Numerical Simulation Of Ecological Protection And Its Influence Law For Nearshore Slope

As a new type of coastal ecological protection measure,ecological buffer zone formed by woody plants in coastal areas has attracted more and more attention in coastal revetment and ecological landscape projects.It is an urgent problem to be solved that how to carry out the research on the protection effect of wood plants on coastal structures and beaches.The numerical simulation method is used in this paper.Firstly,a theoretical model of surface wave attenuation for wave climbing along a slope under the protection of woody vegetation is proposed by including the drag forces of branches and trunks in the N-S equation.Next,the relevant algorithms of MAC are implemented by Fortran program language to track the trajectories of water particles on the free surface.The corresponding results(position of wave surface,flow field,etc.)are post-processed by Matlab.Then,taking the wave climbing along a slope of1/30 as an example,the wave propagation process along an inclined beach with or without vegetation is discussed.The validity of the numerical model is verified by comparing the numerical results and those of the previous experiments.Finally,influences of the vegetation characteristics,such as height,density and tilt angle of plant branches and those of wave factors on wave dissipation are discussed and analyzed,respectively.Additionally,the rules of wave dissipation are summarized.The calculation results of this model can also be applicable to the design of revetment structures and ecological landscape.