Responses of Bed Morphology to Hydrological Events with Effect of Vegetation

Abstract

In this study, we simulated river flows and morphological changes on a sharp meandering channel, which consists of sand topography, to evaluate the secondary flow effects, the development of point-bar and braided channel with the vegetation effect using a two-dimensional numerical model, iRIC software. In the simulation results, meandering channel with vegetation showed diverse river bed deformations, such as braided channel, sub-meandering channel, mid-channel bars, and a point-bar. In particular, vegetation area is changed by flood events, and then vegetation changes the flow characteristics and river environment.