人民长江2024，Vol.55Issue(1)：105-112,8.DOI:10.16232/j.cnki.1001-4179.2024.01.015
汶川县降雨时空分布特征及设计暴雨频率分析
Analysis on spatial and temporal distribution characteristics of rainfall and designed rainstorm frequency in Wenchuan County
摘要
Abstract
To reduce the loss caused by spatio-temporal heterogeneity of rainfall and designed rainstorm to Wenchuan County,and reveal the spatio-temporal distribution characteristics of rain fall and the characteristics of designed rainstorm in Wenchuan County,based on the GPM satellite rainfall data from 2001 to 2020,Mann-Kendall method are used to analyze the spatial and temporal changes of rainfall in Wenchuan County from time scales of year,month,flood season,day and different scales of magni-tude,and Stochastic Storm Transposition(SST)method is used to analyze the frequency of designed rainstorm.The results show that:① the annual total rainfall in Wenchuan County shows a significant growth trend,which is mainly affected by the rainfall changes in the flood season.② The spatial distribution of rainfall is uneven.Light rain is mainly distributed in the southwest of Wenchuan County,and moderate rain to rainstorm is mainly distributed in the east of Wenchuan County.③The designed rainfall results obtained based on SST method are reliable;with the increase of rainfall duration,the designed rainstorm center has a tend-ency to move from the southwest to the central and eastern part of Wenchuan County;the spatial non-uniformity of the designed rainstorm is more significant for small return period.The research results can provide reference for rainstorm and flood control in Wenchuan County.关键词
降雨时空分布/设计暴雨/随机暴雨移置法/汶川县Key words
spatio-temporal distribution of rainfall/designed rainstorm/stochastic storm transposition/Wenchuan County分类
建筑与水利引用本文复制引用
谢雅洁,刘曙光,周正正..汶川县降雨时空分布特征及设计暴雨频率分析[J].人民长江,2024,55(1):105-112,8.基金项目
国家重点研发计划项目(2018YFD1100401) （2018YFD1100401）
