沁河2021年“7·11”暴雨洪水重现期分析  

Analysis on the return period of the rainstorm in the Qinhe River basin on July 11,2021

作　　者：金双彦[1] 霍文博 郭邵萌[1] JIN Shuangyan;HUO Wenbo;GUO Shaomeng(Hydrology Bureau of Yellow River Conservancy Commission,Zhengzhou 450004,China)

机构地区：[1]黄河水利委员会水文局,郑州河南450004

出　　处：《水利水运工程学报》2023年第2期1-8,共8页Hydro-Science and Engineering

基　　金：国家重点研发计划资助项目(2021YFC3201101)。

摘　　要：根据沁河流域历年各时段最大降雨量和“7·11”洪水报汛雨量资料,采用P-Ⅲ型分布概率密度函数,建立了润城、五龙口、山路平、武陟等14个长系列水文站和雨量站的年最大24、6、1 h的3个代表性时段的降雨量频率曲线,计算了“7·11”洪水最大24 h大于100 mm、最大6 h大于100 mm、最大1 h大于50 mm的降雨量重现期;根据历史调查洪水、历年最大洪峰流量,建立了五龙口、山路平和武陟水文站的P-Ⅲ型频率曲线,计算了“7·11”洪水洪峰流量的重现期。结果表明:最大24 h降雨量排名第一的窑头站351 mm重现期约为3000年,最大6 h降雨量排名第一的窑头站328.5 mm重现期约为1万年,最大1 h排名前三的窑头、李寨和河西站降雨量重现期为200~300年,五龙口、山路平和武陟站洪峰流量重现期分别相当于30年、10年和10~15年。分析结果可为沁河流域和黄河下游防洪调度提供技术支撑。According to the Table 1 and Table 2 of Maximum Rainfall Data of Different Periods over the historical years and the“7·11”rainstorm in 2021 in the Qinhe River basin,the rainfall frequency curves of three representative periods of fourteen long series stations are established by using P-Ⅲdistribution,and the rainfall return period of“7·11”with maximum 24 h greater than 100 mm,maximum 6 h greater than 100 mm and maximum 1 h greater than 50 mm is calculated.According to the historical survey flood and the maximum peak discharge over the years,the frequency curves are established,and the return period of peak discharge of Wulongkou,Shanluping and Wuzhi hydrology stations are calculated.The results show that:(1)The return period of the largest 24 h rainfall reaching 351 mm in Yaotou station is about 3,000 years,that of the largest 6 h rainfall reaching 328.5 mm in Yaotou station is about 10,000 years,and that of the largest 1 h rainfall in the first three stations,Yaotou,Lizhai and Hexi,is 200~300 years.(2)The return periods of flood peak discharge of Wulongkou,Shanluping and Wuzhi stations are equivalent to 30 years,10~15 years and 10 years,respectively.The results can provide technical support for flood control operation in the Qinhe River basin and the lower Yellow River.

关 键 词：重现期 P-Ⅲ型频率曲线 “7·11”暴雨洪水 沁河流域 

分 类 号：TV122.1[水利工程—水文学及水资源]