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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/11280

Title: Modelling vegetation effects in irregular meandering river
Authors: Sun, Xin
Shiono, Koji
Rameshwaran, Ponnambalam
Chandler, Jim H.
Keywords: Bed shear stress
Eddy viscosity
Flow resistance
Numerical model
Issue Date: 2010
Publisher: © Taylor & Francis Ltd.
Citation: SUN, X. ... et al., 2010. Modelling vegetation effects in irregular meandering river. Journal of Hydraulic Research, 48 (6), pp. 775 - 783.
Abstract: A numerical investigation of vegetation effects on the hydrodynamics of the Blackwater River, Hampshire, UK, is presented. The computational code Telemac-2D was applied to simulate a flood event in an irregular meandering reach. Velocities were measured at three cross-sections using Acoustic Doppler Current Profiler and Acoustic Doppler Velocimeter. With these, the friction factors for the main channel and the floodplain were calibrated. A uniform Manning coefficient method and an emergent vegetal drag force method to specify flow resistance of vegetation on the floodplain were used to compare flow simulations. An attempt was made to assess the accuracy of the constant viscosity model, the Elder model and the k-ϵ model. Simulated hydraulic parameters were used to assess the boundary shear stress. The vegetation greatly influenced flow behaviour, reducing both velocity and boundary shear stress as the drag force increases. These results can guide practising engineers in estimating flood conveyance and improve the understanding of bed shear behaviour in rivers with vegetated floodplains.
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/10.1080/00221686.2010.531101
Version: Published
DOI: 10.1080/00221686.2010.531101
URI: https://dspace.lboro.ac.uk/2134/11280
Publisher Link: http://dx.doi.org/10.1080/00221686.2010.531101
ISSN: 0022-1686
Appears in Collections:Closed Access (Civil and Building Engineering)

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