NUMERICALANALYSIS OF CHANNEL DEFORMATION WITH VEGETATION ZONE

Abstract

Channel deformation with bank erosion induced by the interaction between the flow and the vegetation along a water margin are investigated in the paper by numerical analysis. Some kind of LES model for flow field and the slope collapse model for movable bed evolution were applied. It can be realized that the river channel migrates laterally just upstream of the vegetation zones, if they set diagonally along the both sides of water margins. Comparison between the numerical result and the experimental one was conducted, and then the validity of the numerical model was verified.