A revetment parapet has the capability of reducing the volume of overtopping wave, and it is also known that its effectiveness largely depends on its own characteristics, such as curvature radius, installation angle, and inclination of slope face. Regrettably, the relationship between the capability and the characteristics is not yet quantitatively known, constituting a bottleneck in constructing such a revetment. In view of the fact below, this study reveals the volume of overtopping wave that could occur at a given beach of the Ise Bay. The data collected there is based on experimentally changed wave conditions, depth of the revetment foot in water, and parapet specifications, and a hydraulic model is used in the test. By using an upright revetment equivalent crown height coefficient, a diagram of estimated overtopping wave volume is prepared in relation to a given wave height, revetment foot depth in water, and crown height from one shape of the parapet to another.
