Application of Coastal Vunerability Index (CVI) on the Island of Oahu
Date
2017
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Abstract
Coastal vulnerability index (CVI) was used to identify and map the vulnerable
coastline of Oahu from sea-level rise risks. Vulnerability is the resources at risk from
coastal hazards. Sea level rise pose many complications such as loss of land to many
coastal communities, especially on islands, such as Oahu. The purpose of this study is to
identify the highly vulnerable areas on the island of Oahu, evaluate the vulnerability of
Oahu based on the geomorphology without habitats, and provide a reference for
adaptation options to overcome sea level rise in coastal management practices for Sunset
Beach, HI. The particular CVI method used was Hammar-Klose and Thieler (2001) that
the Natural Capital Project's InVEST toolkit (InVEST Coastal Vulnerability version
3.3.2) (InVEST, 2016) software incorporates to analyze the biological and physical
environmental inputs of the region to give a spatial mapping of vulnerable areas. Major
vulnerable areas are found in the northern shore regions, the western coast, southwest
shore, and the southeastern tip. On account of the information for cost benefit analysis at
Sunset Beach, we chose this area as a case study. In the Sunset Beach region, factors
including high wave exposures, surge potential, geomorphologic features such as sandy
beaches, and sea level rise make this area among the most vulnerable. Several adaptation
options are available for Sunset Beach, and conducting a cost-benefit analysis can aid to
identify the best management practice for decision-makers. This study can contribute
toward coastal zone management in areas that have little to no data information that can
assist decision-makers in finding vulnerable areas to concentrate on and aid in the best
adaptations options for vulnerable areas similar to Sunset Beach.
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sea level rise, physical oceanography
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82 pages
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