Why did the Three Gorges Dam only reach 185 meters? Can increasing the height of 10 meter completely solve the flood problem of the Yangtze River?

The Three Gorges Dam is only built to185m. At that time, the Three Gorges Dam is now "long" 10 meter, which is equivalent to a high dam project. Now, the Three Gorges Dam is designed according to the original middle dam scheme. The dam foundation, dam width and dam height are preliminarily designed according to a certain proportion, and the compressive strength is high. It is based on the safety of the Three Gorges Dam, through scientific calculation and various construction considerations. The total height of the Three Gorges Dam is185m, and the maximum safety height of interception is175m ...1m. Every interception can collect 500 million cubic meters of water.

If the Three Gorges Project is to be "long" 10 m, that is to say, the normal water level 185 m, which is equivalent to an increase of more than 5 billion cubic meters of water storage, this is a test for the bearing capacity of reservoir foundation and dam. In the original dam type scheme, the flood must exceed the design standard water level180.4m.. At present, the normal water level of the "Dragon" dam is 185 m, which is 4.6 m higher than the original design flood level 180.4 m, which is equivalent to adding 2 billion cubic meters of water pressure to the Three Gorges Dam, although the dam may be able to withstand this pressure in a short time. However, in the event of a disaster, such as an earthquake, the dam may not be able to withstand such a large impact force, leading to the possibility of "dam break".

Even if dam break does not occur, the Three Gorges Dam will be "raised" 10 meter. If the dam reaches the high dam plan, the reservoir area will face secondary migration and the city and historical sites will be destroyed. Coupled with a "time bomb" on the top of the Three Gorges Dam, residents in the middle and lower reaches of the Yangtze River feel "depressed" all the time and may explode at any time, making people live in a "tense" predicament all day and people are on the verge of mental breakdown. No one wants to do this and suffer this kind of torture.

To sum up, the scheme of Three Gorges Dam and Middle Dam is the most realistic, while the scheme of heightening10m is wishful thinking and unrealistic. Similarly, Danjiangkou Reservoir, a tributary of the Yangtze River, has also been raised by more than ten meters to make way for the Middle Route Project of South-to-North Water Transfer. This is a successful case, but it is different from the Three Gorges Dam. Instead of putting a hat on the dam, it is more practical to build a new dam in another place, killing two birds with one stone.