Dam_Notes - Dam Notes Dams Dams are built to impound water...

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Dam Notes
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Dams Dams are built to impound water which is released and channeled through turbines to generate electricity Hydroelectric power supplies about 10% of the U.S. electricity and 3% worldwide
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How it Works Water held in a reservoir enters the penstock through an intake The water turns a turbine which uses coiled wire and high power magnets to create electric current
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Pro’s Dams control flooding Low operating and maintenance costs No polluting waste products Long life spans Moderate to high net-useful energy Areas of water recreation
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Con’s Create large flooded areas behind the dam and people are displaced Water moves slow and can breed pathogens Destruction of wildlife habits and inhibit fish migration Sedimentation requires dredging Expensive to build Large-scale structures are subject to earthquakes
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Silting and Other Impacts Disease: slow waters in tropical areas breed mosquitoes, snails and flies – vectors of malaria, schistosomiasis, and
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Dam_Notes - Dam Notes Dams Dams are built to impound water...

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