Coastal Vulnerability Index (CVI) Assessment for the National Park of American Samoa (npsa_shore)

A coastal vulnerability index (CVI) was used to map the relative vulnerability of the coast to future sea-level rise within The National Park of American Samoa . The CVI ranks the following in terms of their physical contribution to sea-level rise-related coastal change: geomorphology, regional coastal slope, rate of relative sea-level rise, historical shoreline change rates, mean tidal range and mean significant wave height. The rankings for each input variable were combined and an index value calculated for 500-meter grid cells covering the park. The CVI highlights those regions where the physical effects of sea-level rise might be the greatest. This approach combines the coastal system's susceptibility to change with its natural ability to adapt to changing environmental conditions, yielding a quantitative, although relative, measure of the park's natural vulnerability to the effects of sea-level rise. The CVI and the data contained within this dataset provide an objective technique for evaluation and long-term planning by scientists and park managers.本数据集采用海岸脆弱性指数（Coastal Vulnerability Index, CVI），针对美属萨摩亚国家公园范围内海岸应对未来海平面上升的相对脆弱性开展制图。该指数基于各要素对海平面上升引发的海岸变化的物理贡献程度，对以下指标进行等级评定：地貌、区域海岸坡度、相对海平面上升速率、历史海岸线变化速率、平均潮差与平均有效波高。将各输入变量的等级评分进行融合，并为覆盖整个公园的500米网格单元计算对应的指数值。海岸脆弱性指数可识别出海平面上升物理影响可能最为显著的区域。本方法将海岸系统的变化易感性与其适应环境变化的自然能力相结合，生成了一种量化（尽管为相对量化）的公园应对海平面上升影响的自然脆弱性评估指标。本数据集包含的海岸脆弱性指数及相关数据，可为科研人员与公园管理者提供一套用于评估与长期规划的客观技术方法。