This hydrodynamic model Mutant IDH1-IN-1 based on the numerical solution of three-dimensional incompressible Reynolds averaged Navier–Stokes equations invoking the assumptions of Boussinesq and of hydrostatic pressure (DHI, 2011). The model consists of continuity and momentum equations and is closed by a turbulent closure scheme (DHI, 2011). The water density was assumed to be homogenous (barotropic formulation).
The modelling domain was approximated with prisms (triangles in horizontal plane) using a flexible mesh approach. The length of the triangles\' sides varied from approximately 40 to 90 m.