, the raw materials and finished
goods are transported easily. This makes the export of raw materials
cost-effective.
·
Availability of energy:South
Korea generates power through various means. These include nuclear power, which
accounts for 45% of the total power production. The other energy sources are thermal
and hydroelectric powers. Energy for use in electronics industry is abundantly
available and affordable.
The
textile industry in Tanzania
The
Tanzania textile industry was developed in 1970s as part of the government’s
efforts to industrialize the economy. More than thirty textile mills, most of
them owned by the government, were established and were operational throughout
the 1980s.
Prior
to economic reforms of early 1990s, the textile sector was thriving well. But
faced with the withdrawal of government support, removal of trade barriers, and
international competition, it soon the textile industry collapsed. Industries
such as Mbeya Textiles, Musoma Textiles, and Mwanza Textiles went out of
operation.
Manufacturing
plants were sold off by the government to private investors, who have rebuilt
the industry since the early 2000s. Much of the equipment bought at this stage
was antiquated and inefficient, making it difficult for these companies to be
internationally competitive; a major constraint they face up to the present.
Indeed,
where companies have upgraded or replaced their equipment, it has inevitably
been second- or third-hand, and for the most part globally uncompetitive,
leaving the industry under great pressure and at considerable risk.
The collapse
of the textile industry was due to inadequate supply of cotton lint, lack of
power/power interruptions, high power tariffs, unfair competition from imports,
and devaluation of Tanzania shilling, hence making it difficult to buy spare
parts for the machines.
Today
the textile industry is owned and operated by the private textile companies.
Currently, there are 59 industries located in different parts of the country,
36 of which are based in Dar es Salaam. A few of these industries are those
that were privatized by the government.
The
government of Tanzania is trying hard to create a favourable investment climate
for the textile industry, but the sector is still performing poorly and hence
not contributing significantly to the country’s economy. Homemade textiles are
of poor quality but very expensive as compared to those imported from other
countries. As a result, most buyers have turned their attention towards
purchase and use of second-hand clothes (mitumba) which
are durable but affordable.
Problems
facing the textile industry in Tanzania
·
Outdated machinery:The
machinery in most of the textile-manufacturing industries is old. Therefore,
the final products manufactured by these industries are of low quality and thus
not competitive in the market, both locally and internationally. These machines
also have limited capacity which, in turn, limits production.
·
High cost of power:The
cost of power in Tanzania is considerably higher compared to other countries.
This leads to high production costs and, consequently, high prices for textile
products. Given that the products are generally poor, they are hence hardly
sellable.Through power is very costly, it is also not supplied adequately and
persistently mainly because of obsolete transmission system, drought and high
oil prices, among others. This problem discourages many investors who would
like to invest in the textile industry.
·
High cost of spare parts:The
cost of spare parts for textile machinery is very high. Sometimes these spare
parts are not available in the market because the technology is old and
outdated. Most manufactures have stopped manufacturing such spare parts. In
addition, carrying out repairs for textile machinery is a very expensive task.
·
Lack of skilled labour:The
lack of skilled labour in Tanzania prompts dependency on imported labour and
skills which are very expensive. Sometimes when machinery breakdown occurs, the
operation has to be halted until the imported skilled labour is available to
fix it. This leads to stoppage of production and hence, financial losses.
·
Competition:The
industry faces tough competition from second-hand clothes, known as mitumba, and high quality clothes
imported from other countries. Due to this reason, the existing small market
has considerably diminished the textile market even further.
·
High taxes:Tanzania
is one of the countries with many meaningless taxes. The high taxes levied on
the textile industry by the government leads to low profits, a heart-breaking
challenge to investors.
·
High cost of
chemicals: he chemicals used in the textile industry, such as sulphuric
acid, are imported from abroad using the foreign currency. This, plus other
reasons, makes the textile industry unprofitable and thus a difficult business
to operate. Imports add highly to operation costs in the textile sector.
·
Low capital:Many
textile industries operate with limited capital which greatly curtails their
abilities to increase production capacity, improve their machinery, or purchase
raw materials and industrial chemicals.
·
Poor infrastructures:Tanzania
is among the countries with very poor transport and communication
infrastructures. The poor state of infrastructures means increased transport
cost of raw materials from production areas and finished goods from industries
to consumers. High production costs lowers the profit margin and hence the
capability of industries to operate in a sustainable manner.
·
Poor management:The
development of the manufacturing industry was previously hampered by poor and
horrible management practices. The rate of corruption and poor management is
still rampant in this country, a fact that makes it hard for companies with big
financial muscles to come and invest in Tanzania in various sectors of the
economy.
Ways of
encouraging the development of the textile industry in Tanzania
1. The
government should support the industry financially, which can be done by
offering soft loans to companies that are involved or interested to invest in
the textile sector, or through buying shares in these companies. The government
could also fund researches on the development of the textile industry.
2. The
government should come up with favourable policies which encourage the growth
and development of the textile industry. This may include reviewing tax rates
and power tariffs, as well as reviewing policies on importation of second-hand
clothes from abroad. It should also consider the possibility of exempting taxes
on materials imported for textile manufacturing.
3. There
is need to improve the production technology to enable production of quality
textile products which will be easily marketable. Alternatively, the outdated
industrial machinery should be replaced by the new modern machinery that
produces high quality and up-to date textile products.
4. Market
researches should be conducted tirelessly, aiming at development of new
products and finding alternative and cheap means of production. The new
products will help boost and push the industry forward.
5. Labour
should be trained well about textile technology and production. This can be
achieved through introducing textile production courses in vocational colleges
and in schools and universities.
6. The
government and other stakeholders should improve transport and communication
infrastructures so as to reduce the production costs incurred for transporting
the textile products and raw materials.
7. The
government has relaxed the regulations on importation of raw materials and
exportation of goods abroad. This has enabled stakeholders in the textile
industry to export their products timely and without incurring high costs.
8. Tanzania
is a member of regional organizations, such as the East African community
(EAC), and the Southern Africa Development Communality (SADC). Therefore,
Tanzania’s textile industry benefits significantly from this combined market of
about 150 million people. Market availability will automatically boost the
textile industry.
Lessons from Japan and South Korea Industries for Tanzania
Identify
lessons from Japan and South Korea industries for Tanzania
Lessons for Tanzania
1. The
various industries in South Korea and Japan are well managed. For this reason,
they perform well and make profits. The management set objectives that they
work hard to achieve. They are not involved in corruption scandals,
extravagance or misuse of company resources. Likewise, for Tanzania’s textile
industry to develop and grow, good management practices must be encouraged.
2. The
well developed transport and communication infrastructure in South Korea and
Japan play a big role in the development of industries. Thus, well developed
infrastructures are necessary for industrial development. This is because it
facilitates the movement of goods and raw materials efficiently. To boost the
textile industry in Tanzania, the government should also put more efforts on
the improvement and development of infrastructure so as to hasten the movement
of raw materials and finished products. This will help to minimize the
production costs and hence encourage more people to invest in the industry.
3. Japan
and South Korea industries put more emphasis on research and development of
products and technology. Tanzania should likewise, invest more on research and
come up with new and advanced products that will attract the market.
4. South
Korea and Japan have invested a lot in training and development of labour, so
Tanzania should do the same. This will ensure constant supply of killed labour
to support the growth and expansion of industries in the country.
5. The
Koreans and Japanese are very hard-working people and they are seriously
committed to their jobs. This is the reason why their industries produce more
products of high quality. Tanzanians should adopt this working spirit. There is
no short-cut or miracles to success except hard work and commitment. Tanzanians
should also work hard and in a committed way, if at all, they want to achieve
their goals in industrial growth and development.
6. Just
like Japan and South Korea, the government of Tanzania should also formulate
policies that favour growth and development of industries. The government may
also fund technical activities such as research as well as negotiating
favourable trade agreements with other countries to provide a market for its
industrial products.
7. The
industrial products from both South Korea and Japan are of high quality and can
be sold in any country in the world. Industries in Tanzania should follow in
similar steps by producing goods that meet international standards. This can be
achieved by producing quality and affordable products.
8. Japan’s
and South Korea’s industries keep up-to-date with development and technology.
That is, they produce goods that match with changes in technological
advancements and customers’ demands. They produce advanced and competitive
goods. Tanzania’s industries should do the same.
9. Japan
and South Korea exploit different energy resources which include nuclear
energy, thermal energy, coal and hydroelectricity. Tanzania should also harness
different energy resources instead of depending heavily on hydroelectricity
which is unreliable and yet expensive. The government should invest on
generation of electricity from coal (at Kiwira) and natural gas (at
SongoSongo). This will make energy more cheap and available to industries
cheaply.
SUSTAINABLE USE OF POWER AND ENERGY
RESOURCES
Power and Energy
Power and Energy
Define
power and energy
Energy
is the capacity for doing work. You must have energy to accomplish work. Power
is the rate of doing work or the rate of using energy. Therefore, you need
energy to produce power. Without energy there is no power that can be produced.
Major Sources of
Power
The Major Sources of Power and Energy
Identify
the major sources of power and energy
Energy
sources can be sub-divided into two broad categories. These are renewable and
non-renewable energy sources. Renewable
sources are those that do not get finished or used up since they are
naturally replenished. These include sunlight, water, geothermal steam, wind
and biomass.
Non-renewable sources are
those that can get finished or used up through use, that is, they cannot be
replaced once used up. They include coal, petroleum, natural gas, groundwater
aquifers, and nuclear energy sources such as uranium and plutonium.
The Origin of Different Types of Energy and Power Sources
Describe
the origin of different types of energy and power sources
Some of these energy and power sources are discussed in details
below:
·
Coal:Coal is
a fossil fuel that forms when dead plant matter is converted intopeat, which in turn is converted intolignite, thensub-bituminous
coal, after thatbituminous coal, and
lastlyanthracite. This
involves biological and geological processes that take place over a long period
of time. Coal is black or brown in colour.Throughout history coal has been used
as an energy resource, primarily burned for the production of electricity
and/or heat, and is also used for industrial purposes such as refining metals.
·
Sunlight:The sun
is a source of sunlight and all forms of energy on earth. Sunlight can be
harnessed to generate electricity (solar power). This is achieved by using
solar panels which absorbs the solar energy, converts it into electrical energy
and stores it for later or immediate use.
·
Waves and tides:Waves
are generated by wind passing over the surface of the sea, ocean or lake. As
long as the waves propagate slower than the wind speed (just above the waves),
there is an energy transfer from the wind to the waves. Tides are the rise and
fall of sea levels caused by the combined effects of the gravitational force
exerted by the moon and the sun and the rotation of the earth. Tides also
contain substantial amounts of energy. The energy in the ocean waves and tides
can be captured (trapped) to produce mechanical power which is in turn used to
generate electricity.
·
Wind:Wind is
air in motion from low to high pressure region. Wind possesses energy which can
be converted by appropriate devices, into mechanical energy, which in turn can
be used to generate electricity or do any useful work.
·
Water:Water
in motion, such as waterfall or cataract, can be harnessed to generate
hydroelectricity. First, the kinetic energy in running water is converted into
mechanical and then electrical power.
·
Biomass:The
term “biomass” refers to organic matter that has stored energy through the
process of photosynthesis. This can be transferred through the food chain to
the animal’s bodies and their wastes, all of which can be converted into energy
for everyday human use through processes such as combustion.
·
Petroleum (crude oil):Petroleum
is a fossil fuel formed from fossilised remains of plants and animals. When
refined, it produces various petroleum fractions, which are put to various uses
of energy generation. It can be used to power cars and many machines, and
burned to produce heat and light or generate electricity.
·
Natural gas:Natural
gas occurs alongside petroleum. The gas can be burned to generate light and/or
heat and harnessed to generate electricity. For example, the natural gas from
SongoSongo Island in Kilwa is expected to be piped to Dar es Salaam where it
will be used to generate electricity and supplied to homes as liquefied gas to
be used for heating and lighting.
·
Uranium:This is
a radioactive element which produces tremendous amounts of energy upon
disintegration (fission) or combination (fusion) of the nuclei of its atoms.
This energy (nuclear energy) can be used and is being used by many countries in
the world to generate electricity.
Methods of Acquiring
or Extracting Power and Energy
Methods of Acquiring/Extracting Power and Energy
Explain
methods of acquiring/extracting power and energy
Energy and power can be extracted from their sources and put
into various uses. Outlined below are different energy and power resources and
the methods used to extract energy and power from these resources:
·
Coal:Coal is
a combustive black or brownish-black sedimentary rock, usually occurring in
rock strata in layers or veins called beds or coal seams. Coal is considered as
a non-renewable resource because it cannot be replenished on a human
timeframe.The activities involved in generating electricity from coal include
mining, transport to power plants, and burning the coal in power plants. At the
power plant, coal is commonly burned in a boiler to produce steam. The
resulting steam is run through a turbine to generate electricity.Apart from
generating electricity, coal is also burned to produce heat which is used for
various purposes such as domestic heating and in industrial furnaces. During
the Industrial Revolution, coal was mainly used to raise steam which was used to
power machinery, steam ships and locomotives.
·
Petroleum:Petroleum
is a naturally occurring liquid found in rock deep in the ground. This liquid
consists of a complex mixture of hydrocarbons of various molecular weights,
plus other organic compounds.It is generally accepted that oil is formed mostly
from the carbon-rich remains of ancient plankton after exposure to heat and
pressure in the earth’s crust over hundreds of millions of years. Overtime, the
decayed residue was covered by layers of mud and silt, sinking further down
into the earth’s crust and preserved there between hot and pressured layers,
gradually transforming into oil reservoirs.After mining, petroleum is
transported to a petroleum refinery where the mixtures of hydrocarbons that
constitute the petroleum are separated and put into various uses. Some of these
hydrocarbons (fractions or products) include petrol, diesel, fuel oil,
kerosene, refinery gas (jet oil), etc.The energy from petroleum products is
tapped mainly by burning. The burning produces heat energy that is used for
heating, lighting or doing some mechanical work (such as powering machinery,
vehicles, etc). For example, fuel is burned in a furnace or boiler for
generation of heat that is used in an engine for generation of power. Petroleum
products can also be burned to generate electricity.
·
Natural gas:Natural
gas is fossil fuel formed when layers of buried plants, gases and animals are
exposed to intense heat and pressure over thousands of years. The gas is often
found in close proximity to and with petroleum. Natural gas is a hydrocarbon
gas mixture consisting primarily of methane, but commonly includes varying
amounts of other higher alkanes and even a lesser percentage of carbon dioxide,
nitrogen, and hydrogen sulphide.Natural gas is mined from deposits deep
underground and brought to the surface. Before the gas can be used as a fuel,
it must be processed to remove impurities, including water, to meet the
standard of a marketable natural gas.Energy from the natural gas is extracted
through burning of the gas. This burning produces heat energy which is used for
heating, cooking and electricity generation. The gas is also used as fuel for
vehicles and as a raw material in the manufacture of plastics and other
commercially important organic chemicals.
·
Water:The
potential energy of dammed or flowing water can be converted into storable
electrical energy. Harnessing the flowing water to power machines and
mechanical processes is one of the oldest methods of power generation that is
used until today.The energy in water may be tapped naturally or artificially.
Naturally, flowing water at waterfalls runs through turbines, which generate
electricity. River water may also be used to run milling machines.
Artificially, water may be lifted to higher points such as tanks or dams where
it drops in mass, turning the turbines to generate electricity.
·
Biomass:Biomass
is biological material derived from living things, or recently living
organisms. It mostly refers to plants or plant-based materials. As an energy
source, biomass can either be used directly via combustion to produce heat or
indirectly after converting it to various forms of biofuel. The biofuel can
then be burned to release heat energy that is used to power machines or for
heating purposes.Wood is burned directly to produce heat and/or light. Wood
remains the best biomass energy source to date. Examples of wood include forest
residues (such as braches, dead trees and stumps), yard clippings, wood chips,
and even municipal solid wastes.Biomass also includes plant or animal matter
that can be converted into fibres, or other industrial chemicals, including biofuels.
For example, gasohol is a biofuel derived from a mixture of alcohol (from sugar
cane) and petrol. This is used as a fuel to run cars and machines.Rotten
garbage and agricultural and human waste under controlled conditions can
release biogas that can be used for heating, cooking and lighting.
·
Uranium:Uranium
is a radioactive element. The energy from uranium is extracted through nuclear
fission or fusion. Nuclear fission involves splitting of an atom while nuclear
fusion involves combining two light atoms. The most commercially exploited
process is nuclear fission, when the atoms and nuclei of this radioactive
element split in nuclear reactors. The process releases a large amount of
energy in the form of heat. The heat released is used to boil water into steam,
which is, in turn used to turn turbines to generate electricity.
·
Solar energy:Solar
energy refers to energy from the sun. This energy can be tapped and used for
different purposes. Solar energy is tapped by devices called solar panels. The
energy is absorbed by the panels and converted into electrical energy that can
be used immediately or stored for later use. The trapped energy can be used to
light homes and power gadgets such as phones and calculators. The heat from the
sun can also be tapped directly like when it is used to dry crops or clothes.
·
Geothermal steam:The
geothermal power from geothermal steam is extracted by directing it to run
machines that produce electricity. Its heat can also be tapped by placing the
material to be heated over the hot steam.
·
Wind energy:The
kinetic energy of wind is harnessed by turning windmills, which generate
electricity. Each of the several wind mills is supplied with a cable which is
used to supply electricity to the main cable which then directs electricity to
homes, industries etc. The electricity generated can be used for cooking,
lighting and running machines. Wind energy may also be tapped by putting up
sails to propel water vessels such as dhows.
Importance and Use of
Power and Energy Resources
The Use and Importance of these types of Power Resources
Explain
the use and importance of these types of power resources
Power and energy resources are important in two ways. First, it
is through the energy and power they produce and secondly, due to their own economic
value.
1. Industry:The power and energy
resources generate energy and power that is used to generate electricity to run
machines and produce heat for heating, cooking, lighting, welding etc. This
leads to industrial development and hence economic growth.
2. Agriculture:Power and energy
resources produce energy and power that is used to run agricultural machinery
such as tractors and harvesters. These machines are mainly powered by petrol
which is a product of petroleum. The use of machines in agriculture increases
agricultural production and hence the living standards of the farmers.
3. Environmental conservation:The use
of solar, wind, biogas and energy helps to conserve the environment because the
extraction and use of these power and energy resources is not associated with
environmental pollution. This helps to keep our environment clean and also
prevents the occurrence of negative effects brought about by environmental
pollution. Also the use of wastes such as municipal wastes for generation of
biogas helps to clean the environment directly. Furthermore, the use this clean
form of energy instead of cutting down trees to get firewood help conserve the
environment.
4. Transportation:Transportation sector
involves the use of motor vehicles, ships, aircrafts, etc, all of which are
powered by petroleum products. Transportation, apart from facilitating the
movement of people, goods and services from one place to another, also helps in
economic growth and development.
5. Mining:Most forms and kinds of machinery that are
used in mineral prospection, extraction, and processing use power and energy
generated from fossil fuel. Therefore, the fuel energy helps in the development
of the mining industry.
6. Social services and amenities:Most
social services and amenities are facilitated by energy and power. For example,
sports, games, schools, healthcare, and homes depend on power and energy in
different ways. People use energy to cook, heat, light homes, and power electronic
devices that they use daily. This helps to simplify work and create joy and
refreshment, hence making life easy, pleasurable and enjoyable. The
availability and constant supply of energy and power, therefore, plays a vital
role in improvement of the living standards.
Energy and power sources have the following direct economic and
social importance:
1. Source of employment:Many people are employed
directly in the extraction, harnessing, transmission and sale of energy and
power. All of these activities involve a great deal of manpower. Some of the
people employed in the industry include miners, researchers and scientists,
solar equipment installation technicians, electricians, and many others.
2. Source of foreign exchange:The
extraction and sale of energy resources or energy and power earns courtiers the
foreign exchange. This includes sale of technology or expertise and equipment
to the needy countries, all of which are paid for in foreign currency. For
instance, countries that export energy resources such as coal and petroleum or
energy like electricity, earn foreign exchange. This increases their foreign
exchange reserves and enables them to participate competitively in
international trade.
3. Source of government revenue:The
taxes that are charged on energy-related export earn revenue to respective
governments. Some governments are also directly involved in the energy and
power business, thereby directly earning revenue from these resources.
4. Improvement of transport and communication infrastructure:The
movement of energy and power resources or their products (power and energy)
requires laying infrastructures such as roads, railways, ports and airports in
order to fully exploit these resources. This helps to improve the
infrastructures which also benefit the general community.
5. Promotion of trade and other industries:The
industries that rely on energy and power or resources are sure of continuing
with their production so long as the energy and power are available. Therefore,
this promotes industrial development as well as sale of goods and services
produced by the respective countries. For instance, the industries that
manufacture solar panels and electrical equipment benefit a lot from the power
and energy industries which are the main users of their products.
Problems Facing Power
and Energy Production
The Problems Facing the Process of Power and Energy Harnessing
Discuss
the problems facing the process of power and energy harnessing
Power and energy production endeavour is faced by a number of
problems which include the following:
1. Changing climatic conditions:Drought
leads to rainfall scarcity and hence a drop in the volume of water in rivers.
This problem affects the production of hydroelectric power and is one of the factors
leading to low energy production in most parts of the world, especially in the
least developed countries.
2. Lack of capital:Energy and power
production needs heavy investments in infrastructure, manpower and technology.
All these investments require a great deal of capital. Inadequate capital leads
to low investment and, therefore, low production of power and energy.This
problem especially affects developing countries which fail to meet enormous
costs involved in setting up energy and power generation facilities. These poor
countries normally depend on unreliable hydroelectric power as they lack
adequate innovation and technology to establish different energy generation
projects.
3. Lack of diverse energy sources in respective countries:Most
counties have very few energy resources from which to extract power and energy.
Worse still, some do not have a single energy resource, so they have to import
the resources or power. For instance, uranium and geothermal steam are not
found in many countries. Such countries extract power from only a few available
resources such as water, wind or solar energy.
4. Poor technology and lack of skilled personnel:Many
developing countries lack the technology required to establish energy
extraction infrastructures and the skilled personnel needed to perform that
function. Most of the power and energy exploitation technology used in
developing countries is very old and less efficient and productive. There are
also very few people with the necessary skills for setting up and operating
equipment as well as conducting research on power and energy production
methods, facilities and technologies.
5. High prices:High prices for energy
resources hinder energy and power output in most countries that have to import
these resources from other countries. Oil is used for energy production. We
have recently seen escalating oil prices worldwide. This leads to low purchase
and hence low energy and power production. Also the equipment needed for
production of energy and power is very expensive and can thus not be afforded
by many poor countries. As a result, they resort to inefficient and less
productive obsolete technology which cannot produce sufficient power and energy
to meet the ever-increasing demand for energy and power.
6. Environment pollution:Energy and power
exploitation is sometimes accompanied with the emission of harmful gases that
pollute the environment. Coal burning, for example, releases tremendous
quantities of carbon dioxide gas into the atmosphere. As such, many countries
are either phasing out such energy generation technologies or spending a lot of
capital to clean the coal so as to prevent environmental pollution. The power
and energy production sector is, therefore, in great pressure to adopt
technologies that minimize or cause no environmental pollution.
7. Siltation:Accumulation of silt in
dams used for generation of hydroelectric power reduces the volume of water in
dams, hence resulting to low power generation. On the other hand, removal of
the silt from dams adds to the cost of energy and power production and these
costs are pushed on to consumers of energy and power.
8. Scramble for resources:River water is also used
for irrigation of crops, domestic and industrial uses, fishing or preservation
of flora or fauna. For example, river Nile is used for irrigation in Ethiopia
(Gezira Irrigation Scheme) and, at the same time, required for production of
hydroelectric power at Aswan High Dam, in Egypt. If too much water is used for
irrigation, little will be available for hydropower generation. This
competition on the same resource can lead to international conflicts and even
wars.Another example is coal which is used for domestic heating as well as for
generation of electricity. This can curtail the generation of power and energy
from coal if too much of it is used for domestic heating.In Tanzania, peculiar
species of toads are found at Kihanzi power generation station in Kihanzi
River. Use of water for generation of hydroelectricity affects the lives of
these organisms. This has caused a big concern from environmentalists and
wildlife conservation groups.
Ways of Addressing Power and Energy Harnessing
Suggest
ways of addressing power and energy harnessing
Ways to address the
problems facing power and energy production include the following:
1. The
silt accumulating in dams should be dredged regularly in order to keep the
volume of water constant. This will maintain the capacity of energy and power
generation.
2. Any
form of environmental pollution likely to cause global warming and reduction in
amount of rainfall should be avoided. People should not cut down trees
indiscriminately as this can lead to drought and hence reduction in volumes of
rivers needed for generation of hydroelectricity.
3. Countries
should diversify their energy generation sources in order to escape the effects
caused by such problems as escalating oil prices and climate change.
4. Developing
countries should phase out the old energy and power generation technologies and
instead adopt the new ones so as to cope with technological advancements to
ensure that their energy generation is efficient and highly productive.
5. Research
should be carried out often in order to improve energy and power production, as
well as come up with new production methods. Research will also help in finding
power and energy production methods that cause less or no environmental
pollution.
6. The
governments should train their people the courses related to energy and power
generation at schools, colleges, and universities so as to make them
professionally competent in the field of energy and power generation.
7. Countries
should set aside enough funds to be used for energy and power generation
because success in this sector can boost the growth and development of other
sectors. Dormancy in energy and power sector can hinder industrial development
and cause the country’s economy to drop down.
Focal Studies; Solar
and Wind Power in U.S.A Hydroelectric Power and Biogas in Tanzania
The Importance of Power and Energy Resources in the Focal
Countries
Evaluate
the importance of power and energy resources in the focal countries
The USA
is a technologically advanced country with a huge and very stable economy. It
is a developed and heavily industrialized country with a great demand for power
and energy required by its industries and its large population
These
and other factors have contributed to development of various power production
resources. Solar and wind are among the diverse power resources in the USA.
Solar
Power
The
U.S. is among the top countries in the world in electricity generated by the
sun and several of the world's largest small-scale installations are located in
the desert Southwest. Solar powerincludes small-scale solar power plants as
well as local distributed generation, mostly from rooftop solar panels. The
United States conducted much early research in solar devices and concentrated
solar power. There are plans to build many other large solar plants in the
United States. Many states have set individual renewable energy goals with
solar power being included in various proportions.
Solar power accounts for about 1% of the total national
generation capacity. It is mainly exploited in the sunny areas of the country
which include Nevada and California states.
Rooftop solar panels
Wind power
Wind power is a branch of the energy industry expanding quickly
over the last several years.
U.S. Wind Generation (KW) by Year
Wind
power accounts for 4% the total energy produced in the USA. Texas is firmly
established as the leader in wind power development, followed by Iowa and
California.Wind power is used to run farms, industries and for generating
electricity that is fed to the national grid.
The
importance of solar and wind power in the USA
1. Source of employment:Solar and wind energy
industry is more labour-intensive. The industry supports thousands of people in
the USA. The wind energy industry employs many Americans in a variety of
capacities, including manufacturing, project development, construction and wind
mill installation, operations and maintenance, transportation and logistics;
and financial, legal and consulting services.The solar energy industry employs
people in jobs including solar panel installation, manufacturing and sales.
2. Industrial development:The energy and power
generated from resources such as coal, uranium, petroleum and water are very
expensive compared to wind and solar energy. The abundance and availability of
cheap energy from wind and sunlight promotes industrial development.
3. Agricultural development:Wind and solar power is
commonly used in large farms to supply electricity required for such activities
as pumping water, lighting and heating. This has, in turn, promoted large-scale
agriculture in the country.
4. Conservation of non-renewable energy resources:Depending
on renewable energy sources such as wind, solar and hydroelectricity for power
and energy generation helps to conserve the non-renewable energy sources such
as gas, coal and petroleum. This ensures that these non-renewable energy resources
do not run out or become exhausted soon. They are conserved for future uses
instead.
5. Reduced environmental pollution:Exploitation
of non-renewable energy resources, such as petroleum, coal, and wood, releases
harmful gases to the atmosphere which pollutes the environment. Harnessing and
use of wind and solar energy do not pollute the environment. Thus, generating
sufficient power and energy from these resources will help reduce environmental
pollution that could otherwise result due to dependence on non-renewable
resources.
6. Improved standard of living:People
employed directly and indirectly in the wind and energy industry earn cash
which they spend on their daily needs as well as other amenities.Solar and wind
energy is cheap and hence affordable to many Americans. So, people who had no
access to the costly hydroelectricity and thermal electricity are now able to
use this cheap power and energy. This has helped improve their living
standards.
7. Development of other sectors of economy:Growth
in power and solar industry creates positive multiplier effects. For example,
industries in the renewable energy supply chain, such as those manufacturing
windmills and solar panels, will benefit. The growth of industries involved in
the manufacture of wind and solar energy equipment depends on the growth and
existence of the solar and wind generation industry.Also local businesses will
benefit from increased household and business incomes.
8. Generation of revenue:Local governments collect
property and income taxes and other payments from energy project owners. These
revenues can help support public services, especially in rural communities,
where projects are often located. Owners of the land on which wind projects are
built also receive lease payments as well as payments for the rights to
transmit electricity through their land. Also they may earn loyalties based on
projects’ annual revenues.
9. Stabilisation of energy prices in future:Wind
and solar energy is providing affordable electricity across the country right
now, and can help stabilize energy prices in future.The costs of solar and wind
energy technologies have declined steadily, and are projected to drop even
more. For example, the average price of a solar panel has dropped
significantly. The cost of generating electricity from wind is also declining
gradually.The wind and solar energy projects require initial investments to
build but once established they operate at very low costs and to most
technologies the fuel is free. As a result renewable energy prices are relatively
stable over time.
10. Diversification of energy supplies:Using
more wind and solar energy can lower the prices and demand for natural gas and
coal by increasing competition and diversification of energy
supplies.Generation of energy from different resources ensure that the supply
is not interrupted in case one resource is finished or exhausted. This ensures
constant availability of power and energy. Therefore, wind and solar energy
helps to diversify the energy supply in the country.
11. Reliability and flexibility:Wind
and solar energy supplies are less prone to large-scale failure because they
are distributed and modular. Distributed systems are spread out over a large
geographical area, so a severe weather event in one location will not cut off
power to an entire region. Modular systems are composed of numerous wind mills
or solar panels. Even if one of the equipment is damaged the rest can typically
continue to operate.
12. Sustainability:For as long as the sun
shines and the wind blows, the energy produced can be harnessed to send power
across the grid.
The Problems Facing Power and Energy Harnessing in Focal
Countries
Summarize
problems facing power and energy harnessing in focal countries
Problems
facing solar and wind power in the USA
1. Generation
of wind and solar power depends on prevailing weather conditions. In case of
little or no sunshine due to prolonged cloud cover or if there is very low wind
speed, then very little power will be generated. This, in turn, leads to generation
of little amount of electricity which cannot meet the demand of all consumers.
2. People
are still reluctant to change from dependency on the traditional energy
sources, such as hydroelectricity. They are, therefore, slow in adopting the
use of solar and wind power, thus hindering fast development and growth of the
industry.
3. The
cost of installation of equipment for generating wind and solar power on a
large-scale is very high. This has led to limited investment in the industry.
4. The
cost of leasing land for building wing energy projects is very high. The
problem has made many companies reluctant to establish wind power projects.
5. The
industry is facing stiff competition from other sectors of energy and power,
such as coal power, hydroelectric power, and geothermal power.
6. Unequal
government subsidies and taxes. Nuclear and fossil fuel technologies enjoy a
considerable advantage in government subsidies for research and development,
compared with wind and solar energy counterpart which do not get any government
subsidies. In addition to receiving subsides, conventional generation
technologies have a lower tax burden.
7. Wind
and solar power developers may have difficulty obtaining financing at rates as
low as may be available for conventional energy facilities.
8. Good
wind sites are often located in remote areas, far from the cities where
electricity is needed most. Transmission lines must be built to bring the
electricity from the wind farm to the city. This increases the cost of
generating and providing electricity.
9. Wind
resource development may not be the most profitable use of the land. Land
suitable for wind mill installation must compete with alternative uses for
land, which may be more highly valued than electricity generation.
HEP and
biogas in Tanzania
Hydroelectric power (HEP)
Hydroelectric
power contributes about 57% of the total power generated in Tanzania. The
electricity supply industry is dominated by Tanzania Electric Supply Company
(TANESCO). The company operates hydropower generation stations which include
Kidatu, Kihansi, Mtera, Pangani, Hale, Nyumba ya Mungu and Uwemba, totalling
561 MW of electricity.
TANESCO
also generates thermal electricity using gas and diesel by plants located in
various parts of the country. There are also independent power plants (IPPs)
which produce thermal electricity from gas and diesel and then sell the
generated power to TANESCO who feeds it to the national grid.
Biogas
Due to
increasing demand for power and dwindling energy resources, there is need to
develop alternative energy sources in Tanzania. One of such sources is biogas,
which is used for heating, lighting, and cooking at homes, schools, hospitals,
etc.
Biogas
is produced by anaerobic digestion with anaerobic bacteria or fermentation of
biodegradable materials such as manure, sewage, municipal waste, plant
material, and crops.
Biogas
technology in Tanzania was introduced in 1975. But it was not until late 2000s
when a study of the biogas sector and how to improve it was conducted. Then the
sector saw improved progress in domestic biogas uptake.
The
government is collaborating with different development partners to improve on
existing technologies and to construct new biogas plants for particularly rural
communities. It is estimated that about 700 biogas plants have been constructed
in Tanzania. Most of these are in rural areas where raw materials such as
livestock and poultry wastes and crop residues are easily and abundantly
available.
Importance
of HEP and biogas production in Tanzania
Hydroelectricity and biogas are very important power resources
in Tanzania. Outlined below are some of the importances of producing these
resources:
1. Hydroelectricity
and biogas industry employs people who carry out energy production activities.
The sector, therefore, serves as the source of employment opportunities to some
Tanzanians. This helps to improve their income and hence the standard of
living.
2. The
hydroelectricity generated in Tanzania is used to power other industries and
sectors of economy. It, therefore, leads to industrial development as well as
other economic sectors in the country.
3. Biogas
generation in rural areas has greatly helped to improve the living standard of
the rural people. Studies have revealed that now women and girls with access to
biogas do not spend much time looking for firewood and hence they can instead
direct their efforts towards participating in other economic activities to
improve family income. It thus saves women and children from drudgery of
collection and carrying of fireweed, exposure to smoke in the kitchen, and time
spent for cooking and cleaning of utensils.
4. The use
of biogas and hydroelectricity has greatly reduced the problem of cutting down
trees for firewood. This has consequently helped to prevent deforestation,
hence ensuring environmental conservation.Conversely, biogas combustion has no
effect to environmental pollution since it produces negligibly very little
pollutants into the atmosphere compared to wood, coal and petroleum. The use of
municipal waste to generate biogas directly assists in cleaning of the
environment and prevention of pollution that could result by dumping of these
wastes on land or into water bodies.
5. Most of
the biogas projects are undertaken by development partners from abroad. This
has helped to improve the relationship between Tanzania and the partners’
mother countries.
6. The
residue of the organic matter left back after biogas has been generated is used
as enriched organic manure, which can supplement or even replace chemical
fertilizers.
Problems
facing HEP and biogas production in Tanzania
1. Unreliable climatic conditions:Hydroelectric
power generation relies on rain-fed rivers and dams. There has recently been
occurring long dry spells which lower the volumes of rivers and dams, thus
curtailing hydroelectricity generation. This leads to power rationing and hence
interruption in economic production.
2. Lack of adequate capital:Generation of HEP and
biogas requires investment in installation of hydropower and biogas plants,
respectively, all of which are hampered by availability of capital. Due to the
country’s sluggish economy, investment in the power and energy sector has not
been successfully implemented. There is lack of enough funds to finance the
establishment of more biogas plants in rural areas. The country relies heavily
on donors and foreign investors to finance the projects.
3. Siltation:The continuous
accumulation of silt in the dams leads to reduction in water volume and hence
low hydroelectricity generation. The problem also leads to increased operation
costs because the silt has to be dredged periodically.
4. Lack of skilled personnel:The establishment and operation of hydroelectric and biogas
plants require skilled personnel. There are very few locals with the required
expertise and professional skills to operate the projects. This has hindered
the construction of hydroelectric and biogas plants in the country. The
production of energy and power from these two sources is thus minimal.
5. Reluctance by the people:People are still
reluctant in adopting the biogas technology. Many people depend on use of wood
as their major source of fuel. This has led to low investment in the industry
and hence low production of the biogas.
Solutions
to problems facing power production
1. The
silt in dams should be removed frequently so as to prevent reduction in water
volume and the consequent drop in production.
2. The
government should invest in other forms of energy generation such as geothermal
and coal power in order to reduce overdependence on hydroelectricity.
3. Establishment
of training institutions to train manpower on energy production technology.
This will help produce skilled manpower to manage the power sector.
4. Power
generation must be liberalized in order to attract investors with sufficient
capital to invest in the industry.
5. Conducting
mass education to educate people to adopt the production and use of biogas.
These can be done through seminars, trade shows and mass media, among other
means. People benefiting from the use of biogas may be invited to convey the
message to those individuals reluctant in adopting the technology.
Solutions to Problems Facing Power and Energy Harnessing in
Focal Countries
Propose
solutions to problems facing power and energy harnessing in focal countries
Solutions
to problems facing solar and wind power in the USA
1. Alternative
sources of energy have been developed to supplement solar and wind power.
2. People
must be taught about the benefit of wind and solar power in order to persuade
them to switch from traditional to modern energy sources.
3. Government
support as well as partnerships has enabled the setting up of power stations
for wind and solar energy exploitation.
4. The
government must provide subsidies to solar and wind research and development as
it is doing to conventional technologies.
Lessons from Countries for Better Harnessing of Power and Energy
Resources in Tanzania
Draw
successful lessons from countries for better harnessing of power and energy
resources in Tanzania
As far as energy production is concerned, Tanzania has a lot to
learn from the USA. The following are some of the lessons that can be adopted
and implemented:
1. In USA,
the energy sector is liberalized, so many private companies are allowed to
generate and sell energy and power. Tanzania should also copy USA’s example by
allowing more private investors to participate in energy and power generation
rather than allowing TANESCO to monopolize the energy production.
2. The USA
has diversified its energy and power industry very well. The country generates
power from different sources, ranging from nuclear to biogas plants. Tanzania
can do the same by using natural gas, coal and uranium discovered in various
parts of the country to produce the highly demanded power to boost her economy.
3. The
government should form agencies to address the generation of solar and wind
energy. There is great potential of wind and solar energy in Tanzania because
of the presence of suitable conditions for harnessing these power recourses.
There is plenty of wind and sunlight in the country to allow sustainable
production of wind and solar energy, which can then be fed to the national grid
to help solve the problem of energy in the country.
4. The
government should support the development of various energy sources by
providing funds to local companies as well as creating favourable investment
conditions to multi-million energy production companies to invest in the energy
generation sector.
5. The USA
uses her own experts to develop the energy industry. Tanzania should also train
her own people so that they can take active part in building energy generation
projects rather than depending on skilled personnel from outside the country.
TRANSPORT
Transport
can be defined as the movement of people, animals, goods or services from one
place to another. It provides a link between different parts of the country,
region or world. People move from one place to another, either permanently or
temporarily for various reasons.
Main Types of Transport
Main Types of Transport System at Global and East African Level
Describe
the main types of transport system at global and East African level
Types or modes of transport refer to the means by which people,
goods, animals or services are moved from one location to another. There are
three broad modes of transport. These include:
1. Land transport:(i) Human transport (ii)
Animal transport (iii) Road transport (iv) Railway transport (v) Pipeline
transport
2. Air transport
3. Water transport
Each of
these types of transport will be discussed in details below.
Land transport
This is
a kind of transport that takes place on land surface. Categories of land
transport include the following:
Human transport
Human
transport or human portage is the transport of people and/or goods using human
muscle power, in the form of walking, running and swimming. This is the old
means of transport that is still used today by majority of the people in
various parts of the world. Human transport involves people carrying light
goods from one place to another. They carry goods on their heads, backs, and
shoulders or hold them in their hands. Sometimes movement of goods can be
enhanced by use of machines such as wheelbarrows, hand carts, or trolleys.
Commercial
human transport, where people, called porters, are paid to carry goods, is
common in less developed countries. Human transport remains popular for reasons
of cost serving, leisure, physical exercise and prevention of pollution (by
refraining from the use of motor vehicles which release fumes that pollute the
environment). It is sometimes the only type of transport available especially
in undeveloped or inaccessible places, such as mountainous or swampy areas.
Although
humans are able to walk without infrastructure, the transport can be enhanced
through the use of roads, especially when using human power with vehicles, such
as bicycles and carts.
Advantages of human
transport
1. Availability: It is a means of transport that is readily available all the
time. It may also be the only means available where other forms of transport
cannot be used.
2. Cheap: Human
transport is cheap and affordable than any other form of transport. It can be
used anywhere and by everybody. Where the owner transports his/her own goods,
no costs are incurred.
3. Safety: It is safer than road, air or water transport because few
accidents occur during transportation.
4. Flexibility: Human transport can be used to transport different types of
goods to various places in urban and rural areas. It is convenient as it is not
affected by congestion.
5. It
complements other forms of transport like road and railway transports. When
goods arrive at destination, it has to be carried to places where it can be
transported by other means of transport. This includes moving goods to
warehouses, stores, onshore, or across areas inaccessible by vehicles.
6. Human
transport does not pollute the environment as it does not involve the release
of gases as compared to other forms of transport. It causes little or no noise,
emits no smoke and spills no oil.
Disadvantages of human
transport
1. It is
extremely slow and laborious.
2. It
depends on the physical fitness of the person. When sick or injured, transport
cannot be undertaken. Thus, it is severely curtailed by sickness or injuries.
3. It is
not suitable for carrying heavy and bulky goods. It is not also convenient for
carrying goods over long distances. This transport is only suitable for
carrying light goods over short distances.
Animal transport
This is
the use of animals for movement of people and goods. Animals have been used as
means of transport since ancient times. This kind of transport was used to back
up (support) human transport, especially when the goods and people were to be
moved over long distances.
This
form of transport is commonly used in areas where other means of transport are
hard or difficult to use. The animals commonly used include donkeys, mules,
horses, camels, oxen, elephants, water buffaloes, lamas and dogs.
Animals that carry goods on their backs are referred to as pack animals whereas
those that transport goods by pulling are referred to as draught animals, draft animals or beasts of burden.Humans
may ride some of the animals directly, use them as pack animal for carrying
goods, or harness them, alone or in teams, to pull wheeled vehicles.
Animal transport
Animal transport has the same advantages and disadvantages as
human transport. However, its advantages over human transport include the following:
1. It is
faster than human transport.
2. It can
be used to carry heavier and larger loads over long distances.
3. It can
be used in places with adverse (harsh or hostile) conditions which humans
cannot withstand e.g. in deserts and water-logged places.
Road transport
A road
is an identifiable route, way or path between two or more places. Roads are
typically smoothed, paved or otherwise prepared to allow easy travel.
Road
transport is most common on land and reaches even the most remote areas. It
involved the use of various vehicles such as motor cars, buses, trucks,
motorcycles, bicycles, carts etc. It is one of the most important means of
transport and is crucial to the development of commerce and industry. All the
movement of goods begins and ultimately ends by making use of roads. Roads act
as an important feeder to the other modes of transport such as railway, water
and air transports.
Roads
are constructed and owned by the local or central government. They play a big
role in the economic development of many countries. This can be proved by the
fact that the highly developed nations in the world have the best road
networks. This is because roads facilitate the movement goods and people, thus
boosting trade and commerce.
Though
road transport has some limitations, it is necessary in the development of
commerce and industry. It plays a very significant role in the economic
development of a country.
Advantages of road
transport
There are numerous advantages of road transport in comparison to
other modes of transport. Advantages of
road transport include the following:
1. Road
transport requires much less capital investment as compared to other modes of
transport such as railways and air transport. The cost of constructing,
operating and maintaining roads is cheaper than that of the railways. Roads are
generally constructed by the government and local authorities and only small
revenue is charged for the use of roads.
2. It
involves different types of vehicles and hence gives the person a wide freedom
to choose the kind of transport to use. One can use a bus, lorry, truck, etc,
depending on the weight and bulkiness of goods to be transported.
3. Road
transport is most suited for carrying goods and people to and from rural areas
which are not served by rail, water or air transport. Exchange of goods between
large towns and small villages is made possible only through road transport.
4. Road
transport has a great advantage over other modes of transport for its flexible
service. Its routes and timings can be adjusted and changed to individual
requirements without much inconvenience. One of the outstanding advantages of
road transport is that it provides door to door or warehouse to warehouse
service. This reduces cartage, loading and unloading expenses.
5. It is
more economic and quicker for carrying goods and people over short distances.
Delays in transit of goods on account of intermediate loading and handling are
avoided. Goods can be loaded direct into a road vehicle and transported
straight to their place of destination.
6. As the
intermediate loading and handling is avoided, there is lesser risk of damage,
breakage etc. of the goods in transit. Thus, road transport is most suited for
transporting delicate goods like chinaware and glassware, which are likely to
be damaged in the process of loading and unloading.
7. As
compared to other modes of transport, the process of packing in motor transport
is less complicated. Goods transported by motor transport require less packing
or no packing in several cases.
8. If the
goods are to be sent immediately or quickly, motor transport is more suited
than the railways or water transport. Water transport is very slow. Also much
time is wasted in booking the goods and taking delivery of the goods in case of
railway and water transport.
9. Road
transport not only requires less initial capital investment, but also the cost
of operation and maintenance is comparatively less. Even if the rate charged by
motor transport is a little higher than that by the railways, the actual
effective cost of transporting goods by motor transport is less. The actual
cost is less because motor transport saves in packing costs and the expenses of
intermediate loading, unloading and handling.
10. Road
transport is a feeder to other modes of transport. The movement of goods begins and ultimately ends by making use
of roads. Road and motor transport act as feeders to the other modes of
transport such as railways, ships and airways. Goods are normally transported
to and from airports, ports, or railway stations by road.
11. Roads
can be constructed, developed or maintained while they continue to be used.
This is unlike railways, airports or sea ports which have to await full
construction before they can be used.
Disadvantages of road
transport
In spite of various merits, road transport has some serious
limitations. The following are some of these limitations:
1. Motor
transport is not as reliable as railway transport. During rainy season, earthy
roads become unfit and unsafe for use. Heavy rains may also cause flooding and
cut off some sections of the road making it impassable.
2. There
are more chances of accidents and breakdowns in case of motor transport. Thus,
motor transport is not as safe as rail, air or water transport. This is
especially because of reckless driving, defective vehicles, overspeeding,
overloading and poor states of some roads, among other reasons. The accidents
cause loss of life and damage to goods.
3. This
mode of transport is unsuitable and costly for transporting heavy and bulky
goods over long distances. Vehicles can only carry a limited number of people
and amounts of goods compared to ships or trains which carry heavy loads. Where
transport involves carrying bulky and heavy goods, then water or railway
transport would be a better option.
4. The
speed of motor transport is comparatively slow and limited compared to air
transport.
5. Goods
transported by road face the risk of being stolen by robbers while on transit.
Most of such incidences occur in remote and bushy areas.
6. Motor
vehicles emit gases which contribute to air pollution. Also some vehicles
produce too much noise which pollutes the air.
7. Road
transport face the problem of congestion (traffic jam), especially during peak
hours. People traveling by road may waste much time and fuel in jams as the
vehicles take long time to reach desired destinations.
8. The
road transport is comparatively less organized. More often, it is irregular and
unreliable. The rates charged for transportation are also variable and unequal.
Railway transport
This is
a means of transport that involves the movement of people, goods or services
from one place to another via rails and trains. Railway transport is capable of
carrying many passengers and cargo per single trip as compared to road or air
transport.
Railways
in East Africa were constructed by the colonialists mainly for carrying raw
materials from the mainland to the coast for shipping overseas. Most railway
lines run from the interior to sea ports in the coasts. These lines have
remained intact hitherto, only that most of them have been renovated and
maintained to meet and suit the current transportation needs.
The
central line, formerly known as Tanganyika Railway, is the most important
railway line in Tanzania. It runs west from Dar es Salaam to Kigoma on Lake
Tanganyika via Dodoma. A branch leads to Mwanza on Lake Victoria.
The TAZARA Railway, also known as the Uhuru Railway or Tanzam
Railway, links the port of Dar es Salaam in Tanzania with the town of Kapiri
Mposhi in Zambia’s Central Province. The single-track railway is 1860 km long
and was built from 1970 to 1975 as a turnkey project financed by China.
Tanzania’s railway network
Railway transport
Advantages of railway
transport
1. The
greatest advantage of the railway transport is that it is the most dependable
mode of transport as it is least affected by weather conditions such as rain,
fog, etc. compared to other modes of transport.
2. The
railway transport is better organised than any other form of transport. It has
fixed routes and schedules. Its service is more certain, uniform and regular as
compared to other modes of transport.
3. Its
speed over long distances is more than any other mode of transport, except
airways. Thus, it is the best choice for long distance traffic.
4. Railway
transport is economical, quicker and best suited for carrying heavy and bulky
goods over long distances.
5. It is a
cheaper mode of transport as compared to other modes of transport. More loads
and a great number of people can be transported in a single trip over long
distances at relatively low costs.
6. Railway
is the safest form of transport. The chances of accidents and breakdowns of
railways are small as compared to other modes of transport. Fewer accidents are
reported in railway transport.
7. The
carrying capacity of the railways is extremely large. Moreover, its capacity is
flexible which can easily be increased by adding more wagons.
8. It is
not affected by the problem of congestion as is the case with road transport.
9. Trains
have such facilities as cafes, bathrooms and sleeping space, making long
distance travel quite comfortable.
10. There
are good cargo handling facilities such as cranes and fork lifts used at cargo
handling stations. These save on time as well as cost.
11. Modern
passenger trains called bullet trains are very fast and efficient. Travelling
over 200 km/h, they cover long distances in a very short time. Such trains are
common in Japan and China.
Disadvantages of railway
transport
Although railway transport has many advantages, it has certain
serious limitations. The following are some of the disadvantages of railway
transport:
1. The
railway requires a large investment of capital and it takes a long time to
construct. The cost of construction, maintenance and overhead expenses are very
high as compared to other modes of transport. A lot of money is required to lay
down the rail and all other facilities like warehouses, stations, safety, etc.
2. Another
disadvantage of railway transport is its inflexibility. Its routes and timings
cannot be adjusted to individual requirements. People travelling or
transporting goods by railway have to adhere to time and schedule. Also railway
transport cannot provide door to door service as it is tied to a particular
track.
3. It
involves much time and labour in booking and delivery of goods through railways
as compared to road transport.
4. Railway
transport (except in the case of bullet trains) is normally slow. So it is not
suitable for transportation of perishable goods like milk, vegetables and meat
as they can easily go bad while on transit. It is also not reliable for
transportation of goods which are urgently needed like newspapers, medicines,
etc.
5. Railway
transport is not economical for transporting people or few light goods over
short distances.
6. Railway
tracks come in different gauges. Some are narrow while others are wide. If two
counties use different railway gauges, then railway networks between the two
countries cannot be connected.
7. Railway
transport can not benefit the rural people as there are very few or no railway
stations to serve these areas.
Pipeline transport
Pipeline
transport is the transportation of goods through a pipe. Liquid and gases are
transported in pipelines, but pneumatic tubes can also transport solid capsules
using compressed air. For liquids and gases, any chemically stable liquid or
gas can be sent through a pipeline. Short-distance systems exist for sewage,
slurry, water, milk and beer, while long-distance networks are used for
petroleum and natural gas.
Pipelines
are most convenient, efficient and economical mode of transporting liquids like
petroleum, petroleum products, natural gas, water, milk, etc. Even solids can
also be transported through pipelines after converting them into slurry.
The
pipes used to build pipelines usually range between 10 cm and 120 cm in
diameter. The pipelines are made of steel or plastic tubes. They are built
either above or under the ground, though those built underground are difficult
to detect and repair in case a leakage occurs. The oil or gas is moved through
the pipelines by pump stations along the pipeline.
The
Tanzania Zambia Mafuta (TAZAMA) pipeline which runs from the port of Dar es
Salaam in Tanzania to Ndola in Zambia, covering 1710 km, and the local Songogas
pipeline from Songosongo to Dar es Salaam are examples of pipelines.
In
Kenya, a pipeline managed by the Kenya Pipeline Company extends from Mombasa to
Nairobi, covering a distance of 450 km. The pipeline transports refined
petroleum products from Mombasa to Nairobi.
Advantages of pipeline
transport
1. Pipeline
transport is not associated with environmental pollution. This can only occur
if there is a leakage that is not detected and repaired in time.
2. Pipelines
can be laid through difficult terrains as well as under water, making pipeline
transport flexible.
3. This
kind of transport is not affected by congestion as is the case with road
transport. So it is the safest and fastest means of transporting fluids.
4. It
needs very little maintenance. Although initial investment on pipeline
construction is higher, the operation and maintenance costs are low.
5. This
type of transport is not affected by adverse weather events such as floods,
heavy rains, fog, etc.
6. It
complements other forms of transport. For example, oil is alternatively
transported in tankers via roads or water.
7. Accidents
and theft are greatly reduced compared to other modes of transport, such as
roads.
Disadvantages of
pipelines transport
1. It is
not flexible when it comes to delivering the products such as natural gas and
oil to ultimate consumers. The product has to be delivered through other means
such as roads.
2. It is only
economically viable if there is constant supply of the fluids. It is not suited
for rare or occasional uses.
3. If the
pipeline is not well maintained and repaired timely, leakages can occur and
pollute the environment. This may lead to loss of biodiversity.
4. Pipelines
are mainly convenient for transporting fluids. They are not suitable for
transporting other goods, though in some cases other solids can be transported
under pressure.
5. Underground
pipelines cannot be easily repaired and detection of leakage is also difficult.
6. Pipelines
are expensive and they take a long time and intensive labour to build. In poor,
developing countries like Tanzania, the funds for construction of the pipeline
may not be available, hence leading to dependence on loans and grants from
donors.
7. They
have fixed carrying capacities which cannot be exceeded. Pipelines have
specific diameters and hence carry fixed amounts of the fluid.
8. Pipelines
conveying flammable or explosive material, such as natural gas or oil, pose
special safety concerns and there have been various accidents. Pipelines can be
the target of vandalism, sabotage, or even terrorist attacks. In war, pipelines
are often the target of military attacks.
Air Transport
This is
the movement of people, goods or services from one place to another through the
air. It is the fastest mode of transport and involves the use of aircraft such
as aeroplanes, helicopters and hot air balloons. Aviation is able to quickly
transport people and limited amounts of cargo over longer distances, but incur
high costs and energy use. For short distances or in inaccessible places,
helicopters can be used.
There
are two broad categories of air transport, namely, domestic and international.
Domestic air transport involves movement of people and goods within the country
while international transport involves movement of people and goods from one
country to another.
Air
transport is not well developed in most developing countries because of the
high costs involved to set up, operate maintain the industry.
Though
air transport is fast, the cost of its operation is very high and thus it is
suitable for only rich passengers, mails and light and costly cargo. However,
in advanced countries like U.S.A., Germany, etc. it offers a tough competition
to the railways.
Advantages of air
transport
1. The
supreme advantage of air transport is its high speed. It is the fastest mode of
transport and most suitable mean where time is an important factor. It is thus suitable
for carrying goods of perishable nature, which require quick delivery, and
light goods of high value such as diamonds, gold, etc. over long distances.
2. It
provides a regular, comfortable, efficient and quick service. Travelling by air
is comfortable especially over long distances.
3. Air
transport is not affected by physical barriers such as mountains, forests,
lakes, rivers, etc. It follows the shortest and direct routes as these barriers
do not interfere with aircraft movement.
4. It is
flexible since the routes and planes can be swapped when need arises.
5. The
transport is scheduled, so there is no time wasting. This enables travelers to
plan their journey in advance, a fact which makes this mode of transport
reliable.
6. It does
not require huge capital investment in the construction and maintenance of
surface track.
7. Air
transport can be used to carry goods and people to the areas which are not
accessible by other means of transport. It can operate even where all other
means of transport cannot take place due to the floods or other natural
calamities. Thus, at that time, it is the only mode of transport which can be
relied upon to do the relief work and provide the essential commodities of
life.
8. Air
transport plays a very important role in the defence of a country. Modern wars
have been fought mainly by aeroplanes. It has upper hand in destroying the
enemy in a very short period of time.
Disadvantages of air
transport
1. It is
the costliest means of transport. The fares of air transport are so high that
they cannot be afforded by the common people.
2. Air
transport is controlled to a great extent by weather conditions. When storms,
fog, mist, snow, heavy rain or any signs of unfavourable weather conditions are
detected, take off of planes is delayed, routes changed or flights cancelled.
3. In case
of accidents there is very little chance of survival. Therefore it has
contributed to loss of life of many people in the world.
4. Air
transport is unsuitable for carrying cheap, bulky and heavy goods because of
its limited carrying capacity and high transport costs.
5. It
requires a large amount of capital investment in the construction and
maintenance of aeroplanes.
6. Air
transport requires specialized skills and high degree of training for its
operation. Training of the personnel in the aviation sector is a very expensive
venture. This is a problem for poor countries which are not able to train a
sufficient number of personnel to keep up with the demand since training is
very expensive.
7. It is
relatively inflexible as it only serves places that have airports and
airstrips. An exception is the use of a helicopter which can land in various
areas.
8. Insecurity
problems are also experienced in air transport. There are cases of hijacking
and terrorist attacks.
Water transport
Water
transport is the movement of goods and people by means of a watercraft, such as
a barge, boat, ship or sailboat, over a body of water, such as a sea, ocean,
lake, canal or river. The need for buoyancy is common to watercraft, making the
hull a dominant aspect of its construction, maintenance and appearance.
Water
transport is the cheapest and the oldest mode of transport. It operates on a
natural track and hence does not require huge capital investment in the
construction and maintenance of its track except in case of canals. The cost of
operation of water transport is also very less. It has the largest carrying
capacity and is most suitable for carrying bulky goods over long distances. It
has played a very significant role in bringing different parts of the world closer
and is essential to foreign trade.
Water transport consists of:
1. Inland
water transport
2. Ocean
and sea transport
Inland
water transport involves the transport of people and goods by rivers, canals
and lakes.Ocean/sea transport involves the transport of people and goods by the
oceans and seas
Inland water transport
Most
inland water transport takes place in lakes, navigable rivers and canals. Lakes
that are major waterways in East Africa include Lake Victoria, Lake Tanganyika
and Lake Albert. Navigable rivers are those that are deep, wide and slow enough
for water vessels like ships and boats to sail on. There are very few navigable
rivers in East Africa and Africa as a whole. Most of the rivers are not
navigable throughout the year and only a small portion of their courses are
suitable for navigation. Examples of navigable rivers in Africa include Rivers
Nile, Zambezi, Congo, Niger, and Ogooue in Gabon. Other navigable rivers in the
world include River Rhine in Europe, Rivers Indus and Ganges in Asia, and Rivers
Yukon, Albany and Mississippi in North America.
Canals are channels that are made through land to allow water
vessels like ships or boats to travel along. Examples of canals include the
Suez Canal which connects the Mediterranean Sea with the Red Sea and the Panama
Canal which connects the Caribbean Sea with the Pacific Sea. Canals in Europe
include Ludwig Canal which joins River Danube to River Main, and the
Dortmund-Ems Canal which joins River Rhine to the North Sea. Canals in North
America have been built along the Great Lakes and include Welland Canal which
connects Lake Erie to Lake Ontario.
Suez Canal
Sea and ocean transport
Sea
transport enables countries and continents to connect with sea ports in all
parts of the world. Passenger and cargo liners are used in ocean or sea
transport. The use of passenger liners is diminishing because of the impact of
air transport. However, sea transport has been improved by refrigeration and
containerization. Refrigeration enables transportation of perishable goods
whereas containerization ensures there is safety and security, ease of handling
and economic use of space in the transportation of goods.
Ocean
transport is crucial for foreign trade. It has brought the different parts of
the world closer and has knitted together all the nations of the world into one
big world market. It is, obviously, the cheapest mode of transport.
Ocean transport includes:
1. Coastal
shipping
2. Overseas
shipping
Coastal shipping
This is
one of the most important means of transport for carrying goods from one part
to another in a country. It is a cheaper and quicker mode of transport and is
most suitable for carrying heavy, bulky and cheap cargo like coal, iron ore,
etc. to distant places. However, it can serve only limited areas.
Overseas shipping
This involves movement of goods and people from one country or
continent to another country or continent. There are three types of vessels
employed in the overseas shipping:
1. Liners:Liners are the ships which have regular fixed
routes, time and charges. They are, usually, a collection of vessels owned by
one person or company, i.e., a fleet. They provide a uniform and regular
service. Liners sail on scheduled dates and time, whether full of cargo or not.
An example of liners in Tanzania is Azam Marine Transport, which is a
collection of water vessels owned by one person and operating between Dar es
Salaam, Zanzibar and Tanga.
2. Tramps:Tramps are ships which have no fixed routes.
They have no set rules, charge rates or schedule. Usually, they do not sail
till they have full cargo. They can be chartered by exporters and are ready to
sail anywhere and at any time. They are not as fast in speed as liners. Tramps
are more suitable for carrying seasonal and bulky goods.
3. Tankers:Tankers are the vessels which are specially
designed to carry oil, petrol and such other liquids. They have a large
capacity ranging from 200,000 to 300,000 tonnes of oil, and very rarely, we may
have super tankers with a capacity of about 1,000,000 tonnes of oil.
Advantages of water
transport
1. Water
is a natural route which does not require any cost of construction and
maintenance. Even the cost of construction and maintenance of canals is much
less. Moreover, the cost of operation of the inland water transport is very
low. Thus, it is the cheapest mode of transport for carrying goods from one
place to another.
2. It is
the most suitable means of transporting larger quantities of heavy and bulky
goods such as coal, machinery, hardware and timber over long distances.
3. There
is minimal congestion in water transport compared to road transport. Congestion
can only occur at ports during loading and unloading of cargo.
4. The
risks of accidents and breakdowns, in this form of transport, are very minimal
as compared to any other form of transport.
5. Some
cargo ships are specialized for transportation of the same type of cargo, e.g.
petroleum, chemicals, foodstuffs, or animals. So the safety of cargo is
ensured.
6. Water
navigation facilities such as ports, tugs and lighthouses do not need frequent
repairs and maintenance as compared to transportation infrastructures of other
modes of transport.
7. It is
suitable for transportation of fragile or breakable goods, such as glass, since
there is very limited shaking and jolting on the waterways.
Disadvantages of water
transport
1. Water
transport is very slow and therefore this mode of transport is unsuitable where
time is an important factor since it takes a long time to travel or move goods
from one place to another.
2. Rivers
and canals cannot be operated for transportation throughout the year as water
may freeze during winter or water level may be reduced greatly during dry
season. Also during heavy rains, the rivers may flood or flow too fast, making
them unsuitable for navigation.
3. Modern
shipping vessels are very expensive. Port construction, as well as purchase of
loading and unloading machinery is also expensive. As such, a lot of capital is
required to effectively operate water transport systems.
4. Water
transport system cannot be constructed anywhere. It can only be done in a
limited area which is served by water bodies.
5. The
inland water transport by rivers is unreliable and sometimes the river changes
its course which causes diversion in the normal route of the river.
6. There
is sometimes a problem of strong winds and storms, which greatly interfere with
the shipping schedule.
7. Some
water bodies are infested with dangerous animals such as crocodiles,
hippopotamuses and snakes, which can endanger the lives of people sailing
through water.
Importance of
Transport
The Importance of Transport in Tanzania and East Africa
Explain
the importance of transport in Tanzania and East Africa
The following is an outline of the importance of the transport
industry in East Africa:
1. Source of employment:The transport employs
many people in different fields. People are employed in the construction of
infrastructures such as roads, railways, airports, ports, railway stations, and
many other transport facilities. Yet a good number of East Africans are employed
directly as drivers, conductors, pilots, cabin crew, captains of ships,
mechanics, traffic controllers etc. These people are directly engaged in the
transportation business.By supporting other sectors, such as trade and
commerce, it also offers employment to many other people. These people include
those working in automobile manufacturing industries, petroleum production and
sale, and manufacture of various products used in the transport sector.
2. Promotes trade and commerce:The
transport sector aids the movement of goods and services. As such it promotes
trade and commerce by facilitating the movement of these tools of trade from
production areas to consumers.
3. Promotes unity and understanding:Transport
enables people from different places or country to travel and interact. This
improves understanding and unity between people of different ethnic groups
within the country or people of different races and cultures from different
countries. This helps to create a better understanding and it eliminates any
enmity between or among different people. This has led to good relationship
between and among different countries in the world.
4. Facilitates exploitation of natural resources:A sound
transport network linking areas with natural resources such as minerals,
forests and water facilitates exploitation of these resources because they can
be easily transported from their deposits or sources to consumers or to
industries for processing.
5. Encourages the development of industries:Transportation
encourages the development of other industries. For example, enhanced transport
of agricultural produce from rural areas leads to growth of the primary
industries such as food processing and lumbering industries. Similarly, access
to mineral deposits by roads, railways etc encourages the development of
mineral processing industries as these industries are assured of the
availability of raw materials because of a well developed transport system
linking the deposits with industries. Also transport industry encourages the
development of petroleum production and refinery so as to produce enough oil
required for running vehicles, road construction machinery, and other machines.
6. Encourages development of settlements:Normally,
people like to set up settlements in places which are accessed by various means
of transport. Good transport system enables people to move from one place to
another or transport their goods with ease. Therefore, availability of
transport services encourages people to settle in certain areas.
7. Source of government revenue:The
government collects revenue from motor vehicle insurances, taxes on imported
automobiles and fuels, driving licences, parking fees, and tax on use and
access of some transportation infrastructures such car packing fees, etc.
Problems Facing
Transport Industry
Problems Facing Transportation in East Africa
Identify
problems facing transportation in East Africa
Most
transport infrastructures in East Africa are very poor. The countries in the
region are very poor economically. So they allocate just a small proportion of
their fiscal budgets for infrastructure development, renovation and
maintenance. These countries mainly depend on donors to finance their projects.
As a result many projects they plan are not implemented.
The following are some of the problems facing the transport
industry in East Africa:
1. Lack of capital:The development of the
regional transport network has mainly been hampered by insufficient financial
resources. A great deal of capital is required to lay down good transportation
infrastructures. Likewise, vehicles are very expensive to purchase and
operate.Because East African countries are among the poorest countries in the
world, they cannot afford to construct good infrastructures to improve the
transport sector.
2. Lack of skilled labour:The countries have not
invested adequately in development of skills among labour. There is a lack of
skilled labour to engage in the transport sector which includes construction of
infrastructures, repair and operation of machinery etc. The training of labour
in the industry, especially in air, railway and water transport is very
expensive.
3. High fuel costs:The price of oil in the
world market is persistently escalating. This makes operation of the transport
sector even more costly. Increase in the price of fuel leads to rise in costs
of transport and it also affects other sectors of the economy. This makes
transport and other sectors expensive and thus unaffordable to most East
Africans.
4. Political problems:Political instability
affects the transport industry severely. During chaos most of the economic
activities cannot be carried out and the transport infrastructures and other
public goods may be destroyed by enemies. There has been political instability
in countries like Burundi, Rwanda and Somalia. This has not affected transport
in the respective countries alone, but also the rest of the countries in the
region. Uganda and, to some extent, Kenya have also been in political turmoil
in the past. During war, the countries cannot invest adequately in transport
sector as much capital is spent on the purchase of weapons and other security
gears.
5. Landlockedness:Many countries in the
region are landlocked, so they use other countries’ sea ports to export and
import goods and services. In case of any misunderstanding between these
countries, transport is curtailed severely. Uganda, Rwanda and Burundi are
landlocked countries. They rely on ports of other countries such as Mombasa and
Dar es Salaam to export and import their goods to and from overseas.
6. Impassable waterways:Very few lakes and rivers
in East Africa are navigable. Most rivers are interrupted by cataracts,
waterfalls and rough beds, so they are not ideal for navigation. Only small
sections of rivers are navigable all the year round.Some waterways contain
floating vegetating such as water hyacinths which clogs the water ways making
them impassable.
7. Thick vegetation:A large part of East
Africa is covered with dense vegetation. This hinders transport in two
ways:-First, construction of roads, railways and airports in such places is
very expensive. This is due to extra costs incurred in clearing the vegetation.
Also areas covered with forests are associated with heavy rainfall, making them
unsuitable for infrastructure construction.Secondly, the thugs and robbers
prefer to hide in thick forests in order to waylay, attack and rob passengers
of money and other properties. Travel through places like that may be so
dangerous and is often avoided especially during the night.
8. Rough terrain:Mountainous and rugged
terrain of East Africa makes construction of roads, railways, airports and
pipelines very difficult and expensive.
9. Differences in railway gauges:The
railway lines in East African countries are of different gauges. Also the width
of the tracks differs. This makes it impossible for countries to be connected
with railway transport.
10. Corruption and embezzlement:Due to
notorious bribery and other forms of corruption in East African countries, the
transport infrastructures are often constructed below standard such that they
wear out quickly within few years of operation. This is because the little
funds set aside for construction of various infrastructures are very often
embezzled by greedy government officials for their own benefits. Tanzania is
the best example where many corruption scandals are reported each year.
The Measures to Address Transportation Problems in Tanzani
Explain
the measures to address transportation problems in Tanzania
Measures taken to address
the problems of transport industry in Tanzania include the following:
1. Government
officials involved in corruption scandals pertaining to embezzlement of funds allocated
for construction of transport infrastructures should be heavily punished. They
should be jailed and their properties confiscated by the government for the
public interest.
2. The
country should put more efforts to collect revenue and seek assistance from
donors to assist in infrastructure construction. Also the revenue collected
must be spent wisely.
3. Training
of manpower in various fields of transportation sector like pilots, cabin crew,
mechanics, civil engineers etc will help to produce skilled labour needed in
the transport industry. This can be achieved by introducing transport-related
courses in schools, colleges and universities.
4. Formulation
of policies and laws that promote the development of the transport industry.
This will attract both local and foreign investors to invest in the transport
industry.
5. Fluctuation
in oil prices affects the transport industry significantly. When the oil prices
go up the transport costs also rises. This problem can be solved by keeping
sufficient oil reserves so that when the prices shoot up the industry is not
affected.
6. The
transport industry should keep pace with advancements in technology of the
transport sector in order to increase efficiency and reduce accidents. The
government should formulate policies that ensure maintenance of the
level-playing field for all investors. It may also consider tax relaxation for
local investors.
7. The
East African countries should build railway lines with the same gauges and
trucks so as to ensure connectivity with all countries in the region.