The applications of the enhanced CCHE2D model to study the alluvial channel migration processes

Guohong Duan, Sam S Y Wang, Jia Yafei

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

This paper is to report a newly developed numerical-empirical model, the Enhanced CCHE2D (EnCCHE2D), and its application to simulating the alluvial channel migration phenomena. EnCCHE2D model is capable of predicting quasi-three-dimensional (3D) flow field and shear stress distribution on the bed, because a set of empirical functions of 3D flow characteristics formulated by results of a 3D model, CCHE3D, was integrated with CCHE2D, a depth-averaged hydrodynamic model, the predecessor of EnCCHE2D. The processes of sediment transport and meander migration were predicted based on these quasi-3D flow solutions. The advance or retreat of bank is calculated by considering not only the hydraulic erosion of bank surface and toe, but also the mass balance of sediment flux in the near-bank zone. As a result, the simulation of bank erosion, bar/pool formation and shifting, bank advance and retreat, channel widening and migration and meander evolution phenomena agree well with the available measurements of physical experiments.

Original languageEnglish (US)
Pages (from-to)469-479
Number of pages11
JournalJournal of Hydraulic Research
Volume39
Issue number5
StatePublished - 2001
Externally publishedYes

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Erosion
meander
Sediment transport
bank erosion
three-dimensional flow
Stress concentration
Shear stress
Numerical models
Flow fields
Sediments
Hydrodynamics
Hydraulics
flow field
Fluxes
shear stress
sediment transport
mass balance
hydrodynamics
hydraulics
erosion

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology

Cite this

The applications of the enhanced CCHE2D model to study the alluvial channel migration processes. / Duan, Guohong; Wang, Sam S Y; Yafei, Jia.

In: Journal of Hydraulic Research, Vol. 39, No. 5, 2001, p. 469-479.

Research output: Contribution to journalArticle

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