Modelo morfodinâmico com transporte litorâneo longitudinal e transversal para aplicações de engenharia

Abstract

Numerical Models are tools frequently used to study nearshore processes. Several strategies are employed by the various modelling systems to represent the longshore and cross-shore sediment transport in the surf zone. The calibration of these models is a challenge, especially for the case of beach profile evolution models. This work presents a 2DH coastal morphodynamic model for use in Engineering problems. This model consists of the coupling between a model of longshore transport model, already well established and based on the formula of Van Rijn (2007), and cross-shore transport model, which is based on the Kriebel & Dean (1984) formula and is the main subject here studied. The Kriebel & Dean (1984) formula provides the solid discharge, for a given sediment, from the knowledge of the water column at each point of the surf zone, of which values are previously calculated with a hydrodynamic model coupled with a wave model. The model was validated with results of physical model and tested for beach morphodynamics simulation of typical Coastal Engineering problems. One also presents a methodology for prescribing adequate boundary conditions in the open boundaries of coastal hydrodynamic models.