EFFECTS OF LAYOUT METHOD OF PROTRUSIONS IN FISH LADDER FOR <i>ANGUILLA JAPONICA</i> ON MIGRATION RATE

• ONITSUKA Kouki

  九州工業大学大学院 建設社会工学研究系

• IZUMI Kousuke

  株式会社大気社 環境システム事業部

• SAKO Tomoya

  九州工業大学大学院 工学府建設社会工学専攻

• MIYAGAWA Tomoyuki

  九州工業大学大学院 工学府工学専攻

• MINESHITA Souya

  千葉県庁 企業局千葉水道事務所千葉西支所

• MOTOMATSU Nanami

  日本工営株式会社 国内事業本部流域水管理事業部

Bibliographic Information

Other Title

• ウナギ用魚道内の突起物の配置がウナギの遡上特性に及ぼす影響

Abstract

 It is estimated that the number of eels (Anguilla japonica) is decreased by the worse of river condition, thus fish ladder for eels is necessary in the river. Grid and zigzag type are known as how to put bunch of brushes and round protrusions on European fish ladder for eels. However, it is not cleared that which type is better and it is guessed that there is no studies about it. This study was made to evaluate effects on migration rate of eels under the condition that how to put on protrusions and discharge in fish ladder are changed. It was found that migration rate of eels and averaged migrating speed of eels keep advancing in zigzag type than grid type in this experimental range. Therefore, it is assumed that migration rate of eels improves in zigzag type.

Journal

• Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)

  Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 75 (2), I_547-I_552, 2019

  Japan Society of Civil Engineers

Keywords

• Anguilla japonica
• fish ladder for eels
• protrusion
• installation location
• migration rate

Details

• CRID: 1390567901495078528
• NII Article ID: 130007940246
• DOI: 10.2208/jscejhe.75.2_i_547
• ISSN: 2185467X
• Web Site: https://www.jstage.jst.go.jp/article/jscejhe/75/2/75_I_547/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed