STOCHASTIC CHARACTERIZATION OF OCEAN DEPTH AND FILTER APPROXIMATIONS FOR WAVE KINEMATICS

A rational procedure for characterization of water depths, shallow or deep, for a random sea state is developed, in context with linearized wave theory. The usefulness of employing the expressions for simulatio n of 'intermediate water depths' is pointed out. Numerical algorithms for horizontal and vertical propagation of water kinematics are develo ped. Several techniques, involving both digital and analog filters, ar e used. The filter coefficients are obtained as functions of the propa gation distance which is normalized by the local water depth. This pro cedure is proposed as an alternative to the conventional method of wav e kinematics simulation which involves superposition of harmonics with random phases.