Abstract
In actual rivers, many aquatic plants are often observed and they have significant effects on hydrodynamic properties. In such vegetated open-channel flows, velocity profiles are largely changed in the vertical and spanwise directions. The vegetated canopies generate coherent turbulent motions that promote momentum and mass transports between over and within canopy. It is thus needed to investigate these turbulence characteristics and coherent motions in hydraulic engineering and river environment. In the present study, we conducted a large eddy simulation in vegetated open-channel flows, and revealed numerically the turbulence structure and correlation properties in the whole depth region including within-canopy and over-canopy layers.
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