MORPHOLOGICAL VARIATIONS WITH SINUOSITY IN SINE-GENERATED MEANDERING CHANNELS WITH AND WITHOUT GROYNES

• 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

• HASHIMOTO Masakazu

  IRIDeS, Tohoku University

• HASEGAWA Yuji

  Graduate School of Integrated Arts and Sciences, Hiroshima University

抄録

 The present experimental study investigated the effect of channel sinuosity and curvature on the evolution of flow and morphology in sine-generated meandering channels. Experiments were conducted in meandering channels of two different sinuosities and curvature, composed of erodible bed and banks under the steady discharge, with and without groynes. Results showed that the channel with low sinuosity and a low ratio of the radius of curvature to the channel width (R/B) is more prone to erosion and morphological changes compared to the channel of higher sinuosity and R/B ratio. Channel sinuosity also influenced the overall morphological evolution with LS channel showing more distinct characteristics of a meander, forming point bar, pool and riffle sequences. Variation in the flow pattern with sinuosity was observed which ultimately determined the zones of maximum erosion-deposition in the channel. Although the groynes minimized the bank erosion, they also tend to shift the erosion from one point to another.

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） 74 (5), I_967-I_972, 2018

  公益社団法人 土木学会

キーワード

• sine-generated curve
• meandering channel
• sinuosity
• bank erosion
• groynes

詳細情報

• CRID: 1390002184848385536
• NII論文ID: 130007757918
• DOI: 10.2208/jscejhe.74.5_i_967
• ISSN: 2185467X
• Web Site: https://www.jstage.jst.go.jp/article/jscejhe/74/5/74_I_967/_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