Abstract
The vegetation in rivers significantly affects the flow resistance and reduces the flood carrying capacity. A lot of studies have been performed on the flow structure at the presence of the riparian vegetation. Many of them have focused on the flow characteristics in fully developed regions. Few studies have discussed the development process through submerged vegetation and the effects of vegetation inclination. Putting the main emphasis on the flow characteristic in the wake region of the vegetation zone, this study aims to understand the flow development process through submerged vegetation and to clarify the influence of inclined vegetation model. It is shown that the primary velocity and the turbulent shear stress take the maximum values just after the end of vegetation zone and gradually recover the profiles over the flat bed. It is also demonstrated that the inclination of vegetation model induces the decrease in flow resistance and the increase in primary velocity in the vegetation layer, which may come from the different flow field around inclined vegetation models from the vertical vegetation models.
