PLUNGING AND STREAMING FLOWS IN POOL-AND-WEIR FISHWAYS

• ONITSUKA Kouki

  九州工業大学工学部建設社会工学科

• AKIYAMA Juichiro

  九州工業大学工学部建設社会工学科

• KIUCHI Daisuke

  九州工業大学大学院工学研究科博士前期課程

• KAWARA Noriaki

  九州工業大学工学部建設社会工学科

Bibliographic Information

Other Title

• 階段式魚道におけるプランジングフローとストリーミングフローの発生条件に関する研究

Abstract

Fishways are river constructions which give a helping to fish migration. The rea re three types of flow formations in pool-and-weir fishways such as a plunging flow, streaming flow and intermixed flow of plunging and streaming flows. Rajaratnam et al. proposed a criterion formula that predicts the flow formations. However, this criterion formula has no physical meaning. Further the accuracy of prediction of their for mula is not high. In this study, the criterion formula, which can predict the flow formation in a pool-and-weir fishway, is derived semi-theoretically. The experiments were conducted with changing the aspect ratio and discharge in the pool-and-weir fishway. The water surface profiles were measured and also three components velocities were measured with a 3-D electromagnetic current meter. A new criterion formula, which is able to predict the flow formation, is proposed under the condition that the channel slope is 1 on 12.

Journal

• PROCEEDINGS OF HYDRAULIC ENGINEERING

  PROCEEDINGS OF HYDRAULIC ENGINEERING 49 817-822, 2005

  Japan Society of Civil Engineers

Keywords

• pool-and-weir fishway
• plunging flow
• streaming flow
• migration

Details

• CRID: 1390282680146460800
• NII Article ID: 130003842228
• DOI: 10.2208/prohe.49.817
• ISSN: 18849172
• ISSN: 09167374
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed