2020年梅雨期长江流域安徽区域暴雨洪水过程及特性分析

Analysis of rainstorm and flood characteristics of Yangtze River Basin(Anhui Region)during the East Asian rain season

为总结2020年暴雨洪水特性,详细分析了2020年暴雨洪水过程,介绍了水库调度及圩区分洪情况。结果表明:2020年梅雨期时间长,降雨强度大,累计雨量大。洪水呈现范围广、总量大、高水位持续时间长的特点。长江干流高水位受安徽区间洪水影响大,滁河洪水以滁河干流襄河口以上来水为主。研究成果可为长江流域安徽区域防汛工作提供参考。

In order to summarize characteristics of rainstorms and floods of Yangtze River Basin(Anhui Region)during the East Asian rain season(from June 10 to August 1)in 2020,the rainstorm and flood processes were analyzed in detail,operation of reservoir and polder area flood diversion were introduced.The results showed that the East Asian rain season in 2020 was long,with heavy rainfall intensity and large accumulated rainfall and the floods were characterized by wide range,large amount and long high water level time.The high water level of the main stream of Changjiang River was greatly affected by the floods in Anhui,The Chuhe River flood mainly came from the upstream of Xianghekou.The results can provide reference for flood control in Yangtze River Basin(Anhui Region)Yangtze River basin.