Wastel lakes are expected to not increase significantly, and the downstream hydropower stations have freely disappeared.
Author:Red Star News Time:2022.09.06
At 12:52 on September 5, a magnitude 6.8 earthquake occurred in Luding County, Ganzi Prefecture, Sichuan Province. After the earthquake, the mountain of the right bank of the East Village of Wan Village, Luding County collapsed, blocking the deeds of the right main branch of the East River to form a dammed lake.
On the afternoon of September 6, Red Star reporters learned about the latest situation of the dammed lake from the Earthquake Rescue Working Group of the Sichuan Water Resources Department. It is reported that the Wandong River is also known as the two forchas and Shui Gaiti, which belongs to the tributary of the right bank of the Dadu River. It originated from the southern foot of Gongga Mountain. The river is 28 kilometers long and the basin area is 168 square kilometers.
Through on -site inspections, satellite remote sensing, drone air auction and other comprehensive analysis, the Dadu River's right bank 1 -level tributary Bay Donghe Basin appeared on the right bank of the Dadu River. The lives and property of the people of the upstream and downstream people. The maximum dammed body is about 330 meters wide and about 60-70 meters high. It is estimated that the amount of landslide is about 800,000 cubic meters, forming a dammed lake. The other two dammed bodies, the quantity of the landslide is relatively small, and has not formed a dammed lake. According to analysis, the flow of the East River estuary of the Qianwan of the Earthquake was 10.4 cubic meters per second. According to the estimation of the river interruption time, the amount of water late for the dammed lake was expected to be about 600,000 cubic meters.
The Sichuan Provincial Department of Water Conservancy on the site stated that in the early morning of September 6, it was monitored to find that the Wan Donghe River had resumed overcurrent, and it was expected that the damage and lakes of the dammed and lake will not increase significantly.
▲ Natural overcurrent scene
In addition, at the end of the Wan Donghe, the Dadu River Dagang Shanxi Hydropower Station (its total library capacity of 777 million cubic meters and the adjustment library capacity was 117 million cubic meters) warehouse area. At present The lake in the Donghe dammed lake in Nawan is stunned. The dammed lake has little impact on the Dadu River dry flow and the Dagangshan Power Station's downstream. "The risk of the Lake Lake of the Wan Donghe Chat is generally controllable," said the staff of the working group in front.
In view of the general controllable risks of the Lake Lake of the Wandong River, considering the secondary disaster caused by subsequent aftershocks and heavy rainfall, the working group in front of the Sichuan Provincial Department of Water Resources suggested that Anneng Company and the Armed Police Force have arrived at the scene. Wait.
"In the future, we will closely pay attention to changes in rain, water conditions, and dammed body, timely study and judge and analyze, and take measures to ensure that the damage risk of damping the dams of dammed lakes is completely eliminated." Said the relevant person in charge of the Earthquake Rescue Working Group of the Sichuan Water Resources Department.
Red Star Journalist Lin Cong Video According to the Sichuan Provincial Department of Water Conservancy
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