Modelling of sediment transport and bed deformation in rivers with continuous bends

Hefang Jing; Chunguang  Li; Yakun Guo; Lixiang Zhang; Lijun Zhu; Yitian Li

doi:10.1016/j.jhydrol.2013.07.005

Modelling of sediment transport and bed deformation in rivers with continuous bends

Hefang Jing, Chunguang Li, Yakun Guo, Lixiang Zhang, Lijun Zhu, Yitian Li

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Abstract

A two dimensional (2D) RNG k–e sediment model including the effects of secondary currents is developed
to simulate the sediment transport and bed deformation in rivers with continuous bends. Non-uniform
suspended and bedload sediment transports and the variation of effective bed material size distribution
are included in the model. A semi-coupled scheme for sediment model is proposed, which can be used for
simulating both the long- and short term sediment transport whenever riverbed changes. The model is
applied to simulate the flow and sediment transport in the upper reach of the Yellow River which is a
typical natural river reach with continuous bends. The river bed deformations caused by suspended
and bedload sediments are investigated. Good agreement between the numerically simulated results
and the field measurements is obtained, indicating that the model is capable of simulating the sediment
transport and predicting the bed deformation of rivers having continuous bends with reasonable
accuracy.

Original language	English
Pages (from-to)	224-235
Number of pages	12
Journal	Journal of Hydrology
Volume	499
Early online date	15 Jul 2013
DOIs	https://doi.org/10.1016/j.jhydrol.2013.07.005
Publication status	Published - 30 Aug 2013

Keywords

RNG k–ε turbulence model
bed deformation
suspended sediment
bedload sediment
bed material granularity

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10.1016/j.jhydrol.2013.07.005

E:\China collaboration\Hefang\J Hydrology\HYDROL14331R1(4)
NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Hydrology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in JOURNAL OF HYDROLOGY, VOL 499, (2013) DOI: 10.1016/j.jhydrol.2013.07.005
Accepted author manuscript, 1.73 MB

Cite this

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title = "Modelling of sediment transport and bed deformation in rivers with continuous bends",

abstract = "A two dimensional (2D) RNG k–e sediment model including the effects of secondary currents is developedto simulate the sediment transport and bed deformation in rivers with continuous bends. Non-uniformsuspended and bedload sediment transports and the variation of effective bed material size distributionare included in the model. A semi-coupled scheme for sediment model is proposed, which can be used forsimulating both the long- and short term sediment transport whenever riverbed changes. The model isapplied to simulate the flow and sediment transport in the upper reach of the Yellow River which is atypical natural river reach with continuous bends. The river bed deformations caused by suspendedand bedload sediments are investigated. Good agreement between the numerically simulated resultsand the field measurements is obtained, indicating that the model is capable of simulating the sedimenttransport and predicting the bed deformation of rivers having continuous bends with reasonableaccuracy.",

keywords = "RNG k–ε turbulence model, bed deformation, suspended sediment, bedload sediment, bed material granularity",

author = "Hefang Jing and Chunguang Li and Yakun Guo and Lixiang Zhang and Lijun Zhu and Yitian Li",

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T1 - Modelling of sediment transport and bed deformation in rivers with continuous bends

AU - Jing, Hefang

AU - Li, Chunguang

AU - Guo, Yakun

AU - Zhang, Lixiang

AU - Zhu, Lijun

AU - Li, Yitian

PY - 2013/8/30

Y1 - 2013/8/30

N2 - A two dimensional (2D) RNG k–e sediment model including the effects of secondary currents is developedto simulate the sediment transport and bed deformation in rivers with continuous bends. Non-uniformsuspended and bedload sediment transports and the variation of effective bed material size distributionare included in the model. A semi-coupled scheme for sediment model is proposed, which can be used forsimulating both the long- and short term sediment transport whenever riverbed changes. The model isapplied to simulate the flow and sediment transport in the upper reach of the Yellow River which is atypical natural river reach with continuous bends. The river bed deformations caused by suspendedand bedload sediments are investigated. Good agreement between the numerically simulated resultsand the field measurements is obtained, indicating that the model is capable of simulating the sedimenttransport and predicting the bed deformation of rivers having continuous bends with reasonableaccuracy.

AB - A two dimensional (2D) RNG k–e sediment model including the effects of secondary currents is developedto simulate the sediment transport and bed deformation in rivers with continuous bends. Non-uniformsuspended and bedload sediment transports and the variation of effective bed material size distributionare included in the model. A semi-coupled scheme for sediment model is proposed, which can be used forsimulating both the long- and short term sediment transport whenever riverbed changes. The model isapplied to simulate the flow and sediment transport in the upper reach of the Yellow River which is atypical natural river reach with continuous bends. The river bed deformations caused by suspendedand bedload sediments are investigated. Good agreement between the numerically simulated resultsand the field measurements is obtained, indicating that the model is capable of simulating the sedimenttransport and predicting the bed deformation of rivers having continuous bends with reasonableaccuracy.

KW - RNG k–ε turbulence model

KW - bed deformation

KW - suspended sediment

KW - bedload sediment

KW - bed material granularity

U2 - 10.1016/j.jhydrol.2013.07.005

DO - 10.1016/j.jhydrol.2013.07.005

M3 - Article

SN - 0022-1694

VL - 499

SP - 224

EP - 235

JO - Journal of Hydrology

JF - Journal of Hydrology

ER -

Modelling of sediment transport and bed deformation in rivers with continuous bends

Abstract

Keywords

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