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该文基于XBeach模型开展海平面上升导致波浪作用强度增加对岸滩演变的影响数值计算研究,通过经典波浪水槽实验及现场观测数据对模型进行验证,结果表明该模型可以准确地模拟波浪向岸传播过程中波高及流速的变化,能较好地预测波浪作用下岸滩的冲淤演化趋势,可用于岸滩演变冲淤变化数值计算研究。在Delta Flume实验的基础上,探讨海平面变化与岸滩演变之间的关系,结果表明,海平面上升和静水面位置变化是引起海岸动力作用强度不同的原因,在波浪作用不同的时间段,海平面上升直接淹没导致的岸线蚀退和海岸动力强度变化导致的岸线蚀退分别占据岸线蚀退总量的主导地位。
Based on the XBeach model, a numerical study of the effect of sea level rise on the beach evolution is carried out. The model is verified by the classical wave tank experiment and field observation data. The results show that the model can accurately simulate the wave propagation process The change of mid-wave height and velocity can predict the trend of scouring and silting evolution of the beach under the action of waves, which can be used to study the numerical calculation of scouring and silting of the beach evolution. Based on the Delta Flume experiment, the relationship between the sea level change and the shoreline evolution is discussed. The results show that the sea level rise and the change of the hydrostatic surface position are the causes for the different strength of the coast dynamic forces. At different time periods, The eroded shoreline caused by the direct inundation of sea level rise and the shoreline dynamic intensity change, respectively, dominate the total amount of eroded shoreline.