Numerical study on the influence of offshore breakwaters with different heights on wave induced current and topographic evolution
Offshore breakwaters of different heights are important structures for coastal beach protection,and their morphodynamic behavior responds differently to wave action.Based on the Xbeach model,the wave-induced current and morphological evolution near the breakwater under the obliquely incident waves were first verified,then the influence of the offshore submerged breakwater on the wave-induced current and morphological evolution was analyzed,and finally the deformation of artificial sandbars and the morphodynamic behavior were analyzed.The results showed that the wave height gradient behind offshore breakwaters leads to the formation of rip currents and circulation,and when the height of the offshore breakwater is reduced,the waves will break against the submerged breakwater,resulting in the formation of onshore currents.The different wave induced currents near the breakwaters of different heights will lead to different topographical evolutions,with the increase in the height of the top of the dike,the erosional deposition near the shore would gradually increase.Artificial sandbars are constantly moving towards the shore under the action of the waves,and their height is gradually decreasing,which plays a role in supplementing the sand source to the shore.
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维普
