中文摘要：

由于岩石的电阻率参数对地下岩石内孔隙流体含量及其连通性有很好的反映，所以近年来用电磁法探测地下电阻率分布的技术，被广泛应用于地下水的探查中。本文介绍了利用瞬变电磁法（TEM）和大地电磁法（MT）分别在不同深度范围探查地下水的两个实例。结果表明，依据勘探目标层深度的不同，选择适宜的电磁方法，进行地下水的探查，可以获得关于地下水赋存状况的信息。

英文摘要：

The electricity is sensitive to the subsurface fluids and the connectivity of the rocks. EM methods are widely used in the detection of ground water. Two examples are introduced for detection of ground water developed at different depths, which are carried out by using TEM and TM methods respectively. TEM was used in a coal mine for shallower depth. MT was used in a deeper prospecting. The results were accepted by users.