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首页> 外文会议>12th International Harbour Congress Sep 12-16, 1999 Antwerpen, Belgium >TIDAL FLUX AND WAVE EFFECTS THROUGH PERMEABLE HARBOUR BREAKWATERS
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TIDAL FLUX AND WAVE EFFECTS THROUGH PERMEABLE HARBOUR BREAKWATERS

机译：潮汐通量和波通过可渗透的海港突水的影响

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摘要

A fine resolution numerical tidal model of Ramsgate coastal region on the east coast of the Isle of Thanet, Kent, England is presented. As well as producing a general picture of tidal regimes and surface elevation, the model is designed to reflect potential impact of any offshore construction (e.g. harbour extension) on the local environment and ecology. A non-linear form of the Darcy's law is adopted to develop a simple mechanism to permit current flux through permeable harbour breakwaters at any instant of the tidal cycle. A technique, developed earlier, is also applied to investigate the pressure and mean flow distributions within a porous breakwater subject to attack by high frequency standing waves. This is done by means of application of a linear approximation of the Darcy's law to find a regular perturbation expansion (in small permeability) of velocity potential inside a breakwater. Isobars and streamlines are computed analytically for an apex breakwater and the transmission coefficient estimated for trapezoidal breakwaters.
机译：提出了英格兰肯特郡塞尼特岛东海岸拉姆斯盖特海岸地区的高分辨率潮汐模型。该模型不仅可以生成潮汐状态和地表高程的概况，还可以反映任何海上建设（例如港口扩建）对当地环境和生态的潜在影响。达西定律的非线性形式被采用来发展一种简单的机制，以允许潮流在潮汐周期的任何瞬间流过可渗透港口防波堤的电流。一项较早开发的技术也被用于研究受到高频驻波攻击的多孔防波堤内的压力和平均流量分布。这是通过应用达西定律的线性近似来完成的，以找到防波堤内速度势的规则扰动扩展（在小渗透率下）。通过分析计算出顶点防波堤的等压线和流线，并估计梯形防波堤的透射系数。

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