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The application of electrical prospecting method to groundwater exploration in karst mountainous areas:A case study of Changtang Village, Huaihua area, Hunan Province |
Jian-Qiang WU1,2, Ru-Yue ZHAO3, Fu-Ping GAN1,2, Wei ZHANG1,2, Yong-Liang LIU1,2, Chao-Qiang ZHU1,2 |
1. Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, China 2. Karst Dynamics Laboratory, MLR&GZAR, Guilin 541004, China; 3. Wuhan Geomatics Institute, Wuhan 430022, China |
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Abstract The hydrogeological conditions in karst mountainous areas are complex, and the distribution of groundwater may have different response characteristics to different geophysical methods. In this paper, the high density resistivity method and audio magnetotelluric method were synthetically used to study the application of groundwater exploration in Changtang Village, Huaihua area. The comprehensive exploration results are better indicate the anomalous characteristics and specific anomalous locations. The inferred results are basically consistent with the drilling results, and the maximum water inflow is greater than 146.88 m 3/d。The study results show that symmetrical four-pole sounding inversion can effectively respond to the changes of underground transverse resistivity, and the resistivity sounding curve (single branch curve) can be used to make stratification vertically, the results of stratification are basically consistent with the results of drilling.The audio magnetotelluric method has a large detection depth and can effectively respond to subsurface fault structures.
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Received: 19 February 2019
Published: 03 March 2020
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地层 | 地层代号 | 岩性 | 第四系 | Q | 暗灰色砂质黏土,黏质砂土,砂卵石层 | 二叠系下统茅口组 | P1m | 浅灰色厚层状灰岩、白云质灰岩,含少量硅质团块 | 二叠系下统栖霞组灰岩段 | P1q2 | 灰、深灰色厚层灰岩、白云质灰岩,含硅质条带、团块 | 二叠系下统栖霞组含煤段 | P1q1 | 灰白色中细粒石英砂岩,黏土岩夹黑色页岩 | 石炭系上统船山群 | C3ch | 浅灰白色中~厚层状灰岩、白云质灰岩,泥质灰岩 | 石炭系中统黄龙群 | C2hn | 灰、灰白色厚层灰岩、白云质灰岩及白云岩 | 震旦系下统南沱冰碛岩组 | Zant | 含砾粉砂岩,冰碛砾岩,泥砾岩 | 马底驿组第三段 | Ptbnm3 | 灰色绢云母粉砂质板岩,灰、灰黑色含炭凝灰质板岩 |
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Strata in the survey area
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Hydrogeological map of measured area
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介质类型 | 变化范围/(Ω·m) | 平均值/(Ω·m) | 黏土 | 0.1~55 | 25 | 卵石 | 35~300 | 150 | 白云质灰岩 | 210~10000 | 2000 |
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Parameter of resistivity for various media
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Profile showing symmetrical four-pole sounding inversion results of line 1
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Profile showing symmetrical four-pole sounding inversion results of line 2
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Profile showing audio magnetotelluric resistivity inversion of line 1
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Profile showing audio magnetotelluric resistivity inversion of line 2
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Three single apparent resistivity sounding curve of line 1 beside 375 m
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Three single apparent resistivity sounding curve of line 2 beside 375 m
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The profile of geological inference and interpretation of line 1
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