Abstract
In this study, mechanisms of suspended sediment transport in a vegetation area in an open channel were investigated by using an experimental flume that was equipped with pile groups. Flow structures in a flume was observed by the Particle Image Velocimetry (PIV) technique for particles of neutral buoyancy and relatively heavy materials. The experimental results show that the deposition of the suspended sediment particles in the vegetation area is influenced by the relative scales between the particle size and the representative scale of the turbulence in the vegetation area.