Results

Figure 11. Relative Coastal Vulnerability for Virgin Islands National Park. Click on figure for larger image.

The CVI values calculated for Virgin Islands range from 4.47 to 12.25. The mean CVI value is 8.01; the mode and the median are 7.75. The standard deviation is 1.86. The 25th, 50th, and 75th percentiles are 6.5, 7.8 and 9.0, respectively.

Figure 11 shows a map of the coastal vulnerability index for Virgin Islands National Park. The CVI scores are divided into low, moderate, high, and very high-vulnerability categories based on the quartile ranges and visual inspection of the data. CVI values below 6.5 are assigned to the low vulnerability category. Values from 6.5 to 7.8 are considered moderate vulnerability. High-vulnerability values lie between 7.81 and 9.0. CVI values above 9.0 are classified as very high vulnerability. Figure 12 shows the percentage of Virgin Islands

Figure 12. Percentage of Virgin Islands shoreline in each CVI category. Click on figure for larger image.

shoreline in each vulnerability category. Nearly all of the shoreline of St. John is evaluated for the Virgin Islands National Park. Thirteen percent of the mapped shoreline is classified as being at very high vulnerability due to future sea-level rise. Twenty-nine percent is classified as high vulnerability, twenty-eight percent as moderate vulnerability, and twenty-nine percent as low vulnerability.