Title

Experimental Study on a Steep Pool-and-Weir fishway using Ayu

Authors

Y Hara
Y Wada

Publication Date

1995

Notes

Title, abstract, and figure legends in English, remainder of text in Japanese

Publication Title

Proceedings of the International Symposium on Fishways '95

Start Page

169

End Page

173

Publication Place

Gifu, Japan

Publisher

The Organizing Committee for International Symposium on Fishways '95 in Gifu

Abstract

In Japan fishways are usually constructed more mild slope than 10%, because the targets of the fishways are almost always Ayu fish which is 10-20 cm long. However, the fishways in sabo dams sometimes need to be settled more steep slope than 10%. Therefore the authors tried to examine the possibility of a steep pool-and-weir fishway for sabo dams through fishway experiments using Ayu fish. The authors confirmed that the Denil type fishways are not suitable for Ayu fish in the field. As a result of the experiments, it is confirmed that Ayu ascends the pool-and-weir fishways of 20-30% gradient in limited water levels (less than 10cm high on each weir).



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