Potential Future Land Loss of Small Islands of Puerto Rico and the United States Virgin Islands. David M. Bush William J. Neal Pablo Llerandi-Román Chester W. Jackson, Jr. Tasks. Coastal Recession Slope/retreat (Bruun Rule) Extrapolation of historical shoreline change
David M. Bush
William J. Neal
Chester W. Jackson, Jr.
MODIFICATION OF and the United States Virgin IslandsCoastal Vulnerability Index (CVI)
The above parameters are utilized in the analysis of mid-Atlantic barrier islands (Pendleton et. al, 2004). For Puerto Rico, different controls influence the stability and configuration of the shoreline (such as differences in wave, wind, and storm activity). Upon completion of detailed field mapping, a revised version of the CVI will be proposed which incorporates the use of more appropriate coastal variables for hazard assessment in the Caribbean.
Cayo and the United States Virgin IslandsRatones
Arecife Media Luna
1 and the United States Virgin Islands. Cayo Ratones, 2. Media Luna Reef
Cayo and the United States Virgin IslandsRatones about 100 × 50 meters, surrounded by patchy reef. Beach sediment is calcareous, dominated by Halimeda. Plants include palm trees, mangroves, and non-native Australian pine trees. Accretion is occurring along the eastern and western portions of the island. The northern side is more exposed to wave and wind erosion. Mangroves have been planted. Rock walls are present along the eastern side. The island is used recreationally and reflects a high level of human impact.
South-facing view of Cayo Ratones. Note the dense vegetation.
Cayo Ratones, view toward the southwest. Main island of Puerto Rico visible in the background. Note pier, also shown above .
Cayo Ratones, opposing view of photo to left , showing the accreting shoreline.
Luna and the United States Virgin IslandsII beach, western side. Notice bolder size sediment.
Media Luna I & II
Luna I. Coarse-grain beach sediment deposits indicate moderate storm wave activity.
DEM and the United States Virgin IslandsModel
A digital elevation model (DEM) of Media Luna (below, left) was made from the RTK data.
3-D model of Luna II
View of Luna II taken from Luna I