潮汐和流影响下长江口波浪场数值计算

采用SWAN模型和REF/DIF模型进行嵌套计算的方法来获取长江口海域实际波浪场.其中设计一种根据入射波向即时生成计算网格的方法,解决REF/DIF模型对于波浪入射角的限制从而实现两种模型的嵌套.为考虑水流和潮位分布的空间差异对波浪传播变形的作用,利用二维流场模型计算长江口的水位和流场过程,在实际波浪计算中引入了水位和水流作用.计算结果与观测资料的对比表明:1)SWAN模型和REF/DIF模型的嵌套计算方法可以作为提高浅水区域波浪计算精度的一种有效途径;2)水位和水流对长江口波浪计算的影响显著,考虑了水位和水流条件后,尤其是在大潮期间,能比较显著地提高计算精度.

Numerical calculation of wave fields with tide and currents in Yangtze estuary

The nested calculation of SWAN model and REF/DIF model are adopted to simulate the wave fields of Yangtze estuary.The outer boundaries of REF/DIF model are determined by using SWAN model as the SWAN model can not accurately calculate the diffraction effect and the outer boundary condition of REF/DIF model can not be given easily.A new variation grid generation method is established to solve the wave direction restriction in up-wave boundary of parabolic mild slope equation while adopted to calculate practic...