From 2018:
What would the effects be if the Three Gorges Dam were to collapse?
If the Three Gorges Dam is completely collapsed, more than 10 billion cubic meters of reservoir water will be released in a short time, and the coast between the dam site and Shashi City will be directly impacted by flood waves, resulting in serious disaster losses. The Gezhouba Dam water conservancy project will be severely damaged, and Yichang is flooded in the area below the railway line, and the embankment of Zhicheng, the upper and lower Dizhou and the Jing Jiang flood areas will be flooded by the embankment of the West Bank of the West.
The maximum flow rate of the dam break peak will reach 100 - 2 million 370 thousand cubic meters per second. The flood peak will reach the Gezhouba Dam water control hub at 100 km per hour. The flood peak will still reach 310 thousand cubic meters per second, the flood damages the Gezhouba Dam dam and enters the city of Yichang. The flow rate in the Yichang city is still still. With 65 kilometers per hour and 4 to 5 hours after dam break, the water level of Yichang will reach 64 to 71 meters above sea level.
It is not only the water, something else is in the water:
2020-07-12 08:10
The recent floods and floods in our province are frequent. In areas where schistosomiasis is endemic, the chances of contracting schistosomiasis will be greatly increased without strengthening self-protection. In order to prevent infection with schistosomiasis and protect your own health, it is necessary to understand schistosomiasis protection.
https://www.sohu.com/a/407129295_120207620