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电磁测深法原是用于地球物理勘探的，笔者将这一无损探测方法应用于土坝渗流通道的探测取得成功．其优点为操作简便、迅速、无需电极，测量一点需2min，位置分辨高，横向测站距离可任意设置；纵向深度分辨率可达3～6m，测深系统由发射部分和接收部分组成，发射部分包括发射线圈、发射机和电源；接收部分包括接收线圈、接收机．该仪器在山东省曲阜市尼山水库进行了大坝坝体、基岩、断层、地下河和山体的渗漏探测，其结果与多年人工观测结果相符合，并发现一些细部构造和以前未曾发现的漏水处．
Electromagnetic sounding method was originally used for geophysical exploration, the author of this nondestructive detection method applied to earth dam seepage channel exploration success. The advantages of simple, fast, without electrodes, measuring a little 2min, high position resolution, horizontal station distance can be arbitrarily set; vertical depth resolution of up to 3 ~ 6m, sounding system consists of transmitting part and receiving part, firing The part includes a transmitting coil, a transmitter and a power supply. The receiving part includes a receiving coil and a receiver. The instrument detects the leakage of dams, bedrock, faults, underground rivers and mountains in the Nishan Reservoir, Qufu City, Shandong Province. The results are in line with the results of many years of human observation and some fine structures and previously undetected Leakage Department.