关键词: 岩溶, 示踪试验, 天坑, 塞海湖水库, 湖南省

Abstract:

When reservoir is constructed in complex karst area, the key point in preliminary investigation is to analyze seepage problems and often a variety of methods are required for comprehensive analysis and research. We took several methods including karst spring and well survey, tracer test of groundwater, flow observation of river and karst springs, geological drilling，geophysical prospecting and so on to demonstrate seepage conditions of the proposed Saihaihu Reservoir, a barrier lake in strong karst area, and finally made the karst hydrogeological conditions clear and found out the main karst seepage passage of Saihaihu Reservoir head. The result shows that it is not suitable to construct reservoir at Saihaihu at this stage.

Key words: karst seepage, tracer test, sinkhole；Saihaihu Reservoir, Hunan Province