In the water shortage area of karst mountain in northwest Hunan, the terrain condition is complex and the electromagnetic interference is strong. In the groundwater exploration, the DC method with strong anti-interference capability is preferred. The engineering practice shows that, when the terrain is relatively gentle and the exploration depth is relatively shallow (about 0~150 m), the small distance combined section method of apparent resistivity + high-density resistivity method is adopted, and when the terrain condition is poor or when the exploration depth is relatively deep (about 0~400 m), the small distance combined section method of apparent resistivity and three-pole IP sounding method are used, and proper inversion and interpretation are carried out, which not only improves the working efficiency but also solves the practical problems, and achieves better water finding effect.
李望明, 易强, 刘声凯, 肖利权, 李俊. 湘西北岩溶石山缺水地区直流电法找水实例[J]. 物探与化探, 2020, 44(6): 1294-1300.
LI Wang-Ming, YI Qiang, LIU Sheng-Kai, XIAO Li-Quan, LI Jun. An example of DC method for water exploration in the karst mountain water shortage area of northwest Hunan. Geophysical and Geochemical Exploration, 2020, 44(6): 1294-1300.
Chen Y X, Wei J Y, Yu L P, et al. Discussion on the types and causes of the anomalies of the electric sounding method in the karst mountainous area of South Guizhou[J]. Hydrogeology and Engineering Geology, 2012,39(3):17-22.
李金铭. 地电场与电法勘[M]. 北京: 地质出版社, 2005.
Li J M. Geoelectric field and electrical prospecting[M]. Beijing: Geological Publishing House, 2005.
王宇玺. 高密度电阻率法的主要装置特点与应用[D]. 成都:成都理工大学, 2010.
Wang Y X. Characteristics and application of main devices for high density resistivity method[D]. Chengdu: Chengdu University of Technology, 2010.
Gao Y, Xiong H S, Peng M T, et al. High density electrical prospecting anomaly analysis of water-bearing structure in karst area of southeast Chongqing[J]. Geophysical and Geochemical Exploration, 2016,40(6):1108-1115.
Chen S, Yu S W, Liu H Q, et al. Application and research of high density resistivity method in hydrogeological prospecting-A case study on Jiangping town map[J]. Progress in Geophysics, 2017,32(2):849-855.