Incipient sediment motion on non-horizontal slopes: Début d’entraînement de sédiments sur des lits non horizontaux

Yee Meng Chiew, Gary Parker

Research output: Contribution to journalArticlepeer-review

Abstract

The study investigates the threshold condition for the initiation of cohesionless sediment transport on a nonhorizontal streamwise slope. Theoretical study of the stability of a sediment particle lying on a non-horizontal bed slope shows that the critical shear stress is a function of the streamwise bed slope. Experiments conducted with a closed-conduit flow show that the equation derived from force analysis adequately evaluates the critical shear stress of sediments lying on slopes ranging from steep positive to negative (adverse). Tests conducted with a closed-conduit flow avoid the problems associated with those conducted with an open channel flow. In the latter flow condition, uniform flow is often difficult to achieve in a steep channel, and impossible to achieve when the streamwise bed slope is adverse.

Original languageEnglish (US)
Pages (from-to)649-660
Number of pages12
JournalJournal of Hydraulic Research
Volume32
Issue number5
DOIs
StatePublished - Sep 1994
Externally publishedYes

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology

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