Sensitivity evaluation of ecological environment in Song County based on GIS and analytic hierarchy process
Supported by geographic information systems(GIS)technology,using the analytic hierarchy process(AHP),a comprehensive evaluation system of ecological environment sensitivity was established to evaluate the ecological environment sensitivity of Song County.Firstly,the single factor sensitivity evaluation analysis was carried out on the six selected indicators of elevation,slope,slope direction,water buffer zone,NDVI and land use.Then the variation range of comprehensive evaluation value was obtained by using multi-factor spatial weighted superposition.Finally,the natural discontinuous point method was used to divide the ecological sensitivity,and the com-prehensive ecological environmental sensitivity distribution map of Song County was constructed.The results show that the overall eco-logical environmental sensitivity of Song County is mainly medium and high,and the areas of extremely sensitive area,highly sensitive area,medium sensitive area,low sensitive area and the extremely low sensitive area account for 26.23％,30.05％,18.01％,15.74％and 9.97％,respectively.The extremely sensitive and highly sensitive areas are mainly distributed in the middle mountain area of Funiu Mountain and Xiong'er Mountain.The medium sensitive areas are mainly distributed in the mountainous and hilly areas with higher ele-vation.The low and extremely low sensitive areas are mainly distributed in populated areas and river valley terraces and floodplains.
万方数据
维普
