2021 Volume 77 Issue 2 Pages I_43-I_48
Wave dissipating performance of long-period wave absorbing mounds having a water chamber was investigated by hydraulic model tests. It was found that the mound with a water chamber was more effective when the tide level was low and the crown of the mound was exposed. It was also found that the wave dissipating performance was improved by setting the crown height of the mound a little higher than the mean water level, when the non-dimensional structure width (B’+B*)/L was less than about 0.08. In addition, numerical analysis based on the VOF method was conducted to reproduce the hydraulic model experiments. It was shown that the reflection coefficients can be estimated accurately by using the measured coefficients for the resistance in the permeable layer and considering the effect of the KC number.
