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pressure acting on the wall. There is the upright structure with detached wave-dissipating concrete blocks, which is a kind of structure described above. In general, the detached type may be more effective measures to decrease overtopping and/or transmitted wave than the covered type. The problem is that the both of overtopping rate and transmission coefficient of the detached type cannot be estimated quantitatively. Moreover the wave pressure acting on the wall is unknown for steep bottom slope. In this study, we examine the performance of the two detached type models for bottom slope of 1/10 by physical model test and numerical simulation. The volume of fluid method is employed in numerical simulation. As a result, we can obtain the rate of overtopping, transmission coefficient and water elevation in wave chamber. It is also found out that the wave pressure acting on the wall is impulsive.

CHARACTERISTICS OF WAVE OVERTOPPING AND PRESSURE ON UPRIGHT STRUCTURE WITH DETACHED WAVE-DISSIPATING CONCRETE BLOCKS FOR STEEP BOTTOM SLOPE