Abstract
Wave overtopping on a seawall can be calculated in a numerical wave flume, such as CADMAS-SURF which solves Navier-Stokes equations with combination with VOF method. On the other hand, a two-dimensional Boussinesq-type wave transformation model has been expanded for evaluating overtopping discharge with applying the overflowing formula. The overflowing depth, however, is still underestimated because of limit of surface boundary condition, in addition to the weak-nonlinearity and the error in difference method. In this study, it is revised with amplifier coefficient which is evaluated in comparison with measured and calculated water surface elevations in front of a seawall. Moreover, wave overtopping and inundation on a seawall equipped some drains are calculated by using the Boussinesq-type wave transformation model.
