2020年滁河洪水调度实践与分析

2020年梅雨期安徽省长江、淮河、新安江流域同时发生大洪水,历史罕见.滁河流域属于长江流域,发生超警戒水位洪水,上游襄河口闸以上发生超历史记录水位洪水,历史上第5次启用荒草二圩、荒草三圩蓄洪区分洪蓄水.通过水库蓄水量变化反推水库拦蓄的流量过程和利用各圩区蓄滞水量进行三角形概化反推入圩流量过程并结合水位—流量关系曲线,分...

The practice and analysis of flood dispatching in Chuhe River Basin in 2020

The Yangtze River,Huaihe River and Xin’anjiang River witnessed heavy flood simultaneously during Meiyu period in 2020.It’s rarely happened in history.The Chuhe River Basin is a tributary basin to Yangtze Riv?er Basin,which witnessed the flood exceeded altering water level.The water level above Xianghekou Sluice in up?stream has exceeded the historical highest water level.The Huangcao Twice Dike and Huangcao Third Dike ap?plied to store water the fifth time in history.This paper mainly uses the reservoir’s storage flow process reverse es?timated by changes of reservoir storage and the inter dike flow process reverse estimated by the generalized trian?gles of each dike water storage capacity,combined stage-discharge relationship curve,analyzes the effects of the large reservoir’s dispatching,the medium reservoir’s storage and the application of Huangcao Twice Dike and Huangcao Third Dike in reducing the peak and water lever of flood peak.The corresponding station’s water level reduced about 0.5~1.5 meters,which effectively mitigated the flood prevention pressure of the downstream reach.