Abstract
Horizontal large eddies and water level fluctuation appear periodically near vegetations in river flow. To estimate the flow pattern and water level fluctuation 2D-numerical model was developed. Experiment and 2D-numerical analysis of the river flow were performed focussing on the lateral mixing due to horizontal large eddies. The computational results of flow pattern and water level fluctuation agreed with experimental results. As the result, it became clear that flow pattern and distribution of shear stress in the river flow with vegetations can be estimated accurately, by the mothod presented in this paper.
