What are the reasons why two reservoirs in Inner Mongolia burst their banks?

On July 18, continuous rainstorm occurred in Molidawa Daur Autonomous Banner of Hulunbeier City, Inner Mongolia, which caused the dams of Yong 'an Reservoir and Xinfa Reservoir to burst. The national highway G11in Moqi was washed away by the flood, the road was interrupted, and the villages and fields became a Wang Yang. Moqi G11National Highway was washed away by the flood and the road was interrupted.

In view of the above situation, on July 19, a staff member of the People's Government of Molidawa Daur Autonomous Banner issued a statement saying that the dam-break accidents of Xinfa Reservoir and Yong 'an Reservoir occurred on the afternoon of July 18, which was caused by heavy rain. After the incident, the relevant person in charge has arrived at the scene to participate in the rescue. At present, the losses caused by dam break are still unknown.

On the same day, the relevant person in charge of Moqi Water Conservancy Engineering Technical Service Center said that at present, all the personnel of the four downstream villagers' groups have been evacuated, and the flood has merged into the mainstream last night. According to its introduction, Yong 'an Reservoir is located in the upper reaches of Xinfa Reservoir, with a linear distance of13km. The normal storage capacity of Yong 'an Reservoir is 8 million cubic meters. The dam break caused the damage of the connecting section of the dam body, which led to the breach. After the water flowed into Xinfa Reservoir, Xinfa Reservoir was seriously damaged.

Cause analysis of sudden rainstorm in inner Mongolia;

In fact, the main reason for the sudden rainstorm in Inner Mongolia is the influence of "cold vortex thunderstorm". From 8: 00 am on July 1 day, a large cold vortex has formed in the western part of Mongolia, and this cold vortex began to move slowly to the border areas of central and eastern Inner Mongolia. As the cold vortex approaches, it slowly releases cold air at high altitude in northern China.

In this way, if you encounter this cold and hot water vapor, it is easy to form a rainstorm. This cold vortex not only affected Inner Mongolia, such as Yixian, Hebei Province, but also was the biggest flood since 1963.