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Coastal-change impacts during hurricane katrina: an overview

January 1, 2007

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.

Publication Year 2007
Title Coastal-change impacts during hurricane katrina: an overview
DOI 10.1061/40926(239)68
Authors Asbury Sallenger, C. Wayne Wright, Jeff Lillycrop
Publication Type Conference Paper
Publication Subtype Conference Paper
Index ID 70030026
Record Source USGS Publications Warehouse
USGS Organization Coastal and Marine Geology Program