POST-STORM DUNE RECOVERY IN CAPE LOOKOUT NATIONAL SEASHORE, NC

  • Paige Hovenga
  • Peter Ruggiero
  • Nick Cohn
  • Sally Hacker
  • Katya Jay
  • Laura Moore
  • Michael Itzkin

Abstract

Coastal dunes are often the first and primary form of defense against destructive surge and waves that accompany extreme storm events. Beach grasses are known to affect dune height, width, and stability, contributing to the dune's ability to protect the hinterland from wave and flooding hazards (Hacker et al. 2012). However, the interaction and feedbacks between dune development and properties of beach grasses (e.g., species, density) is not fully understood. In particular, our knowledge of the ecomorphodynamic processes controlling the recovery of coastal dunes following storms and the long-term ability of dunes to adapt to changes in climate remains inadequate. The objective of this interdisciplinary research is to characterize the temporal and spatial variability of coastal foredune recovery following major storm events and the subsequent impact of this recovery on future vulnerability. The study region consists of three low-lying barrier islands within the Cape Lookout National Seashore (CALO) along the central coast of North Carolina. The 90 km stretch of coast exhibits spatial variability in dominant dune grass species, grass cover density, coast orientation, beach slope, and wave energy. Using physical and ecological field datasets and process-based numerical modeling, post-storm dune recovery is assessed following Hurricane Matthew (2016).

References

Duran and Moore (2013): Vegetation controls on the maximum size of coastal dunes. Proceedings of the National Academy of Sciences, pp. 17217-17222.

Hoonhout and de Vries (2016): A process-based model from aeolian sediment transport and spatiotemporal varying sediment availability. Journal of Geophysical Research: Earth's Surface, vol. 121, pp. 1555-1575.

Hacker, Zarnetske, Seabloom, Ruggiero, Mull, Gerrity, Jones (2012): Subtle differences in two non-native congeneric beach grasses significantly affect their colonization, spread, and impact. Oikos, vol. 121, pp. 138-148, doi:10.1111/j.1600-0706.2011.18887.x

Roelvink, Reniers, Van Dongeren, Vries, McCall, and Lescinski (2009): Modelling storm impacts on beaches, dunes, and barrier islands. Coastal Engineering, vol. 56, pp. 1133-1152.

Published
2018-12-30
How to Cite
Hovenga, P., Ruggiero, P., Cohn, N., Hacker, S., Jay, K., Moore, L., & Itzkin, M. (2018). POST-STORM DUNE RECOVERY IN CAPE LOOKOUT NATIONAL SEASHORE, NC. Coastal Engineering Proceedings, 1(36), sediment.40. https://doi.org/10.9753/icce.v36.sediment.40

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