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70% of our planet's surface is covered in water.
Water Use and Shortages
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Whilst our planet is 70% water only 3% of that water is available as freshwater - and two thirds of that is locked up as ice! 1.1 billion people in the world don’t have access to safe drinking water and a further 2.7 billion find it difficult to get access to clean water for at least 1 month of the year. Lack of clean water creates several problems. The initial lack of clean water leads to water pollution which in turn leads to diseases being spread via the water supply.
1 .
What is an advantage of boreholes over hand dug wells?
They require a pump to bring up the water from the depths
Since they reach the water table, they are a more reliable and cleaner source of water
They need the area to be surveyed to find the correct location for the well to be sunk
They require equipment and skills that often have to be brought in
Boreholes are a more reliable source and will tap into underground reservoirs, leading to their use in many MEDCs - but they are a higher cost option then digging a simple well
2 .
The Pergau Dam project was one in which the British Government agreed to build a dam to provide electricity and clean water in Malaysia. However, there was a condition - Malaysia purchased arms from Britain in return for the aid. It was later shown that the electricity could have been produced in a more effective manner. What is this sort of aid deal, where conditions are attached that do not benefit the poorest sections of the population, referred to as?
Tied aid
Brokered aid
International aid
Trade agreements
Tied aid forces the country recieving the aid to spend the money, or an equal amount of money, in the country providing the aid. It may be that over half of all aid is tied
3 .
Which of the following is not a problem with water supplies in LEDCs?
Lack of available clean water
Diseases spread via the water supply
Water pollution
There is no water available
Often there is plenty of water available in LEDCs, with some suffering from flooding more than droughts. It's the lack of clean, safe water that is the real issue. Technologies that clean water are as important as ones supplying water
4 .
What is one of the main reasons domestic use of water is higher in MEDCs than in LEDCs?
People in MEDCs tend to drink more water
Labor saving devices, such as washing machines and dishwashers, are more popular in MEDCs
In MEDCs, people leave the taps running when not needed
Fishponds and swimming pools are much more common in MEDCs
Houses in MEDCs use far more water than in LEDCs. The use of rainwater harvesting and storage may in the future reduce the water usage by up to 50%
5 .
How does providing appropriately built and sited toilets increase the availability of fresh water in locations with no running water supplies?
Toilets can contaminate wells and other water sources with raw sewage if inappropriately built or sited
Placing toilets far from a settlement will mean less of its fresh water is used for waste disposal
Using waste water to flush toilets will save fresh water
Putting the toilets next to the well means that all the infrastructure is located together
Since wells and boreholes rely on water from the water table, contamination by raw sewage from toilets is a real problem. Correct siting and design mean that this risk is reduced
6 .
Charities often report that they are providing new spring fed systems in areas that already have a non-functioning one. Why might it be the case that the systems provided are falling into disrepair?
The local population lack the skills and tools to keep them repaired
The systems are designed so only the people that install them can maintain them
The local people would rather leave it for the charities to repair
The equipment is almost impossible to maintain without very expensive tools
Several charities now work not just to provide clean drinking water but also the skills, tools and parts to allow the local population to repair and maintain their own water systems
7 .
Why might wells be a suitable source of water?
The water will never become contaminated
They can be dug easily by hand
The water will never dry up if the water table lowers
Wells may collapse
Wells are normally dug by hand and so are relatively shallow. If sited correctly and dug to an appropriate level in the ideal geology, they can be a good source of water. But in general there are better sources of reliable water
8 .
Which of the following is not a way that providing clean water benefits local populations?
It reduces disease and illness from contaminated water
It increases the time available for work and education
It reduces the cost of drinking water
It allows local businesses to profit by selling clean water at high cost
When clean water is scarce it is often sold from tankers and other sources at a high cost. Providing clean, reliable and affordable sources of water allows the local economy to grow as people have more time for work and education and fewer days off due to illness
9 .
Which of the following is not a method of harvesting water?
Collecting rainwater off roofs
Damming areas to catch runoff during times of heavy rainfall
Borehole drilling to reach the water table
Storing water from rivers during seasonal high waters or flooding
Rainwater harvesting relies on the use of the water that falls as rain, rather than water from reservoirs underground. Building recommendations in the UK state that rainwater harvesting and storage should be incorporated into building designs where possible
10 .
Which of the following is one way that education can help safeguard water supplies in poorer areas of LEDCs?
Teaching farmers to use less water intensive crops
Stop all pollution entering rivers
Increase the amount of water entering the system
Reduce flood events by reducing the amount people discharge into rivers
Education can not only help reduce water usage, but also teach people to do more with what they have, and to safeguard the supplies by reducing the chances of contamination
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