关键词: 暴雨洪水; 洪水特征; 洪水成因; 流域性大洪水; 2020年长江洪水;

Abstract: A basin-wide flood occurred in Yangtze River Basin in 2020, which was just smaller than the flood in 1954 and 1998. Five numbered floods occurred in the main stream of the Yangtze River, and catastrophic flood occurred in the upper reaches of the Yangtze River. Height of water level of flood peak of Cutan station ranked the second in history records, the inflow of the Three Gorges Reservoir exceeded historical value. Flood in the Poyang Lake Basin exceeded the historical value, and water levels of the flood peak from Jianli station to Datong station ranked from the second to the fifth in history records. Tide levels from Ma'anshan to Zhenjiang River exceeded the historical value. Based on analysis about the development process of the rainstorm and flood in 2020, characteristics of that were summarized. Then, changes and requirements of flood control situation for the middle and low reach of Yangtze River were proposed, which is conductive to future flood control in the Yangtze River.

Key words: rainstorm and flood; flood characteristics; flood cause; basin wide flood; Changjiang River flood in 2020;