側岸に沿って植生群落のある流路での水面変動を伴う横断混合

抄録

Appreciable surface waves appear for flow in an open channel with longitudinal zone of vegetation and they are expected to play an important role for transverse mixing. By flume experiments of flow with model vegetation, the characteristics of surface wave and the correlation properties between waves and velocity fluctuations are investigated to confirm that they contribute the transverse momentum mixing. By treating vegetated and non-vegetated zones as respectively one-dimensionalized channels but with boundary shear and transpiration through the boundary, the correlation properties are interpreted. Furthermore such a modelling of flow leads a linear instability analysis of water surface fluctuation of flow in vegetation zone.