Development of a New Fishway for Various Fish Species and Cost Reduction
ISSN | 00213551 |
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NII recode ID (NCID) | AA0068709X |
Recently, environmental conservation has been considered to be a more important part of the design of irrigation barrages than before. In this study, we investigated the spatial patterns of local flow velocity,etc. in a fishway with orifices (hereafter referred to as “orifice fishway”) to improve the performance for fish migration. The results showed that an orifice fishway enabled to achieve a more convenient maintenance through the use of a short baffle span and to obtain short migration routes for various fish species on a steeper slope of 1:4.5 and with a lower discharge of 0.12 m3/s compared with most of the currently used fishways by the improvement of “partially superimposed orifices”, even if the upstream or downstream water level changed.
Date of issued | |
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Creator | TSUNESUMI Naoto |
Subject |
headwork hydraulic design orifice |
Publisher | Japan International Research Center for Agricultural Sciences |
Available Online | |
NII resource type vocabulary | Journal Article |
Volume | 36 |
Issue | 4 |
spage | 201 |
epage | 209 |
DOI | 10.6090/jarq.36.201 |
Rights | Japan International Research Center for Agricultural Sciences |
Language | eng |