Unsteady flow simulation of alternative bars in a semi-circle bend

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Non-uniform sediment transport through a semi-circle channel was simulated with a depthaveraged two-dimensional hydrodynamic and sediment transport model. The hydrodynamic model is based on the solution of depth-averaged flow continuity and momentum equations with dispersion terms to take the effect of secondary flow into account. The sediment transport model treats bed load and bed material as multiple grainsized sediment mixtures. Changes in bed elevation are calculated by solving the sediment mass conservation equation. Laboratory experiments on sand bar formation and transverse sediment sorting during an unsteady flow event were selected to test the sediment transport model. The comparison of the simulated bar/pool bed configurations and the distribution of surface bed material with the measurements indicated the developed flow model capable of simulating bed topography and non-uniform sediment sorting under unsteady flow.

Original languageEnglish (US)
Title of host publicationRiver, Coastal and Estuarine Morphodynamics
Subtitle of host publicationRCEM 2005 - Proceedings of the 4th IAHR Symposium on River, Coastal and Estuarine Morphodynamics
Pages753-759
Number of pages7
StatePublished - Dec 1 2006
Event4th IAHR Symposium on River, Coastal and Estuarine Morphodynamics, RCEM 2005 - Urbana, IL, United States
Duration: Oct 4 2005Oct 7 2005

Publication series

NameRiver, Coastal and Estuarine Morphodynamics: RCEM 2005 - Proceedings of the 4th IAHR Symposium on River, Coastal and Estuarine Morphodynamics
Volume2

Other

Other4th IAHR Symposium on River, Coastal and Estuarine Morphodynamics, RCEM 2005
CountryUnited States
CityUrbana, IL
Period10/4/0510/7/05

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ASJC Scopus subject areas

  • Ecological Modeling
  • Environmental Chemistry

Cite this

Duan, J. G. (2006). Unsteady flow simulation of alternative bars in a semi-circle bend. In River, Coastal and Estuarine Morphodynamics: RCEM 2005 - Proceedings of the 4th IAHR Symposium on River, Coastal and Estuarine Morphodynamics (pp. 753-759). (River, Coastal and Estuarine Morphodynamics: RCEM 2005 - Proceedings of the 4th IAHR Symposium on River, Coastal and Estuarine Morphodynamics; Vol. 2).