2012 Volume 68 Issue 2 Pages I_573-I_581
Better management of riparian vegetation for flood control and environmental preservation requires in-depth understanding of flow characteristics in the presence of vegetation. This study aims at clarifying the flow resistance due to floodplain vegetation in compound channels through experiments with the help of numerical simulation. The effects of the size and the location of vegetation zone on the stage-discharge relationship and vegetation distributions are discussed. It is found that separated vegetation belts near the edge of the floodplain give higher conveyance than the continuous vegetation belt. A spectrum analysis of the instantaneous velocity components indicates that the streamwise scale of the large vortex near the interface is correlated with the carrying capacity of flow.
