象山港三维潮流特性的数值模拟

Numerical simulation of characteristic of 3-D tidal flow in Xiangshan bay

应用非结构有限体积海岸和海洋模型(FVCOM)建立象山港区域的高分辨率三维潮流数值模型。该模型水平方向采用非结构的三角形网格,使得能够更好地拟合象山港内众多岛屿和复杂曲折的不规则岸线边界,垂向采用σ坐标,考虑了湾内水道地形变化剧烈的特点。模型计算结果与实测结果吻合良好,较好地模拟了象山港内潮流场的时空分布特点,简要分析了余流场的三维特性。

A high resoluton numerical model of 3-D tidal flow in Xiangshan bay is setup with the finite-volume coastal ocean model （FVCOM） besed on unstructured grid. The triangular grids are used to fit for the irregular coastal boundary and islands, the a-coordinate transformation is used in the vertical direction in order to consider the representable, irregular bottom topography in the model. The results show that the computed values fit very well with the measured data. The model is better to simulate the temporal and spatial characteristics of tidal flow and residual current in Xiangshan bay.