Journal of the Korean Society of Environmental Restoration Technology (한국환경복원기술학회지)

The Korea Society of Environmental Restoration Technology (한국환경복원기술학회)
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Hydraulic and Upstream Migratory Experiments on Combined Fishway of Herring-bone Bottom Baffle Type and Brush Type

헤링본 조류판·브러시 겸용어도의 수리 및 어류 소상실험

  • Lee, Hyeong Rae (Department of Civil Engineering, Gyeongnam National University of Science and Technology) ;
  • Kim, Ki Heung (Department of Civil Engineering, Gyeongnam National University of Science and Technology)
  • 이형래 (경남과학기술대학교 토목공학과) ;
  • 김기흥 (경남과학기술대학교 토목공학과)
  • Received : 2011.05.17
  • Accepted : 2011.06.24
  • Published : 2011.06.30
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Abstract

In order to promote efficiency of upstream and downstream migration of fishes, this study has developed a combined fishway of herring-bone bottom baffle type and brush type fishways. The results obtained are as follows : 1. In a channel with constant incline, the velocity of current generally shows a distinct tendency of acceleration as it goes down the stream. But in the hydraulic experiment of herring-bone bottom baffle type fishway, the velocity reached its maximum only at 0.4m/sec, and it tended to be stable without any acceleration. 2. The velocity in the brush type fishway showed a distinct tendency of acceleration as the discharge increased. But its greatest velocity was only 0.3m/sec, and its velocity change according to the discharge increase was only 0.15m/sec at maximum. 3. The maximum velocity in the combined type fishway was less than half of the blast speed of the poorest swimmer, the juvenile eel with 90mm of body length. So any species of fishes are supposed to be able to migrate upstream from the estuary through this combined type fishway. 4. The field experiment of upstream migration showed that the combined type fishway can promote efficiency of upstream and downstream migration of any species of fishes.

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References

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