According to historical records, from BC 185 (early Western Han Dynasty) to BC191year (late Qing Dynasty), there were 2 14 floods in the Yangtze River. During the 450 years from 1499 to 1949, Jianghan levee in Hubei Province broke 186 times. Several catastrophic floods in the Yangtze River in history are as follows:

During the period of 1788, floods occurred in the upper, middle and lower reaches of the Yangtze River. On July 23rd, the flood peak flow in Yichang was 86,000 cubic meters per second. There are more than 20 breaches in Jingjiang levee, and the flood rushed into Jingzhou city with a water depth of five or six meters. It took two months for the flood to recede.

1860 Yichang flood peak flow is about 92,500 cubic meters per second, and Zhicheng reaches 1 10000 cubic meters per second. This year's flood lasted from mid-June to late July, and a rare late flood occurred in165438+1October.

1870 The flood mainly comes from Jialing River Basin, and the peak flow in Beibei reaches 57,300 cubic meters per second. The flood affected the area from the Sichuan Basin to the plain lake area in the middle reaches of the Yangtze River, and about 30,000 square kilometers were flooded. More than 30 counties in Hubei and 20 counties in Hunan suffered from severe floods. This flood is the biggest since 1 153.

1931July-August, a basin-wide flood occurred. The affected area of the Yangtze River basin reached 6,543.8+0.5 million square kilometers, more than 50 million mu of farmland in the middle and lower reaches were flooded, 6,543.8+0.45 million people died and more than 28 million people were affected. The highest flood level in Wuhan Pass is 20.20 meters, and the water depth in most parts of Wuhan is several feet to more than ten feet. The flood lasted for three months.

1935 From July 3 to 7, five days of heavy rain occurred around Wufeng, Hubei Province, resulting in a regional catastrophic flood in the Yangtze River basin. Mainly distributed in the middle and lower reaches of Lishui and Hanshui rivers. More than 22 million mu of cultivated land was flooded,100000 people were affected, and1420000 people died.

1In July, 954, the worst flood in the whole basin occurred. The highest flood level in Hankou reaches 29.73 meters, and the peak flow reaches 76 100 cubic meters per second. The total affected area is 54 million mu, with more than 80,000 victims/kloc-0. The Beijing-Guangzhou line cannot be opened to traffic normally/kloc-0. 00 days.