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Mapping Barrier Island Changes in Louisiana: Techniques, Accuracy, and Results

by Randolph A. McBride, Louisiana State Univ, Baton Rouge, United States,
Matteson W. Hiland, Louisiana State Univ, Baton Rouge, United States,
Shea Penland, Louisiana State Univ, Baton Rouge, United States,
S. Jeffress Williams, Louisiana State Univ, Baton Rouge, United States,
Mark R. Byrnes, Louisiana State Univ, Baton Rouge, United States,
Karen A. Westphal, Louisiana State Univ, Baton Rouge, United States,
Bruce E. Jaffe, Louisiana State Univ, Baton Rouge, United States,
Asbury H. Sallenger, Jr., Louisiana State Univ, Baton Rouge, United States,



Document Type: Proceeding Paper

Part of: Coastal Sediments

Abstract:

Changes in shoreline position along Louisiana's rapidly changing barrier coastline were compiled using cartographic data sources and aerial photography from 1855 to 1989. An interactive computer mapping system was employed to compile and to quantify shoreline data at about 880 shore-normal transects, which are presented in terms of magnitude, direction, and rate of change. Based on this comprehensive data set, two types of barrier island evolution are identified 1) landward rollover, and 2) in-place breakup.

Subject Headings: Mapping | Barrier islands | Islands | Shores | Shoreline protection | Aerial photography | Interactive systems | Louisiana | United States

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