We discuss the characteristics of the first order advection scheme in coastal areas. In particular we focus our attention on the relationship between the geometry of the coast, as represented in the computational grid, and the wave fields derived from a numerical model. Having considered an alternative scheme, we show how the results may depend substantially on the characteristics of the scheme. It follows that, when modelling in coastal areas, the grid distribution and the advection scheme should be chosen taking reciprocal account of their characteristics
