The sedimentation problem should not be overlooked. It's not just sediments but also big rocks that are transported by the river. They could block the dam and damage the turbines. If sediments fill up the dam the cost of dredging will be important.
If sediment cannot flo freely along the river, the waters will cause erosion in lieu of fertilizing the plains.
Finally, the ecological issue is serious. There is so much pollution flowing down the Yangtze that the lake created by the dam will quickly become a cesspit devoid of life. How are the Chinese planning to clean up the industrial waste in the new lake ?
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