factors that affect water supply and demand in USA

Question 1

Physical

Answer 1

• climate change is expected to reduce water supply through increased evaporation rates
• area recieves 25% of annual rainfall for USA
• forestry has reduced evapotranspiration

Question 2

Human

Answer 2

• 25% water lost in leakages
• rapid population growth e.g. Las Vegas and Sun city (Arizona)
• increased affluence for swimming pools and golf courses