Short-wave and wave group scattering by submerged porous plate

An analytical solution for waves propagating through a horizontal porous pl ate of finite thickness is obtained. The objective of the plate is to reduc e the incident short-wave energy and the long-wave energy as well. Conseque ntly, in this study the plate is analyzed in a global perspective [i.e., co nsidering its response to obliquely incident short waves (both regular and irregular) and wave groups (with the consequent generation of free and lock ed long waves)]. To solve the propagation of regular and irregular waves, a n eigenfunction expansion is used and the results are verified with experim ental data showing good agreement. The propagation of a wave group past a h orizontal porous plate is studied using a multiple-scale perturbation metho d, and an analytical solution is presented. The results show that the gener ated long waves are present on both sides of the plate and that maximum sho rt-wave reflection is associated with maximum long-wave transmission.