基于GIS的西宁市生态敏感性分析

Ecological Sensitivity Analysis of Xining City Based on GIS

国土优化开发和土地集约型利用是生态文明建设的重要一环,生态敏感性分析为优化国土空间和土地的开发利用提供参考基础,也可促进区域生态环境的可持续发展。借助GIS技术,选取高程、坡度、水域、NDVI和土地利用类型5个生态敏感性因子,利用层次分析法(AHP)确定因子权重,采用空间叠加分析对生态敏感度定量分析,将所得到的生态敏感的高低分为高度敏感区、中度敏感区、低度敏感区和非敏感区,对各个生态敏感区进行综合分析,得到西宁市单因子和综合生态敏感性分析结果,并对西宁城市群的开发提出分区保护与建设的对策建议。

The optimization of land space development and land intensive utilization is an important part of the construction of ecological civilization. Ecological sensitivity analysis can provide a reference basis for optimizing land space and land development and utilization,and also can promote the sustainable development of regional ecological environment. By using GIS technology,selection of elevation,slope and land use types,water and other vegetation cover index 5 ecological sensitive factors,using the analytic hierarchy process（ AHP） to determine the weight factor,using spatial overlay analysis on the ecological sensitivity analysis for quantitative,highly sensitive area,moderate sensitive area,low sensitive areas and non sensitive area the ecological sensitive level. Based on the comprehensive analysis of ecological sensitive areas,the results of single factor and comprehensive ecological sensitivity analysis of Xining City were obtained,and the countermeasures of subarea protection and construction were put forward for the development of Xining urban agglomeration.