THREE DIMENSIONAL FLOW PROFILES ON LITTORAL BEACHES

Proceedings of the International Conference on Coastal Engineering

Ib A. Svendsen¹  Rene S. Lorenz² 

[1] Dept. of Civil Engrg., Univ. of Delaware;Lie Engineering

关键词: littoral beach;    3D flow;    flow profile;   

DOI  :  10.9753/icce.v21.%p

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

The problem of combined cross-shore and longshore currents generated by waves in and around a surf zone is considered in its full three-dimensional formulation. The equations for the two current components are decoupled and it is found that for a cylindrical coast with no longshore variations the longshore current variation with depth and distance from the shoreline satisfies a Poisson equation. This equation is solved by a perturbation method and it is shown that the longshore velocities are always larger than the velocities found by classical theory. In the simple uncoupled case, the full 3-D current profile is constructed by combining the results with cross - shore velocities determined in previous publications. Also, the total velocities are larger than velocities found from simple depth averaged models.

【 授权许可】

Unknown