综合电法在岩溶山区地下水勘探中的应用——以湖南怀化长塘村为例

doi:10.11720/wtyht.2020.1089

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摘要

岩溶山区水文地质条件复杂,地下水的分布规律对不同的物探方法可能存在不同的响应特征。综合采用高密度电阻率法和音频大地电磁法,在湖南怀化长塘村进行找水勘探,综合勘探结果很好地指示出异常特征和比较具体的异常位置。推断结果与钻井结果基本一致,最大涌水量大于146.88 m ³/d/。此次成果表明:对称四极反演结果能有效对地下横向电阻率的变化进行响应,且纵向上能够利用电阻率测深曲线(单支曲线)进行分层;音频大地电磁法探测深度大,能有效对地下断层构造进行响应。

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关键词 ：高密度电阻率法, 音频大地电磁法, 岩溶, 地下水勘探

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.

Key words： high density resistivity imaging audio magnetotelluric method Karst groundwater exploration

收稿日期: 2019-02-19 出版日期: 2020-03-03

P631

基金资助:国家重点研发项目(2017YFC0406104);中国地质调查局地质调查项目(DD20190562);国家自然科学基金项目(41572232)

作者简介: 邬健强(1990-),男,实习研究员,2016年毕业于中国地质大学(武汉)地球探测与信息技术专业,主要从事岩溶灾害及地下水勘探方法研究工作。Email: wjqkarst@karst.ac.cn

引用本文:

邬健强, 赵茹玥, 甘伏平, 张伟, 刘永亮, 朱超强. 综合电法在岩溶山区地下水勘探中的应用——以湖南怀化长塘村为例[J]. 物探与化探, 2020, 44(1): 93-98.
Jian-Qiang WU, Ru-Yue ZHAO, Fu-Ping GAN, Wei ZHANG, Yong-Liang LIU, Chao-Qiang ZHU. The application of electrical prospecting method to groundwater exploration in karst mountainous areas:A case study of Changtang Village, Huaihua area, Hunan Province. Geophysical and Geochemical Exploration, 2020, 44(1): 93-98.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2020.1089 或 https://www.wutanyuhuatan.com/CN/Y2020/V44/I1/93

Table 1 地层岩性一览

Fig.1 测区水文地质略图

Table 2 电阻率物性参数统计

Fig.2 1线对称四极电测深反演结果断面

Fig.3 2线对称四极电测深反演结果断面

Fig.4 1线音频大地电磁法电阻率反演断面

Fig.5 2线音频大地电磁法电阻率反演断面

Fig.6 1线375 m处三条单支曲线

Fig.7 2线375 m处三条单支曲线

Fig.8 1线地质推断解释剖面

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