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Coastal vulnerability assessment of Dry Tortugas National Park (DRTO) to sea-level rise

Open-File Report 2004-1416

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Abstract

A coastal vulnerability index (CVI) was used to map the relative vulnerability of the coast to future sea-level rise within Dry Tortugas National Park in Florida. The CVI ranks the following in terms of their physical contribution to sea-level rise-related coastal change: geomorphology, regional coastal slope, rate of relative sea-level rise, historical shoreline change rates, mean tidal range and mean significant wave height. The rankings for each input variable were combined and an index value calculated for 1-minute grid cells covering the park. The CVI highlights those regions where the physical effects of sea-level rise might be the greatest. This approach combines the coastal system's susceptibility to change with its natural ability to adapt to changing environmental conditions, yielding a quantitative, although relative, measure of the park's natural vulnerability to the effects of sea-level rise. The CVI provides an objective technique for evaluation and long-term planning by scientists and park managers. Dry Tortugas National Park (DRTO) consists of relatively stable to washover-dominated portions of carbonate beach and man-made fortification. The areas within Dry Tortugas that are likely to be most vulnerable to sea-level rise are those with the highest rates of shoreline erosion and the highest wave energy.

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Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Coastal vulnerability assessment of Dry Tortugas National Park (DRTO) to sea-level rise
Series title:
Open-File Report
Series number:
2004-1416
Edition:
Online only
Year Published:
2005
Language:
English
Publisher:
U.S. Geological Survey
Description:
27 p.
Country:
United States
State:
Florida
Other Geospatial:
Dry Tortugas National Park
Scale:
5000000
Online Only (Y/N):
Y
Additional Online Files (Y/N):
N