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Barrier island vulnerability to breaching: a case study on Dauphin Island, Alabama

By:
,
DOI: 10.1061/40926(239)157

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Abstract

Breaching of barrier islands can adversely impact society by severing infrastructure, destroying private properties, and altering water quality in back bays and estuaries. This study provides a scheme that assesses the relative vulnerability of a barrier island to breach during storms. Dauphin Island, Alabama was selected for this study because it has a well documented history of island breaches and extensive geological and geomorphic data. To assess the vulnerability of the island, we defined several variables contributing to the risk of breaching: island geology, breaching history, and island topography and geomorphology. These variables were combined to form a breaching index (BI) value for cross island computational bins, each bin every 50 m in the alongshore direction. Results suggest the eastern section of Dauphin Island has the lowest risk of breaching with the remaining portion of the island having a moderate to high risk of breaching. Two reaches in the western section of the island were found to be particularly vulnerable due primarily to their minimal cross-sectional dimensions.

Geospatial Extents

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Barrier island vulnerability to breaching: a case study on Dauphin Island, Alabama
ISBN:
0784409269; 9780784409268
DOI:
10.1061/40926(239)157
Year Published:
2007
Language:
English
Publisher:
American Society of Civil Engineers
Contributing office(s):
Coastal and Marine Geology Program
Description:
9 p.
Larger Work Type:
Book
Larger Work Subtype:
Conference publication
First page:
2002
Last page:
2010
Number of Pages:
9
Conference Title:
6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes
Conference Location:
New Orleans, LA
Country:
United States
State:
Alabama
Other Geospatial:
Dauphin Island