Application of Shiono and Knight Method to Compound Open Channel Flow with One-Line Emergent Vegetation

Xin Sun; Koji Shiono; Xiao Ying Fu; Ke Jun Yang; Ting Lin Huang

doi:10.4028/www.scientific.net/AMR.663.930

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 663Application of Shiono and Knight Method to...

Application of Shiono and Knight Method to Compound Open Channel Flow with One-Line Emergent Vegetation

Abstract:

A quasi two-dimensional model was developed to calculate depth-averaged velocity and bed shear stress in a straight compound channel with one-line emergent vegetated at the floodplain edge. Reduction in volume of water due to vegetation is modelled as porosity. Drag force due to vegetation is modelled as an additional momentum source term in the Navier-Stokes equation. Estimation methods for model parameters—friction factor, roughness height due to drag force, porosity, 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 and boundary shear stress. The results show that the quasi 2D model well reproduces a reasonable simulation of the flow field under relative water depths of 0.24 and 0.52.

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Periodical:

Advanced Materials Research (Volume 663)

Pages:

930-935

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.663.930

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Online since:

February 2013

Authors:

Xin Sun, Koji Shiono, Xiao Ying Fu, Ke Jun Yang, Ting Lin Huang

Keywords:

Boundary Shear Stress, Compound Open Channel, Depth-Averaged Velocity, Emergent Vegetation, Shiono and Knight Method

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