Abstract
Hydraulic characters of a Flaring Shaped Seawall (FSS) with a slit type wave absorbing structure installed on a mound are investigated through experiments with a two-dimensional wave tank. A row of circular columns is arranged in front of the seawall in order to reduce breaking wave pressure without disturbing an excellent checking effect of a wave overtopping. A critical wave height, which is defined as a maximum wave height on which no wave overtopping occurs at all, was measured on different incident wave conditions as well as mound shapes. The wave pressure distributions on the seawall, the wave reflection coefficient, and wave-overtopping rate were also measured. The reduction effect of the breaking wave pressure by the slit type wave absorbing structure is discussed under various incident wave conditions. And then, influences of the slit type wave absorbing on the wave reflection coefficient and wave-overtopping rate are also discussed in this study.
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