13 Florida Freshwater and Groundwater I

13 Florida - Homework II Due on Friday Posted on Website Water Use and Groundwater Supply is Dwindling Demand is increasing • population growth

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Unformatted text preview: Homework II Due on Friday Posted on Website Water Use and Groundwater Supply is Dwindling, Demand is increasing • population growth • industrial development • expansion of irrigated agriculture. Irrigation for crops uses 65- 70 percent of fresh supplies Industry uses 20-25 percent of available freshwater Domestic use accounts for about ten percent of water use 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 Turning to Groundwater Use Shallow sand, gravel, rock North China Plain Groundwater levels dropping in many developing countries Finite Resources Surface water 79% Groundwater 21% United States Abundant ground and surface water resources #1 use of groundwater is for irrigation #1 use of surface water is for power generation U.S. Thermoelectric power began dominating withdrawals in 1965 Overall withdrawals peaked in the 1980s #1 consumptive use is irrigation Aquifer levels declining Western population centers increasing Tripled in population over the last 40 years Tucson Florida 8 Bgal/d Water Withdrawn 1700 rivers and streams (Feet to miles wide) One of the most productive Aquifer systems in the world The Past The Past 8 million acres >100 miles ¼ mile per day Too much water The Everglades 35,000 people in 1830 "The first and most abiding impression is the utter worthlessness to civilized man, in its present condition, of the entire region." Buckingham Smith 1835 First Survey In 1850, the Swamplands Act Passed South Florida and the Everglades Transferred 20 million acres from federal to state control 11 miles (17.7 km) of canal south of Lake Okeechobee towards Miami. 1881 Hamilton Disston 50,000 acres drained By 1920 4 major canals constructed Historic Flow Current Flow The Present The Present 16 million people withdrawing 8 billion gallons/day Almost 30 M by 2030 #1 user Palm Beach Co. #1 groundwater use is Miami-Dade County A/C: 1950s first mosquito control district: 1922 DDT introduced: 1949 Bureau of entomology: 1953 Population doubled between 1950 and 1970 Changes 38% surface 62% ground 43% Public Supply 39% Agriculture 8.5% Industrial/Commercial 8....
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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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13 Florida - Homework II Due on Friday Posted on Website Water Use and Groundwater Supply is Dwindling Demand is increasing • population growth

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