The Depth-Semi-Averaged model: Benchmarking and applications to 2D and 3D problems

The present work provides a number of applications of the Depth-Semi-Averaged model described in Antuono et al. (2022) for different wave conditions and geometries. These include analytical test cases, experimental benchmarks in 2D and 3D frameworks, and simulations of wave dynamics at a real coastal site. Breaking and non-breaking waves are considered, depending on the specific problem under investigation. The aim of the work is to provide an overview of the model potentialities and limits of application and to highlight its similarities and differences in comparison to existing non-hydrostatic schemes. More specifically, the model accurately captures wave propagation phenomena, including refraction and dispersion in non-breaking cases, and demonstrates satisfactory performance in reproducing wave decay caused by turbulence during breaking.