短历时可能最大暴雨的一种计算方法

One Calculating Method for Probable Maximum Precipitation of Short Duration

针对短历时暴雨资料较少,尤其针对高效特大短历时实测暴雨资料较少、推求短历时可能最大暴雨PMP较困难,目前尚无成熟的方法可以借鉴,推荐了先推求24 h可能最大暴雨PMP,然后再采用暴雨公式推求短历时PMP方法,并应用于实际工程中,计算结果较为适用合理。

Using hydrometeorological theory and methods,probable maximum precipitation can be figured out.For both high risk storage works and other importance projects,this is one important method of design for flood controlling and draining flooded field.The data for calculating the probable maximum precipitation of 24 h is abundant and the methods are mature.But short duration data of rainstorm are insufficient,especially the data of extraordinary storm,so calculating the PMP of short duration is relatively difficult and there is no mature method for it.In this paper,a new method,calculating the PMP of 24 h firstly,then calculating the the PMP of short duration by using rainstorm formulation,was presented and applied to the practical engineering,and reasonable results are obtained.