【摘要】 以闽江流域生态脆弱性为研究对象,鉴于生态脆弱性成因的复杂性及闽江流域生态环境的现实情况,构建流域生态脆弱性评价指标体系,建立基于GIS技术闽江流域生态环境脆弱性各指标体系的属性库,通过GIS的空间主成分分析方法,采用综合指数法实现闽江流域生态环境脆弱性的评价。结果表明,闽江流域生态脆弱度的总平均值为0.501 2,且各县市的脆弱度差异不太明显,其中最大的脆弱度值为0.623 9,最小的脆弱度值为0.401 4,属中度脆弱。更多还原

【Abstract】 The causes of ecological fragility in Minjiang watershed was analyzed based on the comprehension of the ecological fragility and the facts of the ecological fragility of Minjiang watershed.The index system which would estimate the ecological fragility was established.The fragile database was established with the help of the normal data procession based on GIS and the ecological fragility of Minjiang watershed was evaluated by the comprehensive index with the help of the principal component analysis.The results showed that: the average fragility was 0.501 2 and there were few differences among the counties in Minjiang Watershed which belongs to the medium fragility and the most severity was 0.623 9,while the least severity was 0.401 4.更多还原