電法勘探在抗旱找水工程中的應(yīng)用

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摘要：電法勘探是物探技術(shù)的一個分支，以不同巖、礦石間的電性差異為基礎(chǔ)，通過觀測和研究天然電磁場和人工電磁場的空間與時間分布規(guī)律進行地質(zhì)勘查。地下巖石的電阻率受含水率的影響較為明顯，因此電法勘探廣泛應(yīng)用于抗旱找水工程。通過實例講述如何利用電法勘探判斷物探異常區(qū)、劃分潛力含水區(qū)，可供工程技術(shù)人員參考。

關(guān)鍵詞：電法；視電阻率；電阻異常；巖溶；含水層

中圖分類號：P641.7 文獻標識碼：A 文章編號：1008-9500（2024）06-00-03

DOI：10.3969/j.issn.1008-9500.2024.06.017

Application of Electrical Exploration in Drought Resistance and Water Finding Engineering

LUO Jianbo

（Hunan Provincial Natural Resources Survey Institute， Changsha 410000， China）

Abstract： Electrical exploration is a branch of geophysical technology that is based on the differences in electrical properties between different rocks and ores. It is a geological exploration method that observes and studies the spatial and temporal distribution patterns of natural and artificial electromagnetic fields. The electrical resistivity of underground rocks is significantly affected by water content， therefore， electrical exploration is widely used in drought resistant water finding projects. This article uses examples to illustrate how to use electrical exploration to determine geophysical anomaly areas and divide potential water bearing areas， which can be used as a reference for engineering and technical personnel.

Keywords： electricity method; apparent resistivity; abnormal resistance; karst; aquifer

武岡市地處湖南省衡邵干旱走廊的邊緣，境內(nèi)地層巖性以灰?guī)r、泥灰?guī)r為主，巖溶較為發(fā)育，在部分地勢較高的山區(qū)，降水極易流失，地表蓄水困難，地表水資源匱乏嚴重制約著這些區(qū)域居民的生活質(zhì)量和發(fā)展活力。（剩余2780字）