RESULTS

Figure 12. Relative Coastal Vulnerability for Olympic National Park.

The calculated CVI values for Olympic National Park range from 4.24 to 12.25. The mean CVI value is 8.23; the mode is 10.95; and the median is 8.49. The standard deviation is 1.1. The 25th, 50th, and 75th percentiles are 6.5, 8.0, and 9.5, respectively.

Figure 12 shows a map of the coastal vulnerability index for the Olympic 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 - 8.0 are considered moderate vulnerability. High-vulnerability values lie between 8.1 and 9.5. CVI values above 9.5 are classified as very high vulnerability. Figure 13 shows a histogram of the percentage of Olympic National Park shoreline in each vulnerability category. A total of 55 km (32 miles) of shoreline is evaluated along the national seashore. Of this total, 30 percent of the

Figure 13. Percentage of Olympic National Park shoreline in each CVI category.

mapped shoreline is classified as being at very high vulnerability due to future sea-level rise. Twenty-four percent is classified as high vulnerability, 22 percent as moderate vulnerability, and 24 percent as low vulnerability.