摘要
以合肥市董铺和大房郢水库为研究对象,分析了应对2020年0717号洪水典型防洪调度方案及其防洪效果。董铺水库削峰率78.9%,最大拦蓄水量0.385亿m^(3),大房郢水库削峰率67.4%,最大拦蓄水量0.361亿m^(3),系统总结了南淝河流域面对极端降雨条件的防洪调度措施;分析了在历史极值降雨强度下分别以安全取水位、安全供水水位及主汛期汛限水位为起调水位进行不泄洪调度方案,在历史最大1日与历史最大3日面降雨量情况下三种起调水位最高水位均低于相应设计洪水位。结果表明:在1~3日极值降雨情况下,若下游城市河道南淝河和巢湖防洪排涝压力大,可以采用不泄洪的调度策略,为推进水库优化调度,统筹合肥市城市防洪安全与供水安全提供参考。
Taking Dongpu and Dafangying reservoirs in Hefei City as the research objects,this paper ana-1yzed the typical flood control dispatch scheme and its flood control effect in response to the flood on Ju1y 17,2020.The peak reduction rate of Dongpu reservoir was 78.9%,with a maximum storage capacity of 38.5 mi1lion cubic meters.The peak reduction rate of Dafangying reservoir was 67.4%,with a maximum storage capacity of 36.1 mi1lion cubic meters.The flood control dispatch measures for the Nanfei River Basin under extreme rainfal1 conditions were systematically summarized.The paper analyzed the non-spi1l flood control dispatch schemes starting from the safe water intake 1eve1,the safe water supp1y 1eve1,and the f1ood 1imit water 1eve1 during the main f1ood season under historica1 extreme rainfall intensity.Under the historical maximum 1-day and maximum 3-day rainfa1l conditions,the highest water 1evel of the three starting water 1eve1s was 1ower than the corresponding design f1ood 1eve1.The results showed that under extreme rainfa1l conditions on the first to third day,if there was great pressure on flood contro1 and drainage in downstream urban rivers such as Nanfei River and Chaohu Lake,the non-spi1l flood control dispatch strategy could be adopted to provide reference for promoting the optimization of reservoir dispatch and overal1 f1ood controled safety and water supply safety in Hefei City.
作者
单开进
张正东
闫亚廷
SHAN Kaijin;ZHANG Zhengdong;YAN Yating(Hefei Water Bureau,Hefei 230071,China;Hefei City Dongpu Dafangying Reservoir Management Office,Hefei 230031,China;Power China Northwest Engineering Co.,Ltd.,Xi'an 710065,China)
出处
《江淮水利科技》
2023年第2期37-43,I0001,I0002,共9页
Jianghuai Water Resources Science and Technology
关键词
防洪调度
极端降雨
南淝河流域
合肥城区
f1ood control dispatch
extreme precipitation
Nanfeihe River Basin
Hefei City
作者简介
单开进(1966—),男,主要从事水资源规划建设管理及水环境治理、防洪治理、水行政管理等工作。E-mail:2271134743@qq.com。
