2021 "China River Putty Public News" released

Recently, the Ministry of Water Resources released the 2021 "China River Putty Public News".

The scope of the "China River Putty Public News" in 2021 includes the 12 major rivers and Qinghai Lakes including the Yangtze River, Yellow River, Huaihe, Haihe, Pearl River, Songhua River, Qiantang River, Qiantang River, Tarim River, Heihe and Shule River Area. The content includes the annual measurement of the annual measurement of the river's main hydrological control station, the annual measurement of sand and the amount of sand, and its distribution during the year, and the flood -cement Saudi Said, the changes of the key river sections, the changes in important reservoirs and lakes, and important sediment incidents.

In 2021, the total runoff of the main rivers of my country's main river stations was 1427 billion cubic meters, which was basically the same as the annual average annual runoff, a decrease of 14%compared with the 2020 runoff. The average annual sand loss was 77%, a decrease of 29%compared with 2020. Among them, the runoffs of the representative station of the Yangtze River and the Pearl River in 2021 accounted for 68%and 13%of the total annual runoff of the main rivers representing stations; the annual sand volume of the representative station of the Yangtze River and the Yellow River accounted for the annual total sand transmission volume of the main rivers representative station, respectively. 31%and 52%; in 2021, the average sand content of the Yellow River, the Tarim and the Shule River is large, which is 4.33 kg/cubic meter, 1.98 kg/cubic meter and 2.80 kg/cubic meter. The sand content is less than 0.680 kg/cubic meter.

In 2021, the measured water signs of the Yangtze River Dry State Station are compared with many years. %And 9%, other stations are basically flat; the annual sand loss volume is 35%larger, and the other stations are 20%to 99%smaller. In 2021, the sediment accumulation in the river section of the main urban area of ​​Chongqing was 1.541 million cubic meters, the sediment accumulation in the Three Gorges Reservoir Reservoir area was 71.6 million tons, and the sediment accumulation in the Danjiangkou Reservoir area was 25.6 million tons.

In 2021, the Yellow River dry flow represents the measured water signs of the Saudi Arabia and many years of average value. The annual runoff of the head road is basically flat, the Longmen Station is 8%, and the other stations are 9%to 53%. The quantity is 20%to 91%. Inner Mongolia River section of Shizuishan, Sanhuhekou, and head road turn on each section, and Bayan Gaul's broken face manifested as a scouring; The dry flow volume of the Sanmenxia Reservoir was 087.8 million cubic meters; the stasis of the small wave bottom reservoir was 115.1 billion cubic meters.

In 2021, the main sediment incidents include: the collapse of the Yangtze River dry flow and the main tributary river, the jinsha rivers and the tributary of important reservoirs for the initial storage of water; severe autumn floods in the middle and lower reaches of the Yellow River. ; Floods in the Haihe River Basin leading to the overflow of the left embankment.

Source: Ministry of Water Resources Hydrological Department

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