ON THE INTERACTION OF WATER WAVES AND SEABED BY THE POROUS MEDIUM MODEL

The interaction of water waves and seabed is studied by using Ya-mamoto’s model, which takes into account the deformation of soil skeletal frame,compressibility of pore fluid flow as well as the Coulumb friction. When analyzingthe propagation of three kinds of stress waves in seabed, a simplified dispersion re-lation and a specific damping formula are derived. The problem of seabed stabilityis further treated analytically based on the Mohr-Coulomb theory. The theory isfinally applied to the coastal problems in the Lian-Yun Harbour and compared withobservations and measurements in soil-wave tank with satisfactory results.