A new type numerical model for action balance equation in simulating nearshore waves

Several current used wave numerical models are briefly described, the compu ting techniques of the source terms, numerical wave generation and boundary conditions in the action balance equation model are discussed. Not only th e quadruplet wave-wave interactions, but also the triad wave-wave interacti ons are included in the model, so that nearshore waves could be simulated r easonably. The model Is compared with the Boussinesq equation and the mild slope equation. The model is applied to calculating the distributions of wa ve height and wave period field in the Haian Bay area and to simulating the influences of the unsteady current and water level variation on the wave f ield. Finally, the developing tendency of the model is discussed.