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dc.contributor.authorRademacher, Max
dc.contributor.authorde Schipper, Matthieu A.
dc.contributor.authorSwinkels, Cilia
dc.contributor.authorMacMahan, Jamie H.
dc.contributor.authorReniers, Ad J.H.M.
dc.date.accessioned2017-02-28T18:21:24Z
dc.date.available2017-02-28T18:21:24Z
dc.date.issued2017-01
dc.identifier.citationM. Radermacher, M.A. de Schipper, C. Swinkels, J.H. MacMahan, A.J.H.M. Reniers, "Tidal flow separation at protruding beach nourishments," Journal of Geophysical Research: Oceans, v.122, (2017), 63-79.en_US
dc.identifier.urihttp://hdl.handle.net/10945/51954
dc.descriptionThe article of record as published may be found at http://dx.doi.org/10.1002/2016JC011942en_US
dc.description.abstractIn recent years, the application of large-scale beach nourishments has been discussed, with the Sand Motor in the Netherlands as the first real-world example. Such protruding beach nourishments have an impact on tidal currents, potentially leading to tidal flow separation and the generation of tidal eddies of length scales larger than the nourishment itself. The present study examines the characteristics of the tidal flow field around protruding beach nourishments under varying nourishment geometry and tidal conditions, based on extensive field observations and numerical flow simulations. Observations of the flow field around the Sand Motor, obtained with a ship-mounted current profiler and a set of fixed current profilers, show that a tidal eddy develops along the northern edge of the mega-nourishment every flood period. The eddy is generated around peak tidal flow and gradually gains size and strength, growing much larger than the cross-shore dimension of the coastline perturbation. Based on a 3 week measurement period, it is shown that the intensity of the eddy modulates with the spring-neap tidal cycle. Depth-averaged tidal currents around coastline perturbations are simulated and compared to the field observations. The occurrence and behavior of tidal eddies is derived for a large set of simulations with varying nourishment size and shape. Results show that several different types of behavior exist, characterized by different combinations of the nourishment aspect ratio, the size of the nourishment relative to the tidal excursion length, and the influence of bed friction.en_US
dc.description.sponsorshipSTW granten_US
dc.description.sponsorshipERC-Advanced Granten_US
dc.format.extent17 p.en_US
dc.publisherAmerican Geophysical Unionen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleTidal flow separation at protruding beach nourishmentsen_US
dc.typeArticleen_US
dc.contributor.corporateNaval Postgraduate School (U.S.)en_US
dc.contributor.departmentOceanographyen_US
dc.description.funderSTW Grant no. 12686: Nature-driven nourishments of coastal systems (NatureCoast), S1: Coastal Safetyen_US
dc.description.funderERC-Advanced Grant no. 291206 - Nearshore Monitoring and Modeling (NEMO)en_US


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