Print Email Facebook Twitter Morphological behavior of a non-equilibrium coastal profile: The response of the Maasvlakte-2 outer contour to a storm event Title Morphological behavior of a non-equilibrium coastal profile: The response of the Maasvlakte-2 outer contour to a storm event Author França de Abreu, C. Contributor Stive, M.J.F. (mentor) Jacbos, W. (mentor) Van Thiel de Vries, J.S.M. (mentor) De Schipper, M.A. (mentor) Nipius, K.G. (mentor) Faculty Civil Engineering and Geosciences Department Hydraulic Engineering Programme CoMEM - Coastal and Marine Engineering and Management Date 2010-06-25 Abstract The objective of this study is to analyze and simulate the behavior of a non-equilibrium profile in a storm event, in particular, the Maasvlakte-2 (MV2). The MV2 is a large reclamation project at which both soft and hard sea-defenses are applied. Soft sea-defenses exhibit steep initial profiles during construction. Understanding how this sea-defense behaves under storm conditions is important to predict its stability and to optimize its construction scheme. There is little information available on the behavior of non-equilibrium profiles. Therefore the availability of the XBeach model, in combination storm data from the MV2, provides a unique possibility to obtain more insight in the morphological behavior of non-equilibrium profiles. Steep cross-shore profiles tend to be highly dynamic and are not in equilibrium. Most models which predict the behavior of sandy coasts are based on empirical relations derived from data of equilibrium profiles. Storms, however, exhibit a relatively small temporal scale, which implies that these empirical models are generally unsuitable to predict the response of a profile during storm events. With this in mind and in order to approach the objective, a thorough data analysis was done. From the data analysis the main cross-shore and longshore morphological processes were identified and a profile analysis, and mass balance of the soft structure was carried out. The information obtained from this was used to compare with the results of commonly used empirical and semi-empirical engineering tools. And also used as input for the processed-based simulation (XBeach), and for the comparison with its results. A net loss in sediment was observed from the outer contour boundaries due to longshore transport but not sediment is lots offshore from the cross-shore profile. The upper profile suffered greatly from the storm, presenting very large erosion volumes in a small-time scale. Due to the assumptions based on pre-storm equilibrium profile conditions made by the semi-empirical, their application yielded results that were difficult to compare to the results of the data analysis. In general, the approaches underestimated the response of the steep non-equilibrium profile. The 1DV simulations of the process-based model however, represented the cross-shore profile response rather well. Its comparison with the post-storm data analysis, demonstrated though that there is a need for a 2DH or 3D simulations, due to the large variability in shoreline orientation, elevation and steepness of the profile alongshore. Subject morphodynamicsnon-equilibrium profilecoastalMaasvlakte-2 To reference this document use: http://resolver.tudelft.nl/uuid:f4b04e94-f45c-458b-b6c7-bd6ae2301deb Part of collection Student theses Document type master thesis Rights (c) 2010 França de Abreu, C. Files PDF Thesis_Final_CAbreu.pdf 4.08 MB Close viewer /islandora/object/uuid:f4b04e94-f45c-458b-b6c7-bd6ae2301deb/datastream/OBJ/view