基于FVCOM的库克海峡邻近海域潮汐模拟研究

    Tidal Simulation in Adjacent Sea Area of Cook Strait Based on FVCOM

    • 摘要: 基于有限体积三维水动力海洋数值模型FVCOM(Finite-Volume Community Ocean Model)对库克海峡邻近海域的潮汐潮流进行了数值模拟分析,同时搜集了验潮站的潮位数据及其潮汐调和分析数据,对模型结果进行了对比验证。结果表明,库克海峡两侧潮汐存在着显著差异,北侧由新西兰海岸向塔斯曼海的方向上,振幅逐渐降低,南侧由南部宽阔海域向新西兰南部岸线的方向上,振幅逐渐升高,且该区域的潮汐过程受地形和岸线影响较大。库克海峡中部存在典型的往复流,且以向南流动为主。库克海峡南侧存在的隆起地形和海沟是海峡之外该海域潮汐过程的重要影响因子,具体表现在南部海洋中隆起区域的潮流流速显著增加,流向也随之改变。与实测资料的对比结果表明,本研究的数值模拟结果与实测资料基本吻合,能够准确地模拟库克海峡邻近海域的潮汐潮流状况,为相关海洋工程建设以及科学研究等提供了重要的实验依据。

       

      Abstract: In this paper, based on the finite volume three-dimensional hydrodynamic ocean numerical model FVCOM (Finite-Volume Community Ocean Model), the tidal current in adjacent sea area of Cook Strait is numerically simulated and analyzed. At the same time, the tidal level data of the tidal station and its tidal harmonic analysis data are collected to compare and verify the model results. The results show that there are significant differences in the tides on both sides of the Cook Strait. On the north side, the amplitude gradually decreases from the New Zealand coast to the Tasman Sea, and on the south side, the amplitude gradually increases from the southern wide sea area to the eastern coastline of New Zealand. The tidal process in this area is greatly affected by topography and coastline. This typical reciprocating flow exists in the central part of the Cook Strait, and mainly flows southward. The presence of uplift topography and trenches on the south side of Cook Strait is an important influence on tidal processes in the area beyond the Strait, as evidenced by the significant increase in tidal current velocities and change in current direction in the uplift region in the southern ocean. By comparing with the measured data, the numerical simulation results of this study are basically consistent with the measured data, which can accurately simulate the hydrodynamic conditions in the adjacent sea area of Cook Strait and provide important experimental basis for related marine engineering construction and scientific research.

       

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