山西省典型城市暴雨强度及雨型分析

Analysis of Rainstorm Intensity and Rainfall Pattern in Typical Cities in Shanxi Province

山西省各地市的暴雨重现期及雨峰位置参数的合理设置,对区域内的排水系统设计规划具有重要意义。利用不同降雨重现期下的山西省各地市地暴雨强度公式及芝加哥雨型分析方法,研究不同降雨重现期及雨峰参数下的山西省暴雨强度及雨型变化。结果表明:研究区域内的各地市的暴雨强度存在明显差异,综合概率暴雨强度随着降雨重现期及降雨历时的增加会出现明显的上升;各地市的雨型在特征降雨重现期及雨峰位置参数下,均呈现先增加后降低的趋势。研究结果对理解山西省特征条件下暴雨强度的归趋及雨型的变化具有参考价值,可为山西省各地市海绵城市规划及片区排水系统工程设计提供支撑。

The return period of rainstorm and the reasonable setting of rainfall peak location parameters in various cities in Shanxi Province are of great significance to the design and planning of drainage systems in the region.The formula of rainstorm intensity in various cities in Shanxi Province and the analysis method of rainfall pattern in Chicago under different rainfall recurrence periods are used to study the changes of rainstorm intensity and rainfall pattern in Shanxi Province under different rainfall recurrence periods and rainfall peak parameters.The results show that there are apparent differences in the intensity of rainstorm in different cities in the study area and the comprehensive probability of rainstorm intensity increases significantly with the increase of rainfall recurrence period and rainfall duration.The rainfall patterns in various cities show a trend of first increasing and then decreasing under the characteristic rainfall recurrence period and rainfall peak location parameters.The research results have reference value for understanding the tendency of rainstorm intensity and the change of rainfall pattern under the characteristic conditions of Shanxi Province,and can provide support for sponge city planning and drainage system engineering design in various cities in Shanxi Province.