Simulation Study Of Regular Wave Propagation Under The Influence Of Coplanar Currents In Vegetation Zones

Nearshore vegetation can effectively dissipate wave energy,play a role in wave elimination,and alleviate marine disasters caused by nearshore waves.The near-shore waters usually combine wave-current flow,and it is great practically significant to study the wave propagation under the influence of coplanar currents in coastal vegetation zones.There have been some research achievements about wave propagation in vegetation zones,but it is less consideration the wave motion under the influence of currents in vegetation zones.In this paper,both the physical model experiment and numerical simulation are used to study the wave propagation process under the influence of the coplanar current in the vegetation zones.The propagation of regular wave effected by coplanar currents in vegetation zones under the influence of different incident wave height,different water flow velocity and different water depth is analyzed.Main tasks as follows:(1)Simulated the propagation process of regular waves passing through vegetation zones under the influence of coplanar currents in the laboratory water tank.Based on the variation of wave height along the vegetation zones,the attenuation discipline of regular waves under the influence of coplanar currents in vegetation zones are analyzed.The influence of the incident wave height,different water flow velocity on the attenuation of the regular wave through the vegetation waters under the influence of coplanar currents.The results show that with the increase of incident wave height,the attenuation of regular waves in vegetation zones increases.When the water flow velocity is small,the attenuation of regular waves in vegetation zones under the influence of coplanar currents is slightly smaller than the attenuation of regular waves in vegetation zones under the influence of no water flow,as the current flow velocity increases,the attenuation of regular waves in the vegetation zones increases.(2)Based on the Boussinesq equation,a numerical model for regular waves propagation under the influence of the coplanar currents in vegetation zones is established.The numerical model is validated based on the experimental data.(3)Based on the constructed numerical model,the regular wave propagation characteristics under the influence of the coplanar currents in the vegetation zones are simulated and analyzed.The effects of water flow velocity,incident wave height and water depth on the regular wave attenuation under the influence of the same water flow in the vegetation zones are analyzed.The results show that with the increase of incident wave height,the wave height attenuation increases.With the increase of water depth,the wave height attenuation decreases.With the increase of water flow velocity,the wave height attenuation first decreases and then increases.