Research on the Hydrology and Water Quality of Watersheds Subjected to Surface Mining. Phase 1: Premining Hydrologic and Water Quality Conditions.
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Five watersheds, ranging from 29 to 49 acres, were instrumented in east-central Ohio to investigate the hydrologic and water quality conditions occurring before, during, and after surface mining. Physical information was obtained for each watershed, and instrumentation was installed to obtain hydrologic and weather data and water quality samples. Premining ground water systems for each watershed had two major perched aquifers within the top 250 feet. Shallowest ground water is commonly of the calcium bicarbonate type; whereas, water in the deeper aquifers is of variable type. Although dissolved-solids concentration is generally 200 to 600 mg/l, brackish or salty water is present in several areas. A one- dimensional unsaturated flow model was developed to interface with a quasi-three-dimensional ground water model as part of a composite hydrologic model. The unsaturated flow model includes provisions for an evapotranspiration model.
CP; Final Contract Report;
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Ohio Agriculture R&d Center