Bugajny, N., Furmańczyk, K., Dudzińska-Nowak, J., Paplińska-Swerpel, B., 2013. Modelling morphological changes of beach and dune induced by storm on the Southern Baltic coast using XBeach (case study: Dziwnow Spit)
The purpose of this paper is to demonstrate the usefulness of XBeach model (1D) in modelling changes of beach and dune morphology in terms of significant storm influence at sandy Dziwnow Spit area located in the non-tidal Baltic Sea, on the western part of the Polish coast. Research were carried out in the framework of the MICORE project (7th FP) the main goal of which was to develop an operational early warning system for coastal hazard based on the XBeach model. For model calibration, one significant storm event registered in 2009 was simulated and compared against pre- and post-storm morphological data consisting of geodetic measurement and airborne laser scanning data. XBeach model has been run for 8 cross-shore profiles with different configuration of model parameters. The model skill were tested on the base of statistical descriptor BSS for the terrestrial part of the profiles. The highest BSS values varied from 0.54 to 0.90 depending on the profile. The best performance of XBeach model for each profile was obtained by deactivating longwave stirring lws and keeping hmin parameter value to 0.05 in all simulations. Values of wetslp equalled 0.3 or 0.4 while dryslp were 1 or 1.5. The facua parameter values oscillated between 0.1 and 0.5. The results show that XBeach is reasonably modelling morphological changes like dune and beach erosion induced by storm event in Southern Baltic conditions and can be successfully applied to create an effective tool for hazard prediction.