Cited by 5Coastal and Marine DynamicsAeolian processes and effectsHydrology and Sediment Transport Processes

Exploring the bio-geomorphological evolution of mega nourishments with a cellular automata model

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Teixeira, Manuel, Horstman, Erik M., Wijnberg, Kathelijne M.·2024·Geomorphology

Abstract

Mega nourishments are innovative Nature-based Solutions to protect against coastal erosion and flooding. By upscaling the volume of sand nourishments, mega nourishments enhance coastal safety while creating new space for recreation and nature development. The application of such large nourishment volumes can significantly alter natural beach-dune morphology, with an unclear effect on the long-term evolution of the beach-dune system. The DuBeVeg model, a bio-geomorphological Cellular Automata model, was extended to incorporate the typical surface armouring and longshore coastline development of mega nourishments. The extended model was successfully validated with morphodynamic data from the Sand Motor mega nourishment and was used to explore the long-term dune development of idealized bell-shaped mega nourishments. Over a 50-year time span, the typically artificially high and wide beach of a mega nourishment resulted in the seaward expansion of the foredune zone whilst a more natural, lower beach elevation resulted in a greater volume of the foredune zone in the long-term. A faster diffusion of the initially bell-shaped mega nourishment gave rise to a lesser advance and a more alongshore-uniform width of the foredune zone. Furthermore, the armour layer that develops when the nourishment material is less well-sorted and coarser than native beach sand, led to the emergence of more scattered and isolated dunes compared to a nourishment with native beach sand. These model results…

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Crossref · 10.1016/j.geomorph.2024.109371

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Authors
Teixeira, M., Horstman, E. M., & Wijnberg, K. M.
Affiliations
University of Twente (NL)
Corresponding author
Teixeira, Manuel
Venue
Geomorphology
Publisher
Elsevier BV
Published
2024-10
Volume
463
Pages
109371
ISSN
0169-555X (ISSN-L)
OpenAlex
W4401236759
Cited by
4
References
58
Citations by year
2026: 3 · 2025: 1
FWCI
1.08
Type
journal article
Language
en
Open access
Locations
  • Geomorphology (publishedVersion, cc-by)
  • University of Twente Research Information (publishedVersion, cc-by)
Funders
NWO ENW
Topics
  • Physical Sciences › Earth and Planetary Sciences › Earth-Surface Processes › Coastal and Marine Dynamics
  • Physical Sciences › Earth and Planetary Sciences › Earth-Surface Processes › Aeolian processes and effects
  • Physical Sciences › Environmental Science › Ecology › Hydrology and Sediment Transport Processes
Keywords
mega-nourishment, beach nourishment, cellular automata model, nature-based solutions, coastal erosion, Sand Motor

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