What methods can be used to eliminate the danger when the dam of Wolong Longtan Power Station overflows?

In the early morning of August 20th, torrential rain in Wolong, Sichuan Province caused flash floods and mudslides, and the flood gate of Longtan Hydropower Station in Wolong, Sichuan Province could not be opened, which led to the danger of flooding. At present, the local people are organizing people on both sides of the river to avoid danger urgently. According to CCTV news Weibo on August 2 1, as of August 2 1 day 13:00, 96 people and tourists were trapped in the area above Longtan Power Station in Wolong Special Zone, and 8 people lost contact.

On the afternoon of August 2 1, this newspaper learned from Sichuan Fire Rescue Corps that rescuers had rescued 70 people near the hydropower station, of which 17 people had been transferred by helicopter.

On the evening of August 2 1, the paper learned from the Ministry of Water Resources that according to the on-site inspection by the working group of Sichuan Water Resources Department of the Ministry of Water Resources and the personnel of the power station on the morning of August 2 1, the water level of the hydropower station is about 164 1 m, which exceeds the designed stable working condition of the dam and does not rule out the possibility of dam failure.

Longtan Hydropower Station is located in Gengda Town, Wolong Special Zone, Wenchuan, Sichuan Province. It is the fourth power station on the main stream of Yuzixi, a first-class tributary of Minjiang River, and belongs to Shenhua Sichuan Energy Company.

The installed capacity of the power station is 24MW, and the dam is a concrete dam, with a crest elevation of 1 637.3 m, a dam height of 20,35 m, a normal storage level of 1 636 m and a total storage capacity of 379,600 cubic meters. It is a diversion power station with daily regulation function,1.996 June 1.2. The 5. 12 earthquake in 2008 caused serious damage to power station equipment and facilities. After four and a half years of post-disaster reconstruction, all three units were put into operation for the second time on 20 13 1.

On August 20, torrential rain caused flash floods and mudslides. Due to power failure, the gate could not be opened normally and the dam overflowed. If the danger is not eliminated in time, there is a danger of dam failure.

After on-site consultation with the hydropower station and local government departments, the working group suggested that monitoring and prevention, personnel transfer, communication and traffic recovery, dam downstream apron and highway protection, dam safety and stability evaluation should be carried out. According to the situation, take measures, such as opening or destroying the gate, or opening the temporary discharge chute on the left bank.