GIS-BASED ANALYSIS OF STORM VULNERABILITY CHANGE AT PEA ISLAND, NC
No. 33 (2012), Coastal Management, Environment, and Risk
No. 33 (2012)

GIS-BASED ANALYSIS OF STORM VULNERABILITY CHANGE AT PEA ISLAND, NC

Coastal Management, Environment, and Risk
https://doi.org/10.9753/icce.v33.management.75
Published 2012-12-15
Eric Hardin
North Carolina State University
Helena Mitasova
North Carolina State University
Margery Overton
North Carolina State University
ICCE 2012 Cover Image
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Keywords

automated feature extraction
LiDAR
GRASS GIS
coastal dunes
barrier islands

How to Cite

Hardin, E., Mitasova, H., & Overton, M. (2012). GIS-BASED ANALYSIS OF STORM VULNERABILITY CHANGE AT PEA ISLAND, NC. Coastal Engineering Proceedings, 1(33), management.75. https://doi.org/10.9753/icce.v33.management.75
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Abstract

In August 2011, Hurricane Irene opened multiple small breaches along the Outer Banks of North Carolina, USA. To predict storm damage to barrier islands, the United States Geological Survey (USGS) has developed the storm impact scale for barrier islands, which assesses vulnerability based on the configuration of the pre-storm terrain relative to storm characteristics. We present the vulnerability of Pea Island to Hurricane Isabel (2003) and Irene (2011) using an efficient GIS-based implementation of the storm impact scale. This implementation employs a least cost path approach to automated topographic feature extraction and a remote sensing approach to wrack line extraction for storm parameter estimation. The assessed vulnerability along with high-resolution topographic visualizations based on a decadal time-series of Light Detection and Ranging (LiDAR) data suggest that the location of the breach formation was a function of the pre-storm terrain. With the presented methodology, the geospatial information required to identify vulnerable areas can efficiently be extracted so that management strategies can be implemented before storm damage occurs.
https://doi.org/10.9753/icce.v33.management.75
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