EFFECTS OF DEPTH OF POOL IN POOL-AND-WEIR FISHWAY ON MIGRATION CHARACTERISTICS OF AYU
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- ONITSUKA Kouki
- 九州工業大学大学院 建設社会工学研究系
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- AKIYAMA Juichiro
- 九州工業大学大学院 建設社会工学研究系
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- MATSUDA Koichiro
- 東洋建設株式会社大阪本店
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- KURAMOTO Saori
- 九州工業大学大学院 工学府建設社会工学専攻
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- NOGUCHI Shohei
- 九州工業大学大学院 工学府建設社会工学専攻
Bibliographic Information
- Other Title
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- 階段式魚道におけるプール水深がアユの遡上特性に及ぼす影響
Abstract
Fishways have been constructed to facilitate migration of fish past dams, waterfalls and rapids. Wada pointed out that the migration rate of ayu (Plecoglossus altivelis altivelis) was high value when the depth of the pool in a pool-and-weir fishway was shallow. However, in this study, the discharge is fixed. Therefore the influence of the discharge change is not taken into consideration. And the cause of the migration is ambiguous.<br> In this study, the depth of the pool in a pool-and-weir fishway was changed 0.2, 0.4, 0.6, and 0.8m, and the discharge in each depth was changed 3, 5, 7, 9, and 11 l/s. The migration rates of ayu (Plecoglossus altivelis altivelis) were obtained with the aid of two sets of digital video cameras. It was found that the migration rates of ayu take the maximum value when the depth in a pool-and-weir fishway is in the range of 0.2-0.4 m. However the migration rate is low when discharge is a few, or large. And it was found that the migration rates of ayu is high when the fish's angle has gathered.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)
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Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 68 (6), II_25-II_31, 2012
Japan Society of Civil Engineers
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Details 詳細情報について
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- CRID
- 1390001205355716992
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- NII Article ID
- 130004560324
- 120005647838
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- ISSN
- 21856648
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- HANDLE
- 10228/5481
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- Text Lang
- ja
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- Data Source
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- JaLC
- IRDB
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed