Abstract
This study deals with the computation methods for drag force of permeable layer in the numerical wave flume CADMAS-SURF. Two models using the drag coefficient and Dupuit-Forchheimer law are available to compute the drag force in CADMAS-SURF. The reflection coefficient and overtopping quantity are taken as the evaluation indices, and the numerical computations and laboratory experiments are conducted using regular waves and a conventional revetment that consists of rubble or wave-dissipating blocks to investigate the applicability of the models. It is shown that the numerical results obtained from the model using Dupuit-Forchheimer law agree reasonably well with the experimental data.
