Abstract:

Fengquan district in Xinxiang, Henan Province lacks of groundwater resources. To tackle this situation, by using the high-density resistivity method, the combination of highdensity resistivity method and induced polarization of symmetrical quadrupole, the authors prospected groundwater resources in complex hydrogeological condition of loose rock and bedrock regions, determined the well location based on hydrogeological data and well condition. The inferred results of high-density resistivity method and induced polarization of symmetrical quadrupole was verified by drilling results, and the success rate of determining well location was 100%, and tracing groundwater resources achieved remarkable results in Fengquan area, which solved the problem of water for people and livestock. Through this practical application and effect analysis of combined geophysical methods or single method in different hydrogeological conditions, the authors sumed up the choice of combination of high-density resistivity method and induced polarization method or high-density resistivity method for special hydrogeological condition in this area. The combination of geophysical methods improves accuracy and reliability of the geological interpretation, and it is popularized and applied in similar hydrogeological condition in groundwater prospecting. This application of combined mode provides the reliable and scientific basis for determining well location in process of groundwater prospecting, and it provides important function for success rate of well drilling.

Key words: arid area, groundwater, high-density resistivity method, induced polarization of symmetrical quadrupole, combination of geophysical method, Fengquan district in Xinxiang