12 Freshwater I 2 - enough food for one person for one day...

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Water Demand
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The three major factors causing increasing water demand over the past century population growth industrial development expansion of irrigated agriculture. Agriculture accounted for most freshwater withdrawal in developing economies in the past two decades
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Population expected to grow to 9.3 billion by 2050 2 billion people will be “water scarce” (UNFPA, 2002)
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Industry and Income High income 30% 59% Middle income 74% 13% Low income 87% 8% Country Agriculture Industry Industrial use in China is expected to increase 5-fold .
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Agricultural Production Irrigated land expected to expand by 23% in 25 years 70% of all water used Food production has grown with population 1% world energy
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Irrigation for crops uses 65- 70 percent of fresh supplies It takes over 528 gallons of water to produce
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Unformatted text preview: enough food for one person for one day Industry uses 20-25 percent of available freshwater steel, computers, and raw materials for industrial products annual industrial water use in China could grow from 52 billion tons to 269 billion tons (5X) within the next two decades Domestic use accounts for about ten percent of water use each person needs between 2 -3 gallons of water a day for drinking, food preparation, and cooking average consumption per person is five gallons a day (WHO, UNICEF) , but in the U.S., Canada, and Western Europe the total consumption rises dramatically (>50 gal/day) Over the past 30 years, the area of land under irrigation has increased by about 30%. Overall Consumption...
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This note was uploaded on 02/10/2011 for the course SWS 2007 taught by Professor bonczek during the Fall '09 term at University of Florida.

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12 Freshwater I 2 - enough food for one person for one day...

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