基于GIS的桂林市区生态敏感性分析

GIS-Based Ecological Sensitivity Analysis in Guilin City

以桂林市区的生态敏感性问题为研究对象,选取坡度、高程、水域、植被覆盖指数(NDVI)、土地利用类型5个敏感性因子,利用层次分析法(AHP)确定敏感性因子权重,结合GIS空间分析技术,得到桂林市区生态敏感性的空间分布。结果表明,桂林市区生态敏感性总体较高,区域差异比较明显;高度敏感区、中度敏感区、低度敏感区和不敏感区分别占研究区总面积的16.7%、31.0%、27.8%和24.5%。对桂林市区生态敏感性进行分析,并提出分区保护与建设的建议,为桂林市区生态环境保护和产业经济布局提供参考。

Taking the ecological sensitive problems of Guilin city as a research object,five ecological sensitive factors,including slope degree,elevation,water body,NDVI and land use type were selected,and their weights were determined by analytic hierarchy process(AHP),then combining with GIS spatial analysis technique,the spatial distribution of comprehensive ecological sensitivity of Guilin city was obtained.The results showed that the ecological sensitivity of Guilin city was generally higher and regional differences were comparatively obvious;the highly sensitive areas,moderately sensitive areas,low sensitive areas,insensitive areas occupied 16.7%,31.0%,27.8% and 24.5% of total areas studied respectively.In order to provide scientific references for the environment protection and industry distribution,ecological sensitivity in Guilin city was analyzed,advices,countermeasures for different zones were put forward.