摘要： 土石坝渗流压力观测常常采用测压管方式实现，测压管水位的滞后效应是资料分析不可忽视的一个重要因素。渗流观测资料的分析方法很多，文章总结常用的几种定性分析方法，分析了大坝渗流异常的不同表现形式。

Abstract: The open-hole type is generally used to monitor water pressure in the body of earth-rock dam,the lag effect of water level in the hole can’t be ignored in data analysis.There are several ways in data analysis,this article sums up some ways of qualitative analysis,and describes the different represent when the dam seepage is out of the way.