Abstract
A low-crest seawall with a drainage, which is composed of a seawall and a backside parapet, has been constructed to reduce wave overtopping volume efficiently. In this situation, it is necessary to evaluate the influences of water elevation in a drainage on the wave overtopping volume into a land.
The purpose of this study is to investigate the reduction effects of wave overtopping volume on a low-crest seawall with a drainage and to estimate the water elevation in a drainage by a one dimensional unsteady flow analysis and the experimental data. As results, it is found that it is important to control wave elevation in a drainage behind a low-creat sewall for reduction of wave overtopping volume on a backside parapet. Moreover, it is possible to estimate every temporal-spatial distribution of the water elevation in the drainage by a one dimensional unsteady flow analysis.
