Modelling of the apparent shear stress for predicting zonal discharge in rough and smooth asymmetric compound open channels

P. Singh, X. Tang*, H. R. Rahimi

*Corresponding author for this work

Research output: Chapter in Book or Report/Conference proceedingConference Proceedingpeer-review

2 Citations (Scopus)

Abstract

Transverse exchange of momentum between the main channel and floodplain in a uniform asymmetric compound channel flow is taken into account for the prediction of zonal and overall discharge. The overall dynamic effect has been tried to incorporate in the discharge calculations in such a way that lowering the discharge capacity of the compound channel can be evaluated through the separate section of the compound channels. In this study, the proposed model can predict the zonal and overall discharge reasonably well for wide combinations of geometric and roughness variations in the datasets of asymmetric channels considered. Out of different models for interactive divided channel methods, this new apparent shear based model is found to outperform others and found to give least overall percentage error of 6.7.

Original languageEnglish
Title of host publicationRiver Flow 2020 - Proceedings of the 10th Conference on Fluvial Hydraulics
EditorsWim Uijttewaal, Mario J. Franca, Daniel Valero, Victor Chavarrias, Claudia Ylla Arbos, Ralph Schielen, Ralph Schielen, Alessandra Crosato
PublisherCRC Press/Balkema
Pages84-94
Number of pages11
ISBN (Electronic)9780367627737
Publication statusPublished - 2020
Event10th Conference on Fluvial Hydraulics, River Flow 2020 - Virtual, Online, Netherlands
Duration: 7 Jul 202010 Jul 2020

Publication series

NameRiver Flow 2020 - Proceedings of the 10th Conference on Fluvial Hydraulics

Conference

Conference10th Conference on Fluvial Hydraulics, River Flow 2020
Country/TerritoryNetherlands
CityVirtual, Online
Period7/07/2010/07/20

Keywords

  • Apparent shear
  • Asymmetric compound channels
  • Zonal & overall discharge

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