摘要
为了探讨海底地形对旋转潮波系统的影响,本文对不同底形情况下的潮波运动进行了数值试验。根据试验结果绘制了同潮图并作了讨论。其结论是:(1)对无潮点相对于矩形海域中轴线的偏移来说,摩擦的影响和海底地形的影响可能都是重要的。如果是浅水区域,这种偏移主要是由摩擦引起的,但对平均水深较深、海底在横方向上有坡度的水域来说,底形效应是导致无潮点偏移的主要因素;(2)海底摩擦仅能使无潮点偏移到中轴线的左方(如果人们面向湾顶),而底形则可能使无潮点偏移到中轴线的左方或者中轴线的右方,这将取决于海底横向倾斜的方向。
Numerical experiments are made for different bottom topographies in order to examine the effect of topography on tidal amphidromic System. Tidal charts are drawn from the obtained results and discussed. It is concluded that (1) for the shift of amphidromic points with respect to the central axes of rectangular waters, the effects of both friction and bottom topography are important. For shallow waters the shift is due mainly to friction; for waters of greater average depths and whose bottoms have slopes in the transverse direction, the effect of topography is a main factor in causing the amphidromic points shift. (2) Friction can cause the amphidromic poins to move to the left of the central axes only. topography. however. can make them move to the left or the right of the central axes, depending on the direction of the transverse slopes.
