Impact of Irrigation on Groundwater Quality in Humid Areas

by W. G. Knisel, USDA, Tifton, GA, USA,
R. A. Leonard, USDA, Tifton, GA, USA,

Document Type: Proceeding Paper

Part of: Water Forum '86: World Water Issues in Evolution

Abstract: The GLEAMS Model (Groundwater Loading Effects of Agricultural Management Systems) was applied to estimate the effects of soil, planting date, irrigation level, and pesticide characteristics on pesticide leaching below the rootzone of light-textured Coastal Plain soils. Climate/application/pesticide interactions significantly affect pesticide losses, whereas irrigation practice had little effect. Persistent (30-day half life) and mobile (low adsorptivity) compounds exhibited the highest losses.

Subject Headings: Hydrologic models | Irrigation | Groundwater management | Systems management | Pesticides | Water pollution | Water quality | Irrigation water

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