Wave Height Transformation and Set-up Between A Submerged Permeable Breakwater and A Seawall

作者：Tsai Ching piao^*; Yu Chien hung; Chen Hong bin; Chen Hsin yu

来源：China Ocean Engineering, 2012, 26(1): 167-176.

DOI：10.1007/s13344-012-0012-6

• wave height transformation
• water piling-up
• wave set-up
• submerged permeable breakwater
• seawall
• time-dependent mild-slope equations

In this study, we investigated wave transformation and wave set-up between a submerged permeable breakwater and a seawall. Modified time-dependent mild-slope equations, which involve parameters of the porous medium, were used to calculate the wave height transformation and the mean water level change around a submerged breakwater. The numerical solution is verified with experimental data. The simulated results show that modulations of the wave profile and wave set-up are clearly observed between the submerged breakwater and the seawall. In contrast to cases without a seawall, the node or pseudo-node of wave height evolution can be found between the submerged breakwater and the seawall. Higher wave set-up occurs if the nodal or pseudo-nodal point appears near the submerged breakwater. We also examined the influence of the porosity and friction factor of the submerged permeable breakwater on wave transformation and set-up.

• 出版日期2012-3