Quasi 3D model of wave-induced currents in coastal zone

The present model allows for simultaneous computations of depth-variable longshore currents and undertows, being the two most important components of coastal flows, at arbitrarily chosen locations of the nearshore zone, with the assumption of parallel isobaths. In the model, the flow velocities are calculated as functions of energy dissipation due to wave breaking. In the description of the wave-breaking, the effect of a roller has been taken into account. As a result of interaction of the cross-shore and longshore currents, a spiral-like resultant velocity vector appears, variable over water depth. The comparisons of calculated and measured vertical distributions of water flow velocity for conditions of the campaigns "Lubiatowo 87" and "Lubiatowo 96" have shown good conformity between experimental data and the present model.