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Coastal-change impacts during hurricane katrina: an overview

By:
, ,
DOI: 10.1061/40926(239)68

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Abstract

As part of an ongoing cooperative effort between USGS, NASA and USACE, the barrier islands within the right-front quadrant of Hurricane Katrina were surveyed with airborne lidar both before and after landfall. Dauphin Island, AL was located the farthest from landfall and wave runup intermittently overtopped its central and western sections. The Gulf-side of the island experienced severe erosion, leaving the first row of houses in the sea, while the bayside accreted. In contrast, the Chandeleur Islands, LA did not experience, this classic `rollover'. Rather, the island chain was completely stripped of sand, transforming a 40-km-long sandy island chain into a discontinuous series of muddy marsh islets. Models indicate that storm surge likely submerged the entire Chandeleur Island chain, at least during the latter part of the storm. The net result was destructive coastal change for the Chandeleur Islands, while Dauphin Island tended to maintain its form through landward migration.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Coastal-change impacts during hurricane katrina: an overview
ISBN:
0784409269; 9780784409268
DOI:
10.1061/40926(239)68
Year Published:
2007
Language:
English
Publisher:
American Society of Civil Engineers
Contributing office(s):
Coastal and Marine Geology Program
Description:
12 p.
First page:
888
Last page:
896
Number of Pages:
12
Conference Title:
6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes
Conference Location:
New Orleans, LA