华北水利水电大学学报（自然科学版）2023，Vol.44Issue(6)：75-80,6.DOI:10.19760/j.ncwu.zk.2023070
基于统计估算法的可能最大暴雨递减指数研究
Study on the Decline Index of the Probable Maximum Rainfall Based on the Statistical Estimation Method
摘要
Abstract
Based on the need of engineering design,short-duration PMP estimation is one of the frontier and hot issues in PMP estimation research.The statistical estimation method and the calculation method and characteristics of rainstorm de-cline index are reviewed.Based on the advantages of statistical estimation method,a new method is proposed to calculate the fractional decline index value of PMP magnitude rainstorm by calculating the PMP value of different duration on the ba-sis of the measured rainstorm data.The Chabagou watershed is taken as an example to carry on the case analysis.The re-sults are as follows.In the PMP short duration rainstorm decline index derived by this method,n2 value during one to six hour is smaller than n3 value during six to twenty-four hour.The values of the storm recession index for each time period are basically close to the values of the equivalent magnitude once in ten thousand years design rainstorm recession index,which can reflect the characteristics of the rainstorm decline index of PMP magnitude.The results of this study may provide a new way of thinking for similar regions to derive the value of rainstorm decline index from long duration PMP to short duration PMP.关键词
短历时PMP/统计估算法/暴雨公式/暴雨递减指数Key words
short duration PMP/statistical estimation method/rainstorm formula/rainstorm decline index分类
建筑与水利引用本文复制引用
张金良,盖永岗,王鹏,罗秋实..基于统计估算法的可能最大暴雨递减指数研究[J].华北水利水电大学学报（自然科学版）,2023,44(6):75-80,6.基金项目
国家重点研发计划项目(2022YFF1300803) （2022YFF1300803）
中国保护黄河基金项目"高标准新型淤地坝理论技术研究"(2021YF013). （2021YF013）
