The Dam has a limited ability to control flood; in middle and lower Yangtze River valley, it will hinder the rare and valuable water animals and fishes from swimming from the middle and lower river to the upper riv-r for reproduction.

• 水坝控制中、下游洪涝灾害的能力是有一定限度的,会阻碍某些生活在中、下游的珍稀水兽和其它鱼类游到上游繁殖。