Numerical modelling of the migration direction of tidal sand waves over sand banks

Tidal sand waves are large-scale bed forms found in shallow sandy seas, which show a migration of several meters per year. Field data from the Dutch part North Sea revealed pattern causing bidirectional over bank, resulting wave uphill both sides bank. In order to understand physical mechanisms behind this behaviour, we study inclusion bank under field using numerical model Delft3D. First, schematized set-up (i.e. bathymetry and simple tidal forcing) showed that alteration flow by resulted tide-averaged horizontal towards top Second, case was performed more complex used (bathymetry forcing identical site where an offshore wind farm is developed). Here, results directions comparable observations. The open opportunities explore modelling patterns fields for development areas with bathymetric environments.