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Implications of accelerated sea-level rise on Louisiana coastal environments

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Abstract

Natural and human-induced processes have combined to produce high rates of relative sea-level rise and coastal land loss in Louisiana. This paper presents historical trends in sea-level rise and the implication of predicted accelerated rise scenarios on Louisiana's coastal environments. Mean eustatic sea-level in the Gulf of Mexico is 0.23 cm/yr. In Louisiana, relative sea-level rise, which combines eustacy and subsidence, averages from 0.50 cm/yr in the chenier plain to 1.0 cm/yr in the delta plain. Subsidence due to the compaction of Holocene sediments is believed to be the major component influencing these high rates of rise. Subsidence contributes up to 80% of the observed relative sea-level rise in coastal Louisiana. The Environmental Protection Agency (EPA) predicts the rate of sea-level rise to increase over the next century due to global climate change. If these predictions are accurate, a dramatic increase in the coastal land loss conditions in Louisiana can be expected.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Implications of accelerated sea-level rise on Louisiana coastal environments
ISBN:
0872628086
Year Published:
1991
Language:
English
Publisher:
Publ by ASCE
Publisher location:
New York, NY, United States
Larger Work Title:
Coastal Sediments '91; Volume 2
First page:
1207
Last page:
1222
Number of Pages:
16
Conference Title:
Proceedings of a Specialty Conference on Quantitative Approaches to Coastal Sediment Processes
Conference Location:
Seattle, WA, USA
Conference Date:
25 June 1991 through 27 June 1991