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Current subsidence rates due to compaction of Holocene sediments in southern Louisiana

Geophysical Research Letters

By:
, ,
DOI: 10.1029/2006GL026300

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Abstract

Relative contributions of geologic and anthropogenic processes to subsidence of southern Louisiana are vigorously debated. Of these, shallow sediment compaction is often considered dominant, although this has never been directly observed or effectively demonstrated. Quantitative understanding of subsidence is important for predicting relative sea level rise, storm surge flooding due to hurricanes, and for successful wetland restoration. Despite many shallow borings, few appropriate stratigraphic and geotechnical data are available for site-specific calculations. We overcome this by determining present compaction rates from Monte Carlo simulations of the incremental sedimentation and compaction of stratigraphies typical of the Holocene of southern Louisiana. This approach generates distributions of present compaction rates that are not expected to exceed 5 mm/yr, but may locally. Locations with present subsidence rates greater than the predicted maximum probable shallow compaction rates are likely influenced by additional processes.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Current subsidence rates due to compaction of Holocene sediments in southern Louisiana
Series title:
Geophysical Research Letters
DOI:
10.1029/2006GL026300
Volume
33
Issue:
11
Year Published:
2006
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geophysical Research Letters