Flow and sediment transport in emerging vegetated zone

Sung Uk Choi, Hyeongsik Kang, Kyongmin Yeo

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Vegetation on the streambed increases the total resistance but decreases the bed shear stress. However, when the drag force term is not separated from the resistance term in the momentum equation, increasing the roughness coefficient due to vegetation may result in increasing the bed shear stress. This is not realistic and crucial to the accurate assessment of sediment transported in the vegetated zone. This paper presents a ID model for the simulation of flow and sediment transport in the emerging vegetated zone. The model consists of depth-averaged equations of continuity, momentum, turbulent kinetic energy, and its dissipation rate. The suspended load and bedload are estimated, and the bed elevation change is computed by solving the Exner's equation. The model is validated through comparisons with experimental observations. Then, the model is applied to predict the morphological change of the emerging vegetated zone in response to the flood. The developed model can be used to the management of vegetated islands within watercourse made naturally which are important to river restoration projects nowadays.

Original languageEnglish
Pages (from-to)87-96
Number of pages10
JournalEcology and Civil Engineering
Volume6
Issue number1
DOIs
Publication statusPublished - 2003 Jan 1

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Sediment transport
sediment transport
bottom stress
shear stress
Shear stress
momentum
Momentum
suspended load
vegetation
bedload
Kinetic energy
kinetic energy
Restoration
drag
roughness
Drag
dissipation
Sediments
Surface roughness
Rivers

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Ecology

Cite this

Choi, Sung Uk ; Kang, Hyeongsik ; Yeo, Kyongmin. / Flow and sediment transport in emerging vegetated zone. In: Ecology and Civil Engineering. 2003 ; Vol. 6, No. 1. pp. 87-96.
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Flow and sediment transport in emerging vegetated zone. / Choi, Sung Uk; Kang, Hyeongsik; Yeo, Kyongmin.

In: Ecology and Civil Engineering, Vol. 6, No. 1, 01.01.2003, p. 87-96.

Research output: Contribution to journalArticle

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