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12 Freshwater I 3 - Supply and Demand Turning to...

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Supply and Demand Turning to Groundwater
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Turning to Groundwater Use 50% of the world’s drinking water 40% of industrial water 20% of agricultural water Local, On-demand Availability, Drought Resistance, Good Quality Heavy investment in groundwater exploration 1.2 billion urban citizens worldwide depend on groundwater
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India China Pakistan ½ the world’s total agricultural groundwater use In India, 80% of domestic supply and 70% of agricultural supply is from groundwater Fastest growing countries Groundwater Use
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Growing Pains
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Shallow sand, gravel, rock North China Plain This part of China is mostly flat and the soil, replenished by silt carried down by the Yellow River, is well-suited to agriculture
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½ China’s wheat, 1/3 corn Aquifer Levels dropping 3 ft/year Shift to Deep fossil aquifer (non-renewable) Agricultural well depths can exceed 1000 feet ($) Municipal well depths can exceed 3000 feet Shallow aquifer largely depleted (renewable) China’s grain production has fallen from its historical
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12 Freshwater I 3 - Supply and Demand Turning to...

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