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Title: Modeling of vegetated rivers for inbank and overbank flows
Authors: Shiono, Koji
Takeda, M.
Yang, K.
Sugihara, Y.
Ishigaki, T.
Issue Date: 2012
Citation: SHIONO, K. ... et al., 2012. Modeling of vegetated rivers for inbank and overbank flows. River Flow 2012 - Proceedings of the International Conference on Fluvial Hydraulics, pp. 263 - 269.
Abstract: Model parameters such as friction factor and eddy viscosity in the Shiono & Knight method (SKM) are considered through experimental data obtained from a vegetated open channel. The experiment was conducted in a rectangular open channel with cylindrical rods as vegetation. Velocity, Reynolds stresses and boundary shear stress were measured with Acoustic Doppler Velocimetry (ADV) and a Preston tube re-spectively. Both friction factor and eddy viscosity were calculated using the measured data and found to be not constant in the shear layer generated by rods. The analytical solutions of SKM to predict velocity and boundary shear stress currently in use were based on the constant assumption of these parameters. In this pa-per a new analytical solution was derived by taking into a variation of these parameters account and was also verified with the experimental data. This solution was also applied to flow in compound channel with vegeta-tion. The new solution gives a good prediction of the lateral distribution of depth-averaged velocity and boundary shear stress in vegetated channels, and it predicts the boundary shear stress better than that of the original solution without considering the secondary flow term in particular.
Description: This conference paper was presented at the International Conference on Fluvial Hydraulics – River Flow 2012, September 5-7, 2012, San Jose, Costa Rica.
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/11279
Appears in Collections:Conference Papers (Civil and Building Engineering)

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