2008 年 24 巻 p. 891-896
The aim of this study is to investigate the characteristics of the height and depth of breaking waves for periodic waves, considering the effects of the groundwater table on them. A hydraulic model experiments and numerical simulation are performed to accomplish the aim. The experimental results of breaking index including the breaking wave height and breaking point on a gravel beach are compared with the existing experimental data on a sandy beach and the proposed breaking wave formula for computing breaker height and depth. Experimental results indicate that the higher the groundwater table, the deeper breaking point. Further, the breaking wave height is smaller than that in a sandy beach. The numerical model based on N-S equation solver is found to reproduce the wave fields affected by the groundwater table and its results are in close agreement with the laboratory data.