MEANDERING CHANNELS RESPONSE TO A SERIES OF PERMEABLE AND IMPERMEABLE STRUCTURES UNDER DIFFERENT SINUOSITY

• KARKI Saroj

  Dept. of Civil and Earth Resources Engineering, Kyoto University

• NAKAGAWA Hajime

  Disaster Prevention Research Institute, Kyoto University

• KAWAIKE Kenji

  Disaster Prevention Research Institute, Kyoto University

抄録

 Bank erosion is a challenging issue in the management of meandering rivers. For the effective functioning of the implemented bank protection measures, it is first necessary to understand the channel response to these structures. Moreover, channel behavior is made further complex due to the varying channel geometric properties like sinuosity, deflection angle, curvature, etc. In this regard, the focus of the current study through 2D numerical simulation is to analyze the channel flow and morphological response to the permeable and impermeable bank protection structures. Higher sinuosity channel showed a better response to both types of structures in terms of the reduced scour at groynes tip, greater deflection of high-velocity currents towards the channel. Although permeable type groynes showed lesser bed evolution, it induced higher near-bank velocity increasing the risk of bank erosion. Analysis with suitable modifications to the arrangement of groynes might be needed for further understanding of the mechanism.

収録刊行物

• 土木学会論文集Ｂ１（水工学）

  土木学会論文集Ｂ１（水工学） 75 (2), I_1021-I_1026, 2019

  公益社団法人 土木学会

キーワード

• meandering channel
• sinuosity
• morphology
• permeable groynes
• impermeable groynes

詳細情報

• CRID: 1390004951541546496
• NII論文ID: 130007940056
• DOI: 10.2208/jscejhe.75.2_i_1021
• ISSN: 2185467X
• Web Site: https://www.jstage.jst.go.jp/article/jscejhe/75/2/75_I_1021/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可