What year was the great flood in history?

When was the last catastrophic flood? 1998.

1998 floods mainly occurred in the Yangtze River, Nenjiang River and Songhua River. The Yangtze River flood is one of the most serious floods in the whole basin in the 20th century, following the two floods of 193 1 and 1954. The floods in Nenjiang River and Songhua River are also the worst floods in the whole basin since 150 years.

According to preliminary statistics, 29 provinces (autonomous regions and municipalities) in China have suffered from floods to varying degrees, among which Jiangxi, Hunan, Hubei and Heilongjiang provinces are the most seriously affected. The affected area is 3/kloc-0.80 million mu, the affected area is/kloc-0.96 million mu, the affected population is 223 million, 4 150 people died, 6.85 million houses collapsed, and the direct economic loss reached/kloc-0.66 billion yuan.

Extended data:

Through analysis, the Yangtze River 1998 flood is mainly caused by abnormal climate, excessive rainstorm, decreased storage capacity of rivers and lakes, reduced peak clipping and elevated water level. The comparison between the maximum flood peak discharge and the maximum flood volume in the 60 days below Jingjiang River shows that 1998 flood is generally less than 1954, and the three floods in the whole basin in this century (193 1, 1954, 1998

The flood level in the middle and lower reaches of the Yangtze River 1998 greatly exceeded the measured water level in 1954. The main reasons for the high flood level are as follows:

At 1 and 1998, the flood regulation capacity is greatly reduced compared with 1954. 1954, the total amount of flood diversion breaches in the middle and lower reaches of the Yangtze River reached102.3 billion cubic meters, while 1998 was only 100 billion cubic meters.

2. The water storage capacity of the lake has decreased. Since the founding of New China, the area of the same rivers and lakes in the middle and lower reaches of the Yangtze River has decreased by about 65.438+0.8 million square kilometers, and Dongting Lake and Poyang Lake have decreased by more than 65.438+0.8 billion cubic meters due to siltation and reclamation.

Summing up experience mainly includes: full preparation before flood season; Unified command and correct decision; Military-civilian joint defense, full rescue; Reservoir dispatching, scientific emergency rescue; Administer water according to law and strictly enforce the law. In post-disaster reflection, we should pay close attention to the following work: heightening and strengthening dikes to eliminate hidden dangers of dikes; Strengthen river regulation to keep the flood unblocked; Construction of flood diversion and storage areas; Do a good job in leveling embankments and flooding, returning farmland to lakes, and building towns by immigrants; Pay close attention to the construction of flood control reservoirs; Strengthen soil and water conservation in the middle and upper reaches of the Yangtze River; Improve modern flood control technology.

Baidu encyclopedia-1998 catastrophic flood