A coupled modeling scheme for longshore sediment transport of wave-dominated coasts—A case study from the southern Baltic Sea |
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| Institution: | 1. Institute of Physics, Ernst-Moritz-Arndt-University of Greifswald, Felix-Hausdorff-Str. 6, D17489, Greifswald, Germany;2. Institute of Marine and Coastal Sciences, University of Szczecin, Mickiewicza 18, 70-383 Szczecin, Poland;1. Department of Physical Culture and Health Promotion, University of Szczecin, Szczecin, Poland;2. Department of Clinical and Molecular Biochemistry, Pomeranian Medical University, Szczecin, Poland;3. Liver and Internal Medicine Unit, Department of General, Transplant and Liver Surgery of the Medical University of Warsaw, Warsaw, Poland;4. Department of Surgery, M. Curie Hospital, Szczecin, Poland;5. Medical Biology Laboratory, Pomeranian Medical University, Szczecin, Poland;1. Institute of Mathematics, University of Szczecin, Wielkopolska str. 15, 70-451, Szczecin, Poland;2. Department of Applied Mathematics, Kharkov National University, Svoboda sqr., 4, 61022, Kharkov, Ukraine;1. Department of Psychiatry, Pomeranian Medical University, Szczecin, Poland;2. Department of Pharmacology, Institute of Psychiatry and Neurology, Warszawa, Poland;3. Dialogue Therapy Centre, Warszawa, Poland;4. Institute of Psychology, Department of Clinical Psychology, University of Szczecin, Szczecin, Poland;1. Laboratoire Domaines Océaniques, UMR6538, Institut Universitaire Européen de la Mer, Place Nicolas Copernic, 29280 Plouzané, France;2. Laboratoire Environnements Sédimentaires, UR GM, IFREMER, BP 70, 29280 Plouzané, France;3. Centre Scientifique et Technique Jean Feger, Total, Avenue Larribau, 64018 Pau, France |
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| Abstract: | A modeling scheme based on dynamic coupling of a high-resolution 1D cross-shore model to a 2DH area model is developed to calculate the total longshore sediment transport (LST) rate in wave-dominated coasts. The purpose of this coupling strategy aims at resolving the LST with a high-resolution (both temporally and spatially) inside the surf-zone and with a coarser spatial resolution seaward of the surf-zone. The 2DH area model operates on a fixed pre-designed regional grid (parent grid) and the 1D cross-shore model is dynamically coupled to the boundary of the parent grid with a time-varying domain, starting from the first wave breaking point and ending at the maximum wave set-up point. The time-varying domain is generated in the 1D model by resolving the landward wave propagation from the offshore conditions provided by the 2DH area model at every time step. With a high-resolution cell size the 1D model resolves the wave propagation processes and resulting LST along the profile. The coupled model is applied to study the LST in the Pomeranian Bight at the southern Baltic Sea. Simulation results are compared with three other different hierarchical modeling methods (from empirical formulas such as CERC and Kamphuis to a 2DH area simulation). The comparative study indicates that the dynamically coupled model can be a reliable tool in practical applications, especially for the areas where hydrodynamics is controlled by complex bathymetry (e.g., multiple longshore bars) or morphologically induced circulation patterns. |
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