1 chapter 18: water use and management water resources major water compartments water availability...
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Chapter 18: Water Use and Management
• Water Resources• Major Water Compartments• Water Availability and Use• Freshwater Shortages• Increasing Water Supplies• Water Management and Conservation
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Water Availability and Use• Worldwide: 69% agriculture, 25% industry, 6% domestic
Similar to Fig 17.12
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Notice huge difference between low and highIncome countries!!
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Freshwater Shortages
• 1 billion people without safe drinking water
• Groundwater sources being mined
–Rivers dry up
–Land subsides
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Increasing Water Supplies
• Storing and moving water (Dams, etc.) –
– Benefits• Power generation
• Flood control
– Drawbacks• Decreasing somewhere?
• Environmental costs
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Similar to Fig. 17.15
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Similar to Fig. 17.13
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Water Management and Conservation
• Conservation Equivalent to New Supply!!– Every gallon saved is equivalent to a new gallon
supplied– Example from movie?
• What is the best way to get people to conserve water?– Price at true value cost
• Cost of supply– Cost of US water should double to ensure supply for growing
population
• Scarcity value
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Movie: Cadillac Desert, Last Oasis (on reserve in library)
• America’s big dams – everybody wants them– INDIA Namadar River– CHINA Three Gorges Dam
• Freshwater sources for large populations in dry areas• Conservation?
– MEXICO Mexico City, class inequities– MIDDLE EAST– AMERICAN WEST
• Critical Thinking Question:– Is there a shift in a country’s approach to water resources that
accompanies the shift from developing to developed?
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Water flows across national borders!!
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Privatization of Water
• Water rights owned by private corporation instead of municipality– Promoted by World Bank– Isolated cases in USA
• Benefits? Drawbacks?– Read handout on privatizing water in
Cochabomba, Bolivia
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The End.
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