During the flood of 1998, the high water level at Nanjing Station in Jiangsu Province reached 9.90m on July 6, and the highest water level at Dongshan Station of Qinhuai River 10.28m was the third in history, and the highest water level at Xiaoqiao Station of Chuhe River reached 1 1.29m, which exceeded the warning water level1.78m.

On July 29th, the highest tidal level at Nanjing Station was 10. 14m, ranking second in history, and it lasted for 17 days above/kloc-0.0m. The high tide level at Zhenjiang Station on August 24th was 8.37m, only lower than 1954/kl.

Extended data:

1998 The main reasons for the formation of high flood level;

The flood storage capacity at 1 and 1998 is significantly lower than that at 1954. 1954 The total amount of flood diversion breaches in the middle and lower reaches of the Yangtze River was 1023 billion cubic meters, while 1998 was only 1000 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.

References:

Baidu encyclopedia-1998 catastrophic flood