Author(s): Hideyuki Miyafuji; Youichi Yasuda
Linked Author(s): Youichi Yasuda
Keywords: Bypass Fishway; Flood Control; Dam; Migration; Diadromous fish
Abstract: For the construction of a large dam in a mountain-river, it is critical for migrating diadromous fish that stream flow be maintained in order that they not become trapped in the dam-lake. It is necessary to provide the fish a migration route through the bypass fishway. Further, as the outlet of a water power station is located near the end of fishway, it is necessary for swimming fishes to have no restrictions in migrating upstream through the fishway. In this paper, a new intake system has been proposed in order that diadromous fish can migrate downstream through the fishway during a small snow melting flood. At the outlet of water power station, the installation of screen plate as a leading system has been proposed. These proposals have been confirmed as being effective for the migration of diadromous fish by the experiments in both the laboratory and field model.
Year: 2009