Integrated model for beach nourishment design, post-nourishment monitoring and beach-maintenance refills

The Grain-size Nourishment Model (GNM) is a new numerical model that forecasts in 3D the littoral features following the nourishment intervention. Its predictions concern: (a) beach and shoreface morphology; (b) shoreline position; (c) geometry of the artificial deposit; (d) sediment amount for the intervention; (e) geographic distribution of sedimentological parameters (mean size, sorting, percentage of sand and mud). Theory and principles of calculation are presented in this paper together to two applications of the model.