Effects of Permeable Breakwater on Shallow Wave Propagation

Wave propagation is considerably affected by the existance of permeable breakwaters. The energy of the incident wave is partially reflected, partially transmitted and partially dissipated within the structure. The reflection-transmission properties of a breakwater depend both on wave dynamics and on the physical and geometrical characteristics of the structure. In this paper an analytical model is presented for simulation of shallow wave propagation through a pervious breakwater. The analysis is based on the principles of continuity and momentum balance. The wave is considered as linearized and frictional. Water motion within the structure is described by both Darcy and Dupuit-Forcheimer theories. The breakwater is assumed of rectangular shape and homogeneous. Comparison of the model with other theories and experimental data showed satisfactory agreement.