Effect of Irrigated Agriculture on Ground-Water Quality in the Appalachian and Northeastern Statesby W. F. Ritter, Univ of Delaware, Newark, DE, USA,
F. J. Humenik, Univ of Delaware, Newark, DE, USA,
R. W. Skaggs, Univ of Delaware, Newark, DE, USA,
Abstract: Irrigation acreage has more than doubled in Virginia, North Carolina, Delaware and Maryland in the last 10 years. Ground-water studies have been conducted in Delaware, Maryland and New York in irrigated regions. Nitrate and aldicarb leaching has occurred on Long Island in New York where potatoes are grown. Poultry manure is the largest source of nitrate contamination of the water-table aquifer on the Delmarva Peninsula in Maryland. Both pesticide and nitrate leaching under irrigation has been studied in Delaware. A total water management system that can be used for both drainage and subsurface irrigation has been developed in North Carolina. The system will increase crop yields and has the potential for reducing nitrates by water table control.
Subject Headings: Irrigation | Groundwater quality | Agricultural wastes | Water quality | Irrigation water | Water pollution | Nitrates | Water table | Leaching | Drainage systems | North America | United States | Northeastern states | Maryland | Delaware | New York | North Carolina | Virginia
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