Three Gorges Dam deformed but safe, say operators
Comment of the Day

July 27 2020

Commentary by Eoin Treacy

Three Gorges Dam deformed but safe, say operators

This article by Frank Chen for may be of interest to subscribers. Here is a section:

The deformation occurred last Saturday when the flood from western provinces including Sichuan and Chongqing along the upper reaches of the Yangtze River peaked at a record-setting 61,000 cubic meters per second, according to China Three Gorges Corporation, a state-owned enterprise that manages the dam and the sprawling power plant underneath it.

The company noted that parts of the dam had “deformed slightly,” displacing some external structures, and seepage into the main outlet walls had also been reported throughout the 18 hours on Saturday and Sunday when water was discharged though its outlets.

But the problem of water seeping out did not last long, as the dam reportedly deployed floodgates to hold as much water as possible in its 39.3 billion-cubic-meter reservoir to shield the cities downstream from the biggest Yangtze deluge so far this year.


Meanwhile, Wang Hao, a member of the Chinese Academy of Engineering and an authority on hydraulics who sits on the Ministry of Water Resources’ Yangtze River Administration Commission, has also assured that the dam is sound enough to withstand the impact from floods twice the mass flow rate recorded on Saturday.

Eoin Treacy's view

It is still raining in southwest China and that means the dam will be letting out more water to control the level behind the wall. Therefore, it is unlikely to be able to curtail the risk of flooding downriver.

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