Print Email Facebook Twitter Morphological modelling of strongly curved islands Title Morphological modelling of strongly curved islands Author Roelvink, D. Den Heijer, C. Van Thiel De Vries, J.S.M. Faculty Civil Engineering and Geosciences Department Hydraulic Engineering Date 2013-06-24 Abstract Land reclamations and island coasts often involve strongly curved shorelines, which are challenging to be properly modeled by numerical morphological models. Evaluation of the long term development of these types of coasts as well as their response to storm conditions requires proper representation of the governing physical processes. Not all types of numerical models are equipped to represent an entire island and allow waves from any direction. In this paper we demonstrate XBeach’s capabilities of plying a curvilinear grid around a small-scale circular island and exchanging model variables between the lateral boundaries by the recently implemented cyclic boundaries. The small-scale physical model tests by Kamphuis and Nairn (1984) were modeled with XBeach using both the stationary and the nonhydrostatic wave model on a rectangular as well as a curvilinear grid. The wing-bars that typically develop in Kamphuis’ tests are represented in the model, albeit that the angle of the bars is different. In a different XBeach model series, we investigate the behaviour of a larger scale curved coastline model under extreme storm conditions, for varying coastal radius. The results show that maximum erosion occurs at the locations where the incident wave direction is under an angle of 45 degrees with the coastline, and the coastal radius is of secondary importance. Subject islandmorphologymodelinglongshore transportcurved coastsXBeach To reference this document use: http://resolver.tudelft.nl/uuid:e29f82d4-6c7e-4b5c-a8db-11afbc57c8c9 Publisher Bordeaux University Source Coastal Dynamics 2013: 7th International Conference on Coastal Dynamics, Arcachon, France, 24-28 June 2013 Part of collection Institutional Repository Document type conference paper Rights (c) 2013 The Author(s) Files PDF 297528.pdf 3.95 MB Close viewer /islandora/object/uuid:e29f82d4-6c7e-4b5c-a8db-11afbc57c8c9/datastream/OBJ/view