基于GIS的海南省乐东黎族自治县生态敏感性评价

GIS-Based Ecological Sensitivity Evaluation of Ledong Li Autonomous County of Hainan Province

以海南省乐东黎族自治县为研究对象,依据乐东独特的生态环境问题和相关生态敏感性研究,建立乐东县生态敏感性指标体系,采用层次分析法和GIS,对乐东县进行生态敏感性评价。结果表明:乐东县整体生态敏感性偏高,东部、北部地区高于西部、南部地区。其中高度敏感区和极敏感区占全县总面积的53.85%,中度敏感区域占总面积的21.00%,轻度敏感区和不敏感区占总面积的25.15%。依据生态敏感性综合评价结果将乐东县划分为3个生态功能区。

Based on the specific local eco-environmental problems and the corresponding research achievements on ecological sensitivity of Ledong Li Autonomous County,Hainan Province,the eco-sensitivity index system of Le-dong County was established,and the ecological sensitivity assessment for this county was conducted by means of applying AHP method and GIS technology.The results showed that Ledong County was generally a high eco-sensi-tive county,the eco-sensitivity in the east and north parts of the county was higher than that of the west and south parts.The area with the extremely high and high eco-sensitivity accounted for 53.85% of the total area in the coun-ty,the area with moderate eco-sensitivity and the area with low and no eco-sensitivity in Ledong County took 21.00%and 25.15% of the total area respectively.The Ledong County was divided into three ecological function areas according to the results of the ecological sensitivity assessment.