Tsunami Over Composite Breakwater
This study presents a stability estimation method of armor units to cover a rubble mound of a caisson breakwater against tsunami overflow while taking account of the influence of the shape of superstructures of the caisson. In this method, the required mass of the armor units is obtained from the impinging velocity onto the rear side mound which is calculated by using overflow depth. Accordingly, the influence of the shape of superstructure is taken into account directly. The validity of this method is confirmed by comparing with the results of hydraulic model experiments conducted in a wide range of conditions.