基于RS和GIS的贵阳市花溪区生态敏感性分析

Ecological Sensitivity Analysis of Huaxi District of Guiyang City Based on RS and GIS

生态敏感性指在外界干扰下,通过区域内环境对其他生态系统所处干扰来解决问题的难易程度。生态敏感性分析能为区域生态环境和生态景观规划提供科学依据。选取贵阳市花溪区6个生态敏感因子(高程、坡度、坡向、水域、归一化植被指数、土地利用),运用层次分析法和GIS技术对花溪区生态敏感性进行评价分析。结果表明:花溪区生态敏感程度总体偏高,极高敏感至非敏感区占比分别为18.7%、32.6%、24.9%、16.3%、7.5%,空间分布具有显著差异,东部及北部区域生态敏感性较高,中部及东北部区域较低。通过生态敏感性空间分布格局分析,以期为生态景观规划提供一定参考。

Ecological sensitivity refers to the degree of difficulty to solve the problem through the interference of the regional environment to other ecosystems under external interference.Ecological sensitivity analysis can provide a scientific basis for the regional environment and ecological landscape planning by selecting six ecological factors(elevation,slope,slope direction,water,normalized difference vegetation index,and land use)in Huaxi District of Guiyangand using the analytic hierarchy process and GIS technology to evaluate and analyze the ecological sensitivity of Huaxi District.The results show that the overall degree of ecological sensitivity in the Huaxi district is on the high side.The proportions of extremely sensitive to non-sensitive areas are respectively 18.7%,32.6%,24.9%,16.3%,7.5%,and the spatial distribution is significantly different.The ecological sensitivity is higher in the eastern and northern regionsand lowers in the central and northeastern regions.Through the spatial distribution pattern of environmental sensitivity,to provide some reference for its ecological landscape planning.