Flow resistance and suspended load in sand-bed rivers: Simplified stratification model

Scott Wright, Gary Parker

Research output: Contribution to journalArticlepeer-review

Abstract

New methods are presented for the prediction of the flow depth, grain-size specific near-bed concentration, and bed-material suspended sediment transport rate in sand-bed rivers. The salient improvements delineated here all relate to the need to modify existing formulations in order to encompass the full range of sand-bed rivers, and in particular large, low-slope sand-bed rivers. They can be summarized as follows: (1) the inclusion of density stratification effects in a simplified manner, which have been shown in the companion paper to be particularly relevant for large, low-slope, sand-bed rivers; (2) a new predictor for near-bed entrainment rate into suspension which extends a previous relation to the range of large, low-slope sand-bed rivers; and (3) a new predictor for form drag which again extends a previous relation to include large, low-slope sand-bed rivers. Finally, every attempt has been made to cast the relations in the simplest form possible, including the development of software, so that practicing engineers may easily use the methods.

Original languageEnglish (US)
Pages (from-to)796-805
Number of pages10
JournalJournal of Hydraulic Engineering
Volume130
Issue number8
DOIs
StatePublished - Aug 1 2004
Externally publishedYes

Keywords

  • Density stratification
  • Flow resistance
  • Hydraulic models
  • River beds
  • Sand
  • Sediment concentration

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology
  • Mechanical Engineering

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