Western USA: Water supply

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  • Created by: EmilyN21
  • Created on: 17-06-15 19:10

4.3 What factors affect the supply and use of resources?

Background: Western USA covers 60% of the US, holding 40% of the population and recieving 25% of rainfall - Therefore demand exceeds the supply.

Factors affecting supply:

  • Low amounts of rainfall because of the Meditteranean climate.
  • Excessive pumping of aquifers.
  • Deforestation has reduced evapotranspiration.
  • High evaporation from…


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