抄録
Aquatic plants reduce suspended sediment transport because of the local reduction in bed shear stress. Therefore, it is very important for river environment to reveal the mass and momentum exchange near the vegetation zone. Turbulent diffusion mechanisms in emergent vegetated flows have recently been investigated by many researchers. However, the effect of the submerged vegetation on the turbulent mixing process has not been fully investigated. So, in the present study, the combination of PIV and planar laser-induced fluorescence (LIF) technique is applied to the vegetated open-channel flows. Two-dimensional data allow the identification of coherent structures and quantification of the vertical mass transport.
