Longitudinal current induced by oblique waves along coastal structures
A. Baquerizo, M.A. Losada
Coastal Engineering, Vol 35. No.3, 211-230, [Sept. 1998]

Abstract:
The time -and depth- averaged equations in a porous medium are used to analyse how dissipation insdide an infinitely long vertical breakwater generates an alongbreakwater (AB) current inside the structure. This mean current is transferred seawards and leewards by turbulent diffusion. Based on a theoretical eddy viscosity law, an analytical solution is obtained. The mean current velocity profile depends on characteristics such as water depth, wave height, wave period and angle of incidence and on porous medium properties including porosity and friction. In the neighbourhood of the structure, the simultaneous action of waves and the AB current are taken into account to study the potential sediment transport patterns. Seawards of the structure, the obtained results may help to explain the formation of bars almost parallel to the breakwater. Under certain circumstances the presence of the breakwater enhances the sediment transport in the zone closest to the seaward face, which may induce scouring at the toe of the structure.