Original title: Danjiangkou Reservoir has seen the largest flood into the reservoir this year. The Hanjiang Reservoir Group has achieved remarkable results in flood control and dispatch. Source: CCTV News Client
Since August 28, heavy rain has occurred in the Han River Basin, with an area rainfall of 45 mm, and the cumulative maximum point of rainfall is 327 mm in Nanniuzhuang, Nanyang, Henan. Affected by this, over-alert floods occurred in Renhe, Huangyanghe and Bahe in the upper reaches of the Hanjiang River. Among them, over-protection floods occurred in the upper reaches of the Bahe and Renhe rivers. The Chongqing Chengkou section of the Renhe river experienced the largest flood since measured data in 2005; Danjiangkou Reservoir 30 At 0 o’clock on the day, the largest flood peak flow into the reservoir this year was 23,400 cubic meters per second, and the Hanchuan section of the lower Han River exceeded the alarm.
The Ministry of Water Resources attaches great importance to flood prevention in the Hanjiang River Basin. The Yangtze River Water Resources Commission of the Ministry of Water Resources has launched a Level IV emergency response to flood and drought disaster prevention, daily rolling consultations, timely release of water regime warnings, and scientific dispatch of Danjiangkou and Pankou reservoirs to block floods and cut peaks. Reduce the pressure on downstream flood control.
As of 14:00 on August 30, the total amount of water held by the four reservoirs in Danjiangkou and Ankang, the main stream of the upper Han River during the flood, reached 1.953 billion cubic meters. Among them, the Danjiangkou Reservoir’s peak inflow flow was 23,400 cubic meters per second, the maximum outflow flow was 7,720 cubic meters per second, the peak shaving rate was 67%, and the arrested flood was 1.29 billion cubic meters; the Ankang Reservoir’s peak inflow flow was 9,130 cubic meters per second, the largest The outbound flow was 6,730 cubic meters per second, the peak shaving rate was 26%, and 223 million cubic meters of floodwater was intercepted; the flood peak flow in Pankou Reservoir was 5560 cubic meters per second, the maximum outflow flow was 2940 cubic meters per second, and the peak shaving rate was 47%. , 322 million cubic meters of floodwater was arrested; Huanglongtan Reservoir’s peak inflow flow was 3,220 cubic meters per second, the maximum outflow flow was 2,240 cubic meters per second, the peak shaving rate was 30%, and 118 million cubic meters of floodwater was arrested. By intercepting the flood peaks and shifting peaks by the upstream reservoirs, the main stream of the Hanjiang River and its tributaries Tangbai River and Nanhe River were prevented from flooding, and the water level in the middle and lower reaches of the Hanjiang River was effectively reduced by 1.5 to 3.5 meters.
It is expected that in the next three days, there will still be heavy to heavy rains in the upper and middle reaches of the Han River, and local heavy rains. There will be obvious flooding processes in the upper reaches of the Han River, and large floods may occur in small and medium-sized rivers. (CCTV reporter Chen Bo Zhouwei)
(Edited by Li Mingyi)
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