Who knows the course and details of the Zhouqu catastrophic flood in Gansu?

On August 7, at 10, there was heavy rainfall in the local area, and the county town was hit by mudslides around 12. Debris flow rushed into the county seat, cut off the river and formed a dammed lake. It is estimated that 50,000 people are affected. Zhouqu County is located in the canyon, with a total population of more than 40,000 and a surrounding population of about 50,000. By the end of 16, there were 490 dead, 490 missing, 66 hospitalized, outpatient 159 1 person, and rescue 1243 people. Zhouqu officially issued a notice to urgently launch the "Emergency Disaster Prevention Plan for Geological Disasters in Zhouqu County and Surrounding Areas". According to the weather forecast, there will be showers or thunderstorms in Gannan, Zhouqu and Bailong River basins on the night of 16. From June 7 to 20, 65438, there were two obvious precipitation weather processes, with the cumulative total rainfall of 40-60mm and the local rainfall of 70-100 mm. The news center of Zhouqu Extra-large Debris Flow Disaster Rescue and Relief Headquarters said that Gansu Provincial Department of Land and Resources and Gansu Provincial Meteorological Bureau jointly issued a 4-level geological disaster warning, and Zhouqu County is likely to have geological disasters. The Zhouqu county government immediately launched the emergency disaster prevention plan for geological disasters in Zhouqu county and surrounding areas proposed by the working group in front of the land and resources system to prevent disasters from happening again. The emergency rescue and disaster relief headquarters has issued a notice, requiring all emergency rescue and disaster relief teams to do a good job in disaster prevention and avoidance and their own safety protection. In case of heavy rainfall, all disaster relief personnel and people should be immediately evacuated from the debris flow accumulation area and evacuated to safety as planned. According to the plan, we must resolutely evacuate and avoid risks, and implement specific measures for detection and early warning; Land departments should intensify the investigation of hidden dangers and prohibit the construction of tents and temporary buildings in areas prone to geological disasters such as landslides and mudslides. What has been built should be demolished immediately. The reporter learned from the Zhouqu county government on June 16 that the Zhouqu county government and the "August 8" flood fighting and rescue headquarters of Zhouqu county jointly issued a notice to urgently requisition land damaged by floods and mudslides such as Sanyanyugou and Luojiayugou according to law for the construction of flood control engineering facilities. All touching events are insignificant in the face of tragic facts.