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ES 2WW3_lecture5_ppt

ES 2WW3_lecture5_ppt - Earth Sc 2WW3 Lecture 5 Dams and...

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Unformatted text preview: Earth Sc 2WW3: Lecture 5 Dams and Interbasin Transfers Historical Perspectives on Water Use Why Dams and Transfers? Freshwater Stress Solution? Increasing water supplies Ways to increase supplies : • Withdraw groundwater • Desalinate salt water - make fresh water • Improve efficiency of water use Dams and Reservoirs • Reservoirs: essentially artificial lakes • Dams are built to impound water and to form a reservoir Purpose of Dams in the U.S. Principal Storage Zones in Reservoir Types of Dams Pros & Cons of Dams Decline in Dam building Watershed Transfers • Some watersheds have excess water, some have shortages • Solutions? • Problems? • Irrigation : increase crop yield; expand arable land • Industrial and municipal use • Hydroelectric power generation • Navigation : canals can be used to transfer water, but also to move between different centers • Financial gain Purposes of Transfers • Technical • Economic • Political : what is the agreement between donor...
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ES 2WW3_lecture5_ppt - Earth Sc 2WW3 Lecture 5 Dams and...

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