基于Landsat8卫星影像的生态环境质量评价——以三峡库区的宜昌市为例

Ecological Environmental Quality Assessment Based on Landsat8 Satellite Images by Taking Yichang City of Three Gorges Reservoir Area as an Example

良好的生态环境是人类赖以生存和发展的基础,科学地进行生态环境监测和评价,对维护和改善生态环境具有非常重要的意义.在ArcGIS平台上,使用Landsat8卫星影像、DEM等数据定量反演各个环境影响因子并采用层次分析法(The analytic hierarchy process,AHP)来确定各个因子权重,进而构建出生态环境监测评估模型,得到宜昌市生态环境质量等级空间分布情况.结果表明:宜昌市的整体生态环境质量良好,生态环境质量的大致走势是自西北向东南依次增加;地方政府应当加强对宜昌西北山地不适宜区的治理.

A good ecological environment is the basis for human survival and development.Scientific monitoring and evaluation of ecological environment has the great significance for maintaining and improving the ecological environment.On the ArcGIS platform,Landsat8 satellite imagery,DEM and other data are used to quantitatively invert each environmental impact factor and AHP is used to determine the weight of each factor.And then we construct an ecological environment monitoring and evaluation model to obtain the spatial distribution of the ecological environment quality level in Yichang City.The results show that the overall ecological environment quality of Yichang City is good,and the general trend of ecological environment quality increases from northwest to southeast.Local governments should strengthen the treatment of unsuitable areas in the northwestern mountains of Yichang.