The floods in China are 1998, 1954, 193 1 year. Among them, 1998 is another basin-wide catastrophic flood in the 20th century after 193 1 and 1954. The floods in Nenjiang River and Songhua River are also the worst floods in the whole basin since 150 years.

1998 flood situation:

Since mid-June, the flow of the Yangtze River has increased rapidly due to the continuous heavy rain and heavy rain in Dongting Lake and Poyang Lake. Affected by the upstream inflow and flood season, the tidal level along the Yangtze River in Jiangsu Province has exceeded the warning level since June 25th. The climax of Nanjing Station is located on July 6th, reaching 9.90 meters. The area along the Yangtze River in southern Jiangsu entered Mei from June 24th to July 6th.

Because of the high tide level along the river, the drainage of inland river is blocked, which has formed a severe situation of flood disaster. The highest water level at Dongshan Station of Qinhuai River 10.28m is the third in history. The highest water level at Xiaoqiao Station of Chuhe River reached 1 1.29 m, which exceeded the warning water level 1.79 m. ..

From late July to early September, influenced by seven consecutive flood peaks in the upper reaches of the Yangtze River and the confluence of tributaries in the middle reaches, the maximum flow of Datong Station reached 82,300 m3/s on August 2, second only to the flood peak flow 1954, ranking second in history.