IAHR Document Library

« Back to Library Homepage « Proceedings of the 12th International Symposium on Ecohydrau...

Effects of Diameter of Protrusions and Discharge per Unit Width in Fish Ladder for Eels on Migration Rate of Anguilla Japonica

Author(s): Kouki Onitsuka; Juichiro Akiyama; Kousuke Izumi

Linked Author(s):

Keywords: No Keywords

Abstract: Studies on biology and environment of eels (Anguilla japonica) have been advanced in recent years. However, little is known about fish ladder for eels and migrating characteristics of eels. Especially, special fishways are necessary for demersal fish like young eels. This study was made to evaluate effects on migration rates of eels under the condition that diameter of protrusions and discharge per unit width in fish ladder are changed. It was found that migration rates increase with the increase of discharge per unit width in each diameter of protrusions. Besides, the sinuosity of eels is increasing, and the averaged migrating speed is decreasing with the increase of discharge per unit width and diameter of protrusions.


Year: 2018

Copyright © 2024 International Association for Hydro-Environment Engineering and Research. All rights reserved. | Terms and Conditions