A method of the submerged object’s motion forecast based on oceanographic and atmosphere operational models is described. High resolution fields of sea currents shall be calculated using a simplified barotropic local model in the area of the object with the boundary conditions from the operational oceanographic global model. The domain of high resolution calculations shall be defined automatically depending on the object’s probable position, local bathymetry and the latest available global forecast. Higher resolution of the predicted local current field can be achieved by means of the shape function commonly used in the finite element method.
This paper gives a general overview of Polish experience and achievements with regard to hydrodynamic modelling in the Polish zone of the Baltic Sea. The first work started already at the end of the sixties when the first 1D and 2D hydrodynamic models were set up. With the development of numerical methods and increasing computational power a number of 1D, 2D and 3D models were set up and tested. Global, regional and local models cover the most important water bodies, i.e. the Pomeranian Bay – Szczecin Lagoon and Gulf of Gdańsk – Vistula Lagoon systems.