Abstract
A new submerged breakwater, which has several vertical plates on a low mound, was proposed to simultaneously reduce both mean water level rise and transmitted wave heights behind the breakwater. In this paper, numerous two dimensional numerical simulations were performed in order to obtain fundamental knowledge on the effects of the new submerged breakwater. Similar numerical simulations were carried out for an existing large submerged breakwater as well. Wave spectra, significant wave heights and mean water level rises behind the breakwaters were obtained from the numerical results. Comparison of them indicates that the proposed submerged breakwater can effectively reduce the transmitted wave and mean water level rise at the same time.
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