Title
Temporarily Installed Long, Steep Denil Fishway on the Ohkohchi-Sabo Dam in the Abe-Gawa River
Publication Date
1995
Publication Title
Proceedings of the International Symposium on Fishways '95
Start Page
155
End Page
162
Publication Place
Gifu, Japan
Publisher
The Organizing Committee for International Symposium on Fishways '95 in Gifu
Abstract
This paper presents a summary of the Ohkohchi Temporary Denil Fishway Project. In this project, a small, but long and steep Denil fishway has been installed on a temporary spillway channel at the Ohkohchi sabo-dam. After the failure in the initial design of twin-line fishway with shallow resting pools, trials of various devices to improve the fishway and evaluation study have been carried out since 1993. The major improvement includes changing to a zigzag single-line system resulting in a change of flow direction in each pool and the addition and modification of resting pools. After these changes, successful ascent of the fishway by some fishes was confirmed.