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Coastal Vulnerability Assessment of Dry Tortugas National Park (DRTO) to Sea-Level Rise
USGS Open-File Report 2004-1416

Map of Coastal Vulnerability

Skip past contents informationTable of Contents link to Title Page Link to Abstract Page Link to Introduction Page Link to Data Ranking Page Link to Dry Tortugas National Park Page Link to Methology Page Link to Geologic Variables Page Link to Physical Process Variables Page Link to Calculating the Vulnerability Index Page Link to Results Page Link to Discussion Page Link to Conclusions Page Link to References Page


The coastal vulnerability index (CVI) provides insight into the relative potential of coastal change due to future sea-level rise. The maps and data presented here can be viewed in at least two ways:

  1. as indicators of where physical changes are most likely to occur as sea level continues to rise; and

  2. as planning tools for the Dry Tortugas National Park.

As ranked in this study, geomorphology, historical rates of shoreline change, and significant wave height and are the most important variables in determining the spatial variability of the CVI for Dry Tortugas. Regional coastal slope, tidal range, and sea-level rise rate do not contribute to the spatial variability in the coastal vulnerability index.

Dry Tortugas National Park preserves a dynamic natural environment, which must be understood in order to be managed properly. The CVI is one way that park managers can assess objectively the natural factors that contribute to the evolution of the coastal zone, and thus how the park may evolve in the future.

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