Research on water finding methods for fault water-impounding structure in bedrock mountainous areas
Fault water-impounding structures are the most common type of well formed water-impounding structures in water scarce mountainous areas of Henan Province,and searching for fault water-impounding structures is the main direction for finding water.Based on the analysis of the classification and water storage characteristics of fault water-impounding structure,this study proposed a compre-hensive well finding method that follows the principle of closely combining hydrogeological work with comprehensive geophysical explo-ration technology.Based on the selection of target areas in hydrogeological work,a comprehensive geophysical exploration technology that effectively combined the magnetotelluric sounding method(EH4)and induced polarization sounding method used for comprehensive a-nalysis and well location.The fault zone of Tangchigou Village,Fanpo Town,Song County,Henan Province was selected as the water ex-ploration practice area for verification.The practice showed that the depth of the hole was 162 m,and the unit water inflow reached 2.13 m3/(h·m).Following the principle of closely combining hydrogeological work with comprehensive geophysical exploration technol-ogy,comprehensive well location is an effective method for water exploration of fault water-impounding structures in bedrock mountain-ous areas.
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