关于城市暴雨强度公式推求的研究

Derivation of Urban Storm Intensity Formula

城市暴雨强度公式的准确性直接影响着城市排水管网的规划设计,老一代的暴雨强度公式已经不能正确反映当地的降雨规律,亟需重新修订。本文以郑州市降雨资料为例,采用年最大值法选样和年多个样法选样对公式进行推求,通过对比分析发现年最大值法操作简单,误差更小,该方法有利于新一轮暴雨强度公式修编的普及。

The accuracy of urban storm intensity formula directly affects the planning and design of urban pipe network.The existing formula which can not reflect the characteristic of local rainfall should be revised.In this paper,we took the rainfall data of Zhengzhou as an example to derivate urban storm intensity formula by two different storm sample selection methods （the annual maximum value method and annual multi-sampling method）.Comparing these two methods,we found the annual maximum value method is not only easy operation,but also can be used to make contrastive analysis with hydraulic engineering in the same condition.This method benefits popularizing and revising urban storm intensity formula.