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堤防内部的隐患威胁着堤防安全运行，查清隐患部位及其性质对于堤防除险加固具有重要意义。地球物理瞬变电磁法具有分辨率高、探测速度快、操作简便、没有插入地下的电极等优点，适合于堤防隐患和渗漏探测的特殊要求。作者研制成功一系列堤防和土坝隐患渗漏探测专用瞬变电磁仪。本文介绍瞬变电磁法工作原理及ＳＤＣ－３型堤坝渗漏探测仪在现场应用情况。
The hidden dangers inside the embankment threaten the safe operation of the embankment and find out the hidden parts and their nature are of great significance for the reinforcement of the embankment. Geophysical transient electromagnetic method has the advantages of high resolution, fast detection speed, easy operation, no electrode inserted underground, and the like, and is suitable for the special requirements of embankment hidden dangers and leakage detection. The author has successfully developed a series of dike and earth dam hidden leak detection special electromagnetic transient. This article describes the working principle of transient electromagnetic method and SDC-3 levee leakage detector in the field application.