Numerical study on the influence of salt marsh plants on coastal wetland hydrodynamics and suspended sediment transport

Salt-marsh plants play important roles in the hydrodynamics and sediment transport deposition processes coastal regions. The Delft3D model was applied to quantify influence of salt-marsh on hydrodynamic characteristics suspended a wetland, reveal contribution trapping local area. Specifically, spatial distributions were acquired from remote sensing images coupled with model. A comparison showed that modeled results observed data fit very well. indicated salt marsh had negligible effect tidal level, but they did significantly affect flow velocity flux, as by obvious slow-flow zones vegetated belts. Phragmites australis attenuated more than Suaeda heteroptera . We also found concentration lower P. S. areas because resistance created vegetation prevented being resuspended helped trap sediment. Numerical experiments further confirmed flux obviously different without vegetation. interception could reduce 60%.