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An example of DC method for water exploration in the karst mountain water shortage area of northwest Hunan |
LI Wang-Ming, YI Qiang, LIU Sheng-Kai, XIAO Li-Quan, LI Jun |
No. 416 Geological Party, Hunan Bureau of Geology and Mineral Exploration and Development, Zhuzhou 412003, China |
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Abstract 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.
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Received: 13 December 2019
Published: 29 December 2020
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Plan of village A
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Joint profile curve(a), high density apparent resistivity profile(b) and inversion profile(c) of village A line 4
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Plan of village B
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Joint profile curve of village B line 6
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Pseudo section and inversion section of village B line 6
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Geological inference results of village B line 6
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Plan of village C
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Joint profile curve of village C line 3
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3-line apparent resistivity and apparent polarization of three pole IP sounding cross section、inversion section map and geological inference map
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