摘要
Abstract
In the main flood season of 2020,the Xishui River Basin,a tributary of the Yangtze River,experienced an ultra-long Meiyu period of 43 days,and suffered nine consecutive rounds of heavy rainfall attacks,resulting in a sharp rise in the water level of reservoirs and rivers in the basin.The Bailian River Reservoir in the basin has opened 10 holes for flood discharge for the first time since its completion,resulting in basin flood disasters.In order to find potential risks and opportunities,the problem is examined from multiple perspectives.The'2020.7.6'rainstorm in the Xishui River Basin is used to construct a distributed hydrological model of the small watershed above the Bailianhe Reservoir by using FFMS software.The hydrological and hydrodynamic model is used to carry out the re-disc deduction of rainstorm flood process,and the influence of the'2020.7.6'rainstorm process in Xishui River Basin and the full-opening flood discharge of 10 holes in Bailianhe Reservoir on the downstream is analyzed.The results of re-disc deduction are consistent with the design value of rainstorm flood,the measured characteristic value and the comparison of four extreme rainstorms in history,and the error range is not exceeded.The results can provide scientific support for future flood control operation,disaster prevention and mitigation.关键词
浠水流域/分布式水文模型/二维水动力/暴雨洪水/复盘推演Key words
Xishui River Basin/distributed hydrological model/two-dimensional hydrodynamic/rainstorm floods/complicated disc deduction分类
水利科学
