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Bathymetric comparisons adjacent to the Louisiana barrier islands: Processes of large-scale change

Journal of Coastal Research

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Abstract

This paper summarizes the results of a comparative bathymetric study encompassing 150 km of the Louisiana barrier-island coast. Bathymetric data surrounding the islands and extending to 12 m water depth were processed from three survey periods: the 1880s, the 1930s, and the 1980s. Digital comparisons between surveys show large-scale, coherent patterns of sea-floor erosion and accretion related to the rapid erosion and disintegration of the islands. Analysis of the sea-floor data reveals two primary processes driving this change: massive longshore transport, in the littoral zone and at shoreface depths; and increased sediment storage in ebb-tidal deltas. Relative sea-level rise, although extraordinarily high in the study area, is shown to be an indirect factor in causing the area's rapid shoreline retreat rates.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Bathymetric comparisons adjacent to the Louisiana barrier islands: Processes of large-scale change
Series title:
Journal of Coastal Research
Volume
13
Issue:
3
Year Published:
1997
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Coastal Research
First page:
670
Last page:
678
Number of Pages:
9