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一、引言江苏沿岸以其岸线多变和独特的辐射状沙洲而著称于世。对于形成该海域独有的地貌形态的动力机制,比较一致认为:苏北沿岸独有的潮波系统所形成独特的潮汐运动是塑造这一辐射状沙洲的主要营造力。对于苏北沿岸的潮汐运动,我们曾根据实测资料作过初步分析。以后,又应用边值方法模拟过该海域主要分潮的潮运动。但是,鉴于当时的情况,模拟结果,尤其是潮流部分,未经实测资料校核。文献[3]在模拟黄海M_2分潮时,也重点探讨过该海域潮运动特征。但因使用较为粗的网格,所以难以反映江苏沿岸的地貌特征。为了更深刻认识该海域潮汐运动的特征,以进一步探讨它与地貌发育的关系。本文采用相对较细的网格尺度,应用有限差分方法模拟了在该海域潮汐运动中起支配作用的M_2分潮。差分格式取于文献[4],将计算结果与实测资料进行了较为详细的比较。结果表明,两者基本符合,尤其是潮流的计算结果更是令人满意。
I. Introduction Jiangsu coast is famous for its varied and unique radial sand bar. For the dynamic mechanism of forming unique landform of the sea area, it is agreed that the unique tidal movement formed by the unique tidal wave system along the coast of Jiangsu Province is the main creative force that shaped this radial sand bar. For the tidal movement along the coast of North Jiangsu, we conducted a preliminary analysis based on the measured data. Later, the boundary value method was applied to simulate the tidal motion of the main moisture in the sea. However, given the prevailing circumstances, the simulation results, especially the trendy parts, have not been verified by the measured data. The literature [3] also focused on the characteristics of tidal motion in the sea when simulating the M 2 tide in the Yellow Sea. However, due to the use of thicker grids, it is difficult to reflect the landscape features of the coast of Jiangsu. In order to further understand the characteristics of the tidal movement in this area, the relationship between it and the development of geomorphology is further discussed. In this paper, the relatively small grid scale is used to simulate the M 2 tide that plays a dominant role in the tidal movement in this area by using the finite difference method. The difference format is taken from the literature [4], the calculation results are compared with the measured data in more detail. The results show that the two are basically in line with each other, especially the trend calculation is more satisfactory.