Is the flood in Chongqing serious?

At 4: 00 am on August 20th, 2020, the water level of Cuntan Hydrological Station on the Yangtze River in Chongqing rose to 1.9 1.47m, which broke the measured record of1.981.091m after the founding of the People's Republic of China, and was also the highest in Chongqing. ?

At 8: 00 a.m. 15 a.m., the water level of Cuntan Hydrological Station rose to191.62m, which was 8.12m higher than the guaranteed water level and 2 1 higher than the annual maximum water level of198.

Although the flood level is extremely high, most areas in the main urban area of Chongqing are still safe, because most buildings in the main urban area of Chongqing are relatively high and the flood threat is very small. However, both Jialing River and low-lying areas along the river were obviously affected by floods, and many people had to evacuate urgently.

Extended data

There are three main reasons for this rare catastrophic flood in Chongqing. Zhang Na, deputy director of the Hydrological Forecasting Office of the Upstream Bureau of the Yangtze River Committee, said that in recent days, there has been a large area of heavy rainfall in the upper reaches of Chongqing, resulting in a large flood peak.

Minjiang River, Tuojiang River, Jialing River, Fujiang River and other rivers have exceeded the police and insurance at the same time, forming a multi-flow collection in the Chongqing section of the Yangtze River and Jialing River; In addition, the last flood peak of the two rivers has just crossed the border, and the water level has not receded. The two flood peaks are superimposed before and after.

Although Chongqing has been scorching in the sun recently, neighboring Sichuan has been hit by a rainstorm "wheel war". At 5: 00 on August 18, Sichuan started the Class I flood control emergency response, which was the first time in Sichuan's recorded history.

The main streams and tributaries of Minjiang, Tuojiang and Jialing Rivers in the Yangtze River Basin in Sichuan Province have experienced continuous heavy rain, heavy rain and local heavy rain, and the continuous heavy rainfall has caused historical peak flow in several tributaries of Minjiang, Tuojiang and Fujiang.

"The floods in the two rivers have a short interval and are superimposed together to form a jacking trend, which is difficult to reach the peak." Song Gangyong, director of the Hydrological Prevention Department of Chongqing Water Resources Bureau, explained that for the upper reaches of the Yangtze River, when the flow of Cuntan Hydrological Station or the inflow of Three Gorges Reservoir reaches 50,000 cubic meters per second, it will be numbered; Jialing River, Fujiang River and Xiaoheba Station, a tributary of Jialing River, are numbered if the warning water level exceeds 238 meters.

From July 2 to August 20, there were five numbered floods in the Three Gorges Reservoir, and it was only three days from the formation of the No.4 Yangtze River flood in August 14 to the formation of the No.5 Yangtze River flood in August 17. "Jialing River 1" flood and "Jialing River No.2" flood are only four days apart.

In addition, Chongqing, the central city, is located at the intersection of the Yangtze River and Jialing River, at the tail of the Three Gorges reservoir area. The Minjiang River and Tuojiang River in the upper reaches of the Yangtze River valley cross the central city of Chongqing from southwest to northeast, and the Fujiang River and Qujiang River in the upper reaches of the Jialing River valley join the Yangtze River in Chaotianmen, Chongqing from north to south, resulting in a long duration of high water level in the main city of Chongqing.

"The floods in the two rivers have a short interval and are superimposed together to form a jacking trend, which is difficult to reach the peak." Song Gangyong, director of the Hydrological Prevention Department of Chongqing Water Resources Bureau, explained that for the upper reaches of the Yangtze River, when the flow of Cuntan Hydrological Station or the inflow of Three Gorges Reservoir reaches 50,000 cubic meters per second, it will be numbered; Jialing River, Fujiang River and Xiaoheba Station, a tributary of Jialing River, are numbered if the warning water level exceeds 238 meters.

China News-Chongqing has issued a red warning for floods, and 36 rivers have exceeded the warning.