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通过实例，介绍了自然电场法的防渗监测技术，可用于探明堤坝的渗漏范围、方位和埋深。该法具有仪器设备简单、操作方便，分析易懂，得到的病险部位电性曲线反映直观，费用低。通过３年的实践研究，认识到在病险堤坝中，只要有水流渗入，就具有过滤场的条件，应用自然电场法探测，就能产生较好的效果．工程测区接地条件良好是测试效果的保证，所以该法最适用于土质堤坝等较均质接地条件的测区。必须根据探测对象的具体条件，选择适宜的探测方法．
By examples, the impermeable monitoring technology of natural electric field method is introduced, which can be used to find out the leaking range, azimuth and depth of embankment. The method has the advantages of simple equipment, convenient operation, easy to understand analysis, direct and low cost of the electrical curve obtained from the diseased parts. Through 3 years of practical research, I realized that in a dyke with a dangerous condition, as long as there is infiltration of water, it has the conditions of a filtration field. By using the natural electric field method, good results can be obtained. The good grounding conditions in the project area are the guarantee of the test results, so the method is most suitable for the test areas which are more homogeneous ground conditions such as the earth dam. According to the specific conditions of the detection object, select the appropriate detection method.