Vulnerability Indicators for Coastal Dunes
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 129, Issue 6
Abstract
This paper describes the development of a new parameter to characterize dune vulnerability to storm-induced erosion. Existing indicators of dune erosion vulnerability are examined, including expected cross-sectional erosion values calculated using storm characteristics. We extract a series of 110 pre- and poststorm profiles at cross-shore transects, spaced at approximately 300 m alongshore on digital terrain models of a North Carolina barrier island. Dune failure and survival are designated based on a percentage of the cross-sectional area eroded—50% or greater erosion indicates failure, less than 50% erosion, survival. Crest height does not prove to be an effective predictor of dune vulnerability. Existing cross-sectional area based parameters show some success in predicting erosion vulnerability. We improve the dune failure and survival prediction success rate using a new parameter, a surrogate moment of inertia, the erosion resistance.
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Information & Authors
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 129 • Issue 6 • November 2003
Pages: 270 - 278
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Sep 4, 2002
Accepted: Apr 24, 2003
Published online: Oct 15, 2003
Published in print: Nov 2003
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