EFFECTS OF NOTCH RATIO ON MIGRATION RATE IN POOL-AND-WEIR FISHWAYS
Most of fishways constructed beside of weirs and dams in Japanese rivers belong to pool-and-weir type. Usually, a notch is placed at the weir. Ministry of Land, Infrastructure and Transport recommends that the ratio between the notch width and fishway one set in the range between 0.17 and 0.20 without any verification. In this study, the notch ratio in pool-and-weir fishway was changed in the range between 0.1 and 0.7 and migration rates of the ayu, Plecoglossus altivelis altivelis, were obtained with the aid of two sets of digital video cameras. Further, three components velocities were measured with a 3-D electromagnetic current meter.
pool-and-weir fishway notch ratio discharge orientation migration
Kouki Onitsuka Juichiro Akiyama Yusuke Mori Yohei Iiguni Tatsuya Kobayashi
Kyushu Institute of Technology, Kita-Kyushu, Japan Hitachi, Ltd., Hitachi, Japan Taikisha Ltd., Tokyo, Japan
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
2247-2252
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）