水库蓄水以后,水逐渐经由坝体、坝头、坝基向下游渗透。在坝设计时对渗透计算都是考虑固定水位(如设计水位、正常高水位等)。而水库投入运用以后,一般情况是最高库水位或设计水位的持续时间极短,其他的特征水位(除死水位以外)的持续时间变化频繁。因此,有些水位对于坝体形成浸润线的影响就不占显著地位。以往有些对观测资料分析的 After the reservoir water, water gradually through the dam, dam head, dam foundation to the downstream infiltration. In the design of the dam infiltration calculation is to consider a fixed water level (such as design water level, the normal high water level, etc.). After the reservoir is put into operation, the general situation is that the duration of the highest reservoir water level or design water level is extremely short, and the durations of other characteristic water levels (except the dead water level) change frequently. Therefore, the effect of some water level on the formation of infiltration lines in the dam is not significant. In the past some of the observed data analysis