Abstract
A new hybrid parametrical model for predicting ocean waves in deep water is presented in this paper. The model assumes that the directional energy of wind-sea defined separately for each direction grows in parametrical form according to the ideal generation condition and that each swell component propagates independently, undergoing energy dissipation. The model is formulated to estimate the time variation of directional spectra at a prescribed location through the computation along the straight wave rays focusing at the location. The computed results for test cases given in SWAMP show physically sound behaviour in each case and the hindcasted wave heights and periods during some typhoons in the Pacific Ocean are in reasonable agreement with the observed ones. These verify the consistency and applicability of the present model.
