本文介绍了水位骤变时,堤坝不稳定渗流的计算方法。数学模型将堤坝内饱和区与非饱和区耦合在一起,构成整体的分析模型,并给出其数值解的差分格式和求解步骤。通过实例计算与试验对比,结果基本上一致。在水位骤升骤降条件下,采用本法计算的浸润线具有良好的趋势和规律性。 This paper introduces the calculation method of unsteady seepage of dams when the water level suddenly changes. The mathematical model couples the saturated zone and the unsaturated zone in the embankment to form the overall analysis model, and gives the difference scheme and solving procedure of the numerical solution. Comparing with the experiment through the example, the result is basically the same. In the sudden rise and fall of the water level conditions, the use of this method soaked line has a good trend and regularity.