Xinhua Full Media+丨 The Yellow River starts the water and the sandwiches to welcome the flood season

At 8 am on June 19th, the small wave bottom water conservancy hub located in Mengjin, Henan, Henan, in the middle of the Yellow River, opened three gates under the large flow of large flows, and the Yellow River was officially launched before the flood of the Yellow River before the flood. Water and sand and sand.

Since June 19, the Yellow River Water Resources Committee of the Ministry of Water Resources has jointly dispatched Wanjiazhai, Sanmenxia, ​​and Xiaolangdi Reservoir through joint dispatching, and using the water level of 3.8 billion cubic meters of the water level above 3.8 billion cubic meters to welcome the water storage and rivers of the river. Differential water and sand and sand before the flood. It is expected that this water -regulating sand and dispatching scheduling will take 20 days, and it will end around July 8.

The Yellow River is the largest sand content in the world, and the characteristics of "water less water" bring a lot of safety hazards. The measured data shows that from 1919 to 2020, the average annual sand content of the Yellow River reached 31 kilograms per cubic meter, and the average annual sediment of the midstream Tongguan Station was about 1.1 billion tons of downstream. In recent years, the amount of sand loss in the Yellow River has decreased significantly, but the problem of sediment is still the crux of the Yellow River governance.

During this year's water regulation, the Yellow River ecological scheduling and Delta ecological replenishment will be continued. Under the premise of ensuring drought resistance in the later period, the sand exhausting stasis of the reservoir as much as possible, optimizing the storage form of the reservoir, and further maintaining the stability of the water tank of the lower reaches of the Yellow River, inspecting the adaptability of the river control project, and greeting the flood season.

The small wave bottom water conservancy hub is located at the end of the last section of the gorge of the Yellow River. It is an important controlling project to prevent the lower reaches of the Yellow River. After the completion of the project in 2001, joint dispatching with Sanmenxia, ​​Lu Hun, and the County Reservoir, etc., greatly reduced the pressure of flood prevention in the lower reaches of the Yellow River.

Reporter: Yang Lin

Reporter: Zhao Shuxiang Zhang Yue Chen Siyu

Production

[Editor in charge: Ma Junqing]

- END -