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基于海岛地质灾害风险评价指标体系,采用模糊数学法,以长兴岛为例,对地质灾害风险进行综合评价。评价结果表明:长兴岛的高风险区域面积占全岛面积的9.95%,中风险区占14.00%,低风险区为76.05%。高、中风险区除了大片的集中分布外,还呈现出斑块状零散分布,这主要是长兴岛地质环境地域性与社会因素差异性结合的结果。
Based on the index system of geological hazard risk assessment of the island, fuzzy mathematics is used to take Changxing Island as an example to evaluate the risk of geological disasters comprehensively. The evaluation results show that the area of high risk area in Changxing Island accounts for 9.95% of the total area of the island, the middle risk area accounts for 14.00% and the low risk area is 76.05%. In addition to the large-scale distribution of high-risk and medium-risk areas, patchy patches are also scattered, which is mainly the result of the regional and social differences in the geological environment of Changxing Island.