Abstract
This study examined the morphological behavior of the bed in an open channel flow with vegetation effects by means of a depth-averaged two-dimensional numerical model. We simulated the channel morphodynamics under the experimental conditions and characteristics of channel morphology can be reproduced numerically. In order to take into account the effect of vegetation, a vegetation model (germination-growth-death) is also incorporated. The numerical results showed that general characteristics of the bed morphology simulated by the present model are in compatible with the features pointed out in the previous papers. The agreements between the computations and the experiments were generally good. The present computations, not only support the previous empirical and theoretical results on river morphology, but also show that the present computational model is a powerful tool to predict river morphology under effects of vegetation.
