An incorporation and application of a two-dimensional, unstructured grid hydrodynamic model with a suspended sediment transport module is presented in the study. The model has a satisfactory verification with available measured data. After the verification, the variation of tidal current field and the seabed evolution are simulated. Based on the simulation results, the paper compares and analyzes the effects of different axis layouts of detached breakwater on flow field and seabed evolution. The results show that after the construction of the breakwater, the flow velocity of the both sides of the breakwater decreases, the flow velocity of the east entrance increases, and the erosion and siltation of sediment are consistent with the change of the flow field. In addition, the smaller the angle between the breakwater axis and the depth contour is, the smaller the impact on the change of the tidal current field and sediment erosion and siltation is.

该研究提出了带有悬浮泥沙输送模块的二维非结构化网格水动力模型的结合和应用。该模型对可用的测量数据具有令人满意的验证。验证之后，模拟了潮流场的变化和海床的演变。基于仿真结果，本文比较并分析了独立防波堤的不同轴线布置对流场和海床演化的影响。结果表明，防波堤施工后，防波堤两侧的流速降低，东口的流速增加，沉积物的冲蚀淤积与流场的变化是一致的。另外，防波堤轴线与深度轮廓之间的角度越小，