*2.5. Integration Procedure of Flow Model and Seabed Model*

For the integration procedure in this study, the one-way coupling algorithm is adopted for pore pressure delivery from the wave model to the seabed model. As demonstrated in Figure 1, the flow model is responsible to simulate the wave–current interaction which includes wave generation and fluid propagating according to the given wave/current characteristics. The water pressure will be extracted from the results after solving the VARANS equations, then used as the boundary conditions of seabed surface as the external loading in the seabed model, while the soil model can carry out the seabed behaviour under the external wave loading combined with the input parameters of seabed model. The displacement, the pore water pressure and the effective stresses could be determined by solving the Biot's "*u* − *p*" approximation.

**Figure 1.** The coupling process of the integrated model.
