A preliminary appraisal of the impact of agriculture on ground-water availability and quality in Southwest Georgia
|Authors:||Pollard, L. D.; Grantham, R. G.; Blanchard, H. E., Jr.|
|Source:||Reston, VA [Water-Resources Investigations - U. S. Geological Survey, No.WRI 79-7. Publisher: U. S. Geological Survey,], United States. ISSN: 0092-332X|
|Summary:||Irrigated acreage in the 20-county study area in southwest Georgia increased from 130,000 acres in 1976 to 261,000 in 1977. Acreage irrigated entirely by ground water increased 85 percent for the same period. The largest quantity of ground water used for irrigation was in the Dougherty Plain district, where 92 percent of supplemental irrigation water comes from wells. The total amount of water pumped for irrigation in the Dougherty Plain in 1977 was more than 42 billion gallons, 30 billion gallons more than in 1976. There were no detectable concentrations of selected organic compounds and trace metals used in agricultural chemicals above the recommended limits for public consumption in 19 wells sampled for chemical analyses. Although nitrate concentrations were not above the recommended limits for drinking water, the presence of nitrate in amounts ranging from 0.3 to 7.8 milligrams per liter in wells in the Dougherty Plain possibly indicate the downward movement of soluble nitrate, a byproduct of fertilizer, into the ground-water reservoir. (Woodard-USGS)|
|Subjects:||Agriculture; Environmental geology; Ground water; Hydrogeology; Land use; Surveys; USGS; Water quality; Water supply; Georgia; United States|
|Coordinates:||N304500 N323000 W0833000 W0850000|
|Copyright Information:||GeoRef, Copyright 2018 American Geosciences Institute. Reference includes data from USGS product, Selected Water Resources Abstracts, Reston, VA, United States|
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