Flow and transport in channels with submerged vegetation

摘要: This paper reviews recent work on flow and transport in channels with submerged vegetation, including discussions of turbulence structure, mean velocity profiles, dispersion. For canopies sufficient density, the dominant characteristic is generation a shear-layer at top canopy. The generates coherent vortices by Kelvin-Helmholtz (KH) instability. These control vertical exchange mass momentum, influencing both profile, as well turbulent diffusivity. flexible canopies, passage KH progressive wave along canopy interface, termed monami. formed penetrate distance δe into penetration scale segregates an upper layer rapid lower slow transport. Flushing enhanced energetic shear-scale vortices. In limited to length-scales set stem geometry, resulting significantly slower than that layer.