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J. Mar. Sci. Eng. 2019, 7(1), 13; https://doi.org/10.3390/jmse7010013

Exploring Marine and Aeolian Controls on Coastal Foredune Growth Using a Coupled Numerical Model

1
College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331, USA
2
Deltares, 2629HV Delft, The Netherlands
3
Faculty of Civil Engineering and Geosciences, Technical University of Delft, 2628CN Delft, The Netherlands
4
Department of Geological Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
5
Department of Ocean Engineering, Texas A&M University, College Station, TX 77843, USA
Current address: U.S. Army Engineer Research and Development Center, Coastal and Hydraulics Laboratory—Field Research Facility, Duck, NC, USA.
Current address: Van Oord, Rotterdam, The Netherlands.
*
Author to whom correspondence should be addressed.
Academic Editors: Gerben Ruessink and Christian Schwarz
Received: 1 December 2018 / Revised: 21 December 2018 / Accepted: 4 January 2019 / Published: 11 January 2019
(This article belongs to the Special Issue Coastal Dune Dynamics and Management)
Full-Text   |   PDF [14992 KB, uploaded 11 January 2019]   |  

Abstract

Coastal landscape change represents aggregated sediment transport gradients from spatially and temporally variable marine and aeolian forces. Numerous tools exist that independently simulate subaqueous and subaerial coastal profile change in response to these physical forces on a range of time scales. In this capacity, coastal foredunes have been treated primarily as wind-driven features. However, there are several marine controls on coastal foredune growth, such as sediment supply and moisture effects on aeolian processes. To improve understanding of interactions across the land-sea interface, here the development of the new Windsurf-coupled numerical modeling framework is presented. Windsurf couples standalone subaqueous and subaerial coastal change models to simulate the co-evolution of the coastal zone in response to both marine and aeolian processes. Windsurf is applied to a progradational, dissipative coastal system in Washington, USA, demonstrating the ability of the model framework to simulate sediment exchanges between the nearshore, beach, and dune for a one-year period. Windsurf simulations generally reproduce observed cycles of seasonal beach progradation and retreat, as well as dune growth, with reasonable skill. Exploratory model simulations are used to further explore the implications of environmental forcing variability on annual-scale coastal profile evolution. The findings of this work support the hypothesis that there are both direct and indirect oceanographic and meteorological controls on coastal foredune progradation, with this new modeling tool providing a new means of exploring complex morphodynamic feedback mechanisms. View Full-Text
Keywords: beach; progradation; morphodynamics; XBeach; Aeolis; Coastal Dune Model beach; progradation; morphodynamics; XBeach; Aeolis; Coastal Dune Model
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Cohn, N.; Hoonhout, B.M.; Goldstein, E.B.; De Vries, S.; Moore, L.J.; Durán Vinent, O.; Ruggiero, P. Exploring Marine and Aeolian Controls on Coastal Foredune Growth Using a Coupled Numerical Model. J. Mar. Sci. Eng. 2019, 7, 13.

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