LINEAR STABILITY ANALYSIS OF CHANNEL INCEPTION

• IZUMI Norihiro

  JAPAN SOCIETY OF CIVIL ENGINEERS

Bibliographic Information

Other Title

• 水路群発生の線形安定論
• 水路群発生の線形安定論--斜面下流端からの発生理論
• スイロ グンハッセイ ノ センケイ アンテイロン シャメン カリュウ タン カラ ノ ハッセイ リロン
• DOWNSTREAM-DRIVEN THEORY
• 斜面下流端からの発生理論

Abstract

A linear stability analysis of downstream-driven channel inception is performed in this study. The analysis shows that, in the case of mild slope where flow is subcritical, perturbations grow only if the wavelength is on the order of 6-100 times as large as the critical depth devided by the friction coefficient (D_c/C_f) and that the characteristic wavelength which maximizes the growth rate of perturbation scales 10 times D_c/C_f. Evaluating the friction coefficient as on the order of 0.01, an estimate of incipient channel spacing on the order of 1000 times the Froude-critical depth is obtained. It is also found that the possibility of channel inception decreases as surface slope or the critical bed shear stress relatively increases.

Journal

• Doboku Gakkai Ronbunshu

  Doboku Gakkai Ronbunshu 1999 (614), 65-75, 1999-02-21

  Japan Society of Civil Engineers

Keywords

• channel inception
• linear stability analysis
• perturbation technique
• spacing

Details

• CRID: 1390001205309413248
• NII Article ID: 10002527511
• NII Article ID: 10015437550
• NII Book ID: AN10014020
• DOI: 10.2208/jscej.1999.614_65
• ISSN: 18827187
• ISSN: 02897806
• ISSN: http://id.crossref.org/issn/02897806
• NDL BIB ID: 4668643
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4668643
• Web Site: https://www.jstage.jst.go.jp/article/jscej1984/1999/614/1999_614_65/_pdf
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed