Print Email Facebook Twitter Morphological Development of a Mega-Nourishment: First Observations at the Sand Engine Title Morphological Development of a Mega-Nourishment: First Observations at the Sand Engine Author De Schipper, M.A. De Vries, S. Stive, M.J.F. De Zeeuw, R.C. Rutten, J. Ruessink, B.G. Aarninkhof, S.G.J. Van Gelder-Maas, C. Faculty Civil Engineering and Geosciences Department Hydraulic Engineering Date 2014-06-15 Abstract Large (mega-scale) nourishments have been proposed as a promising alternative for traditional beach and shoreface nourishments, especially for locations with large structural erosion and sufficient sediment to dredge. This paper examines the initial bathymetric evolution of the Sand Engine, a mega-nourishment of 17 million m3 protruding almost 1 km seaward from its surrounding coast. Topographic surveys show that, despite the blunt initial shape of the nourishment, the sediment is reworked into a nearly symmetrical (bell curve like) shape in less than 1.5 years. The cross-shore extent decreased by 150 m in this period which is a reduction of 15 % of its original extent. Simultaneously, the alongshore size of the nourishment increased by 60 % as the sediment is redistributed to the adjacent coasts. This is also reflected in the large 1.6 million m3 loss of sediment on the peninsula. Almost 70 % of this volume is found to accrete in adjacent coastal sections. Although not all sediment loss from the peninsula could be relocated, the findings reveal that the Sand Engine mega nourishment is feeding its surrounding coast substantially. Subject feeder nourishmentmega nourishmentcoastal safetysediment transportsand engineSand MotorICCE 2014 To reference this document use: http://resolver.tudelft.nl/uuid:92fb037f-6e77-4bf1-b538-fcb88377c6c4 Publisher Coastal Engineering Research Council ISBN 978-0-9896611-2-6 Source ICCE 2014: Proceedings of 34th International Conference on Coastal Engineering, Seoul, Korea, 15-20 June 2014 Part of collection Institutional Repository Document type conference paper Rights (c) 2014 The Author(s) Files PDF 7797-31425-1-PB.pdf 648.71 KB Close viewer /islandora/object/uuid:92fb037f-6e77-4bf1-b538-fcb88377c6c4/datastream/OBJ/view