Influence of Dams on River Ecosystem and Its Countermeasures (Report‪)‬

1. Introduction Dam construction is an important engineering measure in dealing with the relationship between water and human being. In the traditional hydraulic engineering, a great deal of dams and dikes were built for the purpose of "harm exception and benefit enrichment" [1-2]. Meanwhile, large-scale river repair have also been done [3-5]. Dams have huge economic benefits and social benefits, such as preventing flood and reducing the disaster, adjusting the water quantity, irrigating and generating electricity [6-7]. However, in dam construction, some disadvantages may be caused to the river basin. With the development of the society, more and more scholars began to consider the effects of dam construction to the river ecosystem [8-10].