Evaluation of Reservoir Seepage in Karst Topography

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by Ray E. Martin, Schnabel Engineering Associates, Richmond, VA, USA,
Brian Milner, Schnabel Engineering Associates, Richmond, VA, USA,

Document Type: Proceeding Paper

Part of: Geotechnical Aspects of Karst Terrains: Exploration, Foundation Design and Performance, and Remedial Measures

Abstract: Areas where seepage is likely to occur in the karst environment of the proposed West County Reservoir, Roanoke County, Virginia have been indentified. Solutioning exists in the form of sinkholes and caves and numerous springs occur in the reservoir valley. A hypothesis of inter-valley water flow based on identified bedding plane strike and fracture directions is presented. The hypothesis is tested by means of stream flow measurements, borings, groundwater tracing and electromagnetic surveys. A test grouting program has been recommended to allow proper design of production grouting for reducing seepage.

Subject Headings: Seepage | Reservoirs | Karst | Topography | Streamflow | Boring | Flow measurement | Soil tests | Groundwater flow | North America | Virginia | United States | Roanoke

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