In August, the Yangtze River immediately reached the fourth serious flood this year. Affected by the upstream water, the flow of Cuntan Hydrological Station (Jiangbei, Chongqing) in the upper reaches of the Yangtze River rose to 50,900 cubic meters per second at 5: 00 on June 5438+04. According to the flood numbering regulations of major rivers in China, the incoming water meets the flood numbering standard, and the number is? No.4 flood of the Yangtze River in 2020? .
The No.4 flood of the Yangtze River in 2020 is a flood that occurred on August 4, 2020 in the upper reaches of Tuojiang River, Fujiang River and Minjiang River, and in the main stream from Luzhou to Cuntan River (Jiangbei and Chongqing).
In the past few days, the Yangtze River Committee has held meetings and chambers of commerce in succession to analyze and judge the flood development trend in the Yangtze River basin, and arrange the deployment of heavy rainfall prevention and response and important reservoir dispatching work in the upper reaches of the Yangtze River. The meeting stressed that at present, there are still many stations in the middle and lower reaches of the Yangtze River operating at high water level. Due to heavy rainfall, many stations in the upper reaches of the Yangtze River, such as Minjiang River, Fujiang River and Jialing River, exceeded the police or even the insurance, and the flood control situation was very severe.
Since the flood season this year, the most important reason why the rainfall in flood season is so fierce, lasting for a long time and having enough stamina is the good water vapor condition. There have been several rounds of heavy rainfall in southern China, which has led to serious floods in many places.
As the largest water conservancy control project in the world, the Three Gorges Dam has no doubt about its own construction strength. The Three Gorges Project is the most direct and effective measure to control and regulate the flood in the upper reaches of the Yangtze River, and it is also the most direct and effective measure to reduce the flood threat in the middle and lower reaches and prevent devastating disasters in the Yangtze River. It is at the core of the Yangtze River flood control system. For the upstream water, it is impossible for the Three Gorges Dam to swallow it in one gulp, and flood discharge is inevitable. On the other hand, the Three Gorges can only intercept the floods in the upper reaches, but cannot intercept the floods caused by rainfall in the middle and lower reaches. If there is a flood caused by rainfall in the area below the Three Gorges, there is nothing the Three Gorges Dam can do. Regarding the fourth flood, the Three Gorges should be able to survive.