This paper describes the Numerical and Physical Modelling components of the main project entitled "Viability study of the artificial surfing reef of S. Pedro do Estoril". These studies aim to establish the main characteristics (dimensions, orientation and location) of the artificial surfing reef for S. Pedro do Estoril and to analyze its hydrodynamic peifonnance for different incident wave conditions. The main conclusions of both studies were that the reef solution permits the improvement of the surf conditions in the area of S. Pedro do Estoril especially for the most frequent wave in the region. However, in both studies some problems related with strong reflection and vortices in the reef's corners where detected and should be improved in the final solution.

This paper describes the experiments performed at the National Laboratory for Civil Engineering (LNEC) aiming at simulating, in a flume, the wave propagation along a constant slope bottom that ends on a sea wall coastal defence structure, a common structure employed in the Portuguese coast. The objective of these tests is to calibrate the parameters of FUNWAVE, a Boussincsq type model, for wave propagation in coastal regions. This is the first step in the validation of a methodology to combine numerical and physical models in the study of the interactions between beaches and structures. This work is performed in the framework of the Composite Modelling of the Interactions between Beaches and Structures (CoMIBBs) project, a joint research activity of the HYDRALAB III European project.