3.1.6

Increasing Water Supply

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How Can We Increase Water Supplies?

Increasing water supplies can be achieved by diverting water supplies, increasing water storage, using dams & reservoirs, using water transfers or building desalination plants.

Increasing water storage, dams, and reservoirs

Increasing water storage, dams, and reservoirs

  • The UK uses dams and reservoirs to transfer water.
  • Networks of dams, reservoirs, and aqueducts can transport water across the UK.
  • Manchester gets water from the Lake District, Birmingham gets water from Wales, London gets its water from the River Thames upstream of Teddington.
  • Water is trapped behind a dam. This builds a reservoir, full of water.
  • Reservoirs essentially build up a stockpile of water throughout the year, when it is most needed.
  • Inevitably, some land must be flooded to store water in a reservoir.
Water transfers and diverting water supplies

Water transfers and diverting water supplies

  • Water can be transferred from one area to another by diverting water supplies.
  • Water is usually moved from an area of surplus water to an area with a water deficit.
  • Building aqueducts and canals can help water flow to new places. However, gravity means that it has to be transferred from higher ground to lower ground.
Desalination

Desalination

  • Desalination plants take seawater, extract the salt and produce drinkable freshwater.
  • Desalination can happen by boiling seawater and separating the water & salt, or by filtering the seawater in a membrane.
  • Desalination is most common in areas with the largest water deficits (North Africa and the Middle East). These plants produce enough freshwater for 300 million people.
  • 97% of the Earth's water is salty seawater.
  • Saudi Arabia, Kuwait, the UAE, Bahrain and Qatar are 3 of the largest users of desalination to get water.
Jump to other topics
1

Physical Geography

1.1

River Environments

1.2

Coastal Environments

1.3

Hazardous Environments - Tropical Cyclones

1.4

Hazardous Environments - Earthquakes & Volcanoes

2

Human Geography

3

Global Issues

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