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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/11288

Title: Quasi two-dimensional model for straight overbank flows through emergent vegetation on floodplains
Authors: Rameshwaran, Ponnambalam
Shiono, Koji
Keywords: Quasi two-dimensional model
Overbank flow
Emergent vegetation
cCmpound channel
Drag force
Issue Date: 2007
Publisher: © Taylor & Francis Ltd.
Citation: RAMESHWARAN, P. and SHIONO, K., 2007. Quasi two-dimensional model for straight overbank flows through emergent vegetation on floodplains. Journal of Hydraulic Research, 45 (3), pp. 302 - 315.
Abstract: The paper presents a quasi two-dimensional (2D) model calculating depth-averaged velocity and bed shear stress in a straight compound channel with a vegetated floodplain. The model numerically solves the depth-averaged Navier–Stokes equation for the streamwise motion of flow (quasi 2D). Reduction in volume of water due to vegetation is modelled as porosity. Drag force due to vegetation is modelled as an additional momentum sink term in the Navier–Stokes equation. Estimation methods for model parameters—drag coefficient, shading factor, porosity, friction factor, eddy viscosity and advection term—are discussed. The predictive capability of the model is assessed against experimental data with regard to distributions of depth-averaged velocity, bed shear stress, transverse shear stress and stage-discharge. The results show that the quasi 2D model reproduces a reasonable simulation of the flow field.
Description: Closed Access. This article was published in the Journal of Hydraulic Research [© Taylor & Francis Ltd.] and the defintive version is available at: http://dx.doi.org/10.1080/00221686.2007.9521765
Version: Published
DOI: 10.1080/00221686.2007.9521765
URI: https://dspace.lboro.ac.uk/2134/11288
Publisher Link: http://dx.doi.org/10.1080/00221686.2007.9521765
ISSN: 0022-1686
Appears in Collections:Closed Access (Civil and Building Engineering)

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