象山港潮波响应和变形研究──Ⅲ.潮滩位置和平流效应对M_4分潮的作用

Tide response and tidal wave distortion in the Xianshan Bay-Ⅲ. Numerical modelling study in a ideal rectangular bay

通过半封闭矩形理想海湾的潮波运动数值模拟，分析了潮滩及平流效应对M4分潮的生成和增长的影响．结果说明潮滩的作用不但依赖本身的规模和湾内潮波非线性的强弱，而且与潮滩在湾内所处位置关系很大．在存在M4分潮共振的海湾中，平流效应可以抑制共振对M4分潮的放大作用．

The contribution of the tidal flat and tidal currents advection to the generation and growth of M4 tidal component isanalyzed by using a numerical modelling in a ideal semi-enclosed rectanglular bay. The result shows that the contribution of tidal flatdepends not only on the location and dimension of the tidal flat, but also on the non-linearity of the tide in the bay. The amplitudeof the M4 tidal component is inhibited by the advection in the bay where there is the M4 tide co-oscillation.