基于AHP的民勤县生态敏感性评价

Assessment ofecological sensitivity in Minqin County based on AHP

以甘肃省武威市民勤县为研究对象,依据地形因素、气象因素、土壤盐渍化和人类活动四个层面选取15项指标因子构建民勤县生态敏感性评价体系,并运用层次分析法对民勤县生态敏感性进行综合评价.研究表明:民勤县生态敏感性的空间分布差异较大,整体表现为中度敏感性,主要位于西部和东北部;高度敏感、极高敏感区主要分布在民勤县西北和东南部,极低敏感区和低敏感位于中部绿洲区和东部地形平坦地区;中敏感区面积最大,为5565 km^(2),占研究区面积的35%,高敏感区和极高敏感区面积795 km^(2),占研究区面积的16%.因此,应加强民勤县西北和东南部的生态环境保护.

This paper takes Minqin County,Wuwei City,Gansu Province,as the research object,15 indeX factors are selected based on four levels:topographic factors,meteorological factors,soil salinity and human activities to build an ecological sensitivity evaluation system,and the analytic hierarchy process(AHP)is used to make a comprehensive evaluation oFthe ecological sensitivity.The study shows that the spatial distribution oFecological sensitivity in Minqin County varies greatly,and the overall ecological sensitivity is moderate,mainly located in the west and northeast;highly sensitive and eXtremely sensitive areas are mainly distributed in the northwest and southeast,and very low sensitive areas and low sensitivity are located in the central oasis area and the flat topography oFthe east.The medium sensitive area occupies the largest area oF5565 km^(2),accounting for 35%oFthe total area oFthe study area,and the high sensitive area and very high sensitive area occupy an area oF795 km^(2),accounting for 16%oFthe total area oFthe study area,so the ecological protection oFthe northwest and southeast oFMinqin County should be strengthened.