Research on Groundwater Vulnerability Assessment Based on Electrical Resistivity Survey

LU De-bao;HUANG Dong-jing;LI Dong-feng;SHI Zheng-tao;Zhejiang University of Water Resources and Electric Power;State key Laboratory of Hydrology-Water Resources and Hydraulic Engineering;School of Tourism and Geographical Sciences, Yunnan Normal university;

electrical resistivity survey;;groundwater;;vulnerability assessment

Groundwater vulnerability assessment is an important means to protect groundwater resources. In this paper, a groundwater vulnerability assessment method based on electrical resistivity exploration data is proposed based on the method of aquifer vulnerability index(AVI). The method acquires the apparent resistivity data through one-dimensional and two-dimensional electrical resistivity exploration, and obtains the thickness and resistivity value of the vadose zone by inversion calculation. Then the integrated electrical conductivity(IEC) can be calculated according to the established quantitative model. The integrated electrical conductivity is a reflection of the overall characteristics of the vadose zone and can describe the vulnerability of the groundwater system more accurately in the study area. The case study shows that the method is a low-cost, non-invasive, high-precision groundwater vulnerability assessment method which can reflect groundwater vulnerability objectively. Thus, the proposed method is an efficient tool to prevent groundwater pollution and protect the ecological environment.