Numerical prediction of morphological change of straight trapezoidal open-channel

Sung Uk Choi, Younghoon Joung

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


This paper presents a numerical model that is capable of simulating the morphological process of the trapezoidal open-channel. The fact that particles on the sloped side bank do not move in the same direction as the flow adds the difficulty in modeling. The lateral distribution model, which distributes the unit discharge over the width, is used for the flow analysis. Vectorial bedload formula by . Kovacs and Parker (1994) is used and channel topography is calculated by solving Exner's equation with the help of sliding algorithm proposed by . Menendez et al. (2008). Values of roughness coefficient and lateral eddy viscosity are calibrated using laboratory data sets. Finally, the proposed model is applied to laboratory experiments of . Ikeda (1981) and . Izumi et al. (1991). Time evolutions of channel cross section and dimensionless shear stress are provided and discussed.

Original languageEnglish
Pages (from-to)111-118
Number of pages8
JournalJournal of Hydro-Environment Research
Issue number2
Publication statusPublished - 2012 May

Bibliographical note

Funding Information:
This work was supported by a grant (Code # ’11 CTIP C-04 ) from the Construction Technology Innovation Program (CTIP) funded by from the Ministry of Land, Transport and Maritime Affairs of Korean government .

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Civil and Structural Engineering
  • Environmental Chemistry
  • Water Science and Technology
  • Management, Monitoring, Policy and Law


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