Karst Development Characteristics and Its Influence on the Leakage and Anti-seepage Design of Hekoucun Reservoir

Leakage problem is a hotspot and difficulty for hydraulic engineering in karst area.The hydrogeological condition of Hekoucun reservoir is complex,larger scale karst develops locally.Based on the analysis of the spatial distribution law of the karst development in this area,the influencing factors were studied.The karst distribution was closely related to the geological structure,distance to the river bank,movement of the surface water and groundwater,and the unloading and weathering of the rock.Thus the influence of the karst on the reservoir leakage was analyzed,which provided a reasonable basis for the leakage evaluation and anti-seepage design.