Methods of Water Supply
Water is a scarce and limited resource. Water scarcity is a growing problem in many places of the world and is likely to only get worse as a result of climate change. With growing population and growing wealth in countries like China and India increasing pressures are placed on water reserves. In developing countries population pressure, agriculture and the emerging tourism industry all combine to increase the stress on water supply.
The world's freshwater is limited in its supply. Of all water on the planet, 97 percent is saltwater and found in the ocean, 3 percent is freshwater, of which 77 percent is locked in glaciers and ice sheets and 22 percent is deep underground in aquifers. That leaves only 1 percent that is easily accessible in rivers, wetlands and lakes. (source)
The main reason for the growth in demand for water is because of population growth. Future growth to 2050 is only expected to come from developing countries. Unfortunately these regions are also the regions with greatest water shortage. The graph below which shows a slightly different projection for population growth shows how water demand grows at almost twice the rate of population growth.
Methods of water supply - Part 1 Groundwater
Watch the video above and complete the tasks on your worksheet.
The two videos below explain how we access water that is stored underground. Watch both videos and complete the note taking activity on your worksheet.
Watch the video above and complete the tasks on your worksheet.
The two videos below explain how we access water that is stored underground. Watch both videos and complete the note taking activity on your worksheet.
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The two videos below explain how we access water that is stored on the surface. Watch both videos and complete the note taking activity on your worksheet.
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How Water is Used
Task 3 - Study the image above (or download it by clicking on the grey tab above) and then complete the questions on the worksheet.
Water Shortage - (refer back to Sahel)
There is no new case study work to complete here. We have already covered this section in the Deserts work in the Natural Environments unit where we looked at water shortage (drought) in the Sahel region of Africa. Your revision for that will also come in handy for this unit of work too. Click on the image below to be taken back to the work on drought (you need to scroll down towards the bottom of the page).
Water Issues & Supply In Tanzania
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Objective: To find out what water issues arise in Tanzania and how improved water supply can impact on the health and well-being of the population.
To complete this task, please use the work booklet above.
Exam Corner - How does this look in the examination? (Paper 1).
Complete the exam question on the back page referring to the mark scheme for guidance.
Objective: To find out what water issues arise in Tanzania and how improved water supply can impact on the health and well-being of the population.
To complete this task, please use the work booklet above.
Exam Corner - How does this look in the examination? (Paper 1).
Complete the exam question on the back page referring to the mark scheme for guidance.
