The long term morphological changes originate from long term variations in the morphological system (e.g. river input), gradient in the longshore sediment transport and long term variations in the hydrodynamic conditions. The short-term morphological changes originate from beach profile variations due to cross-shore sediment transport as a result of seasonal and yearly variations in the wave and current conditions.
Bed forms (e.g. sand waves) may be generated, develop and migrate on an erodible seabed. The development of bed forms may result in seabed changes. The dynamics of possible bed forms will be assessed based on the available bathymetry data and the metocean data. The stability and possible migration behaviour of sand waves will be evaluated.
Numerical modelling can be applied to compute the longshore and cross-shore sediment transport rates and the resulting coastline evolution and cross-shore profile evolution.