基于主成分分析的云南省生态脆弱性评价

Ecological vulnerability evaluation based on principal component analysis in Yunnan province

人口资源环境矛盾造成了脆弱生态环境问题突出。以典型生态脆弱区云南省为研究区,根据导致该省生态环境脆弱的自然-结果表现因素,构建科学客观地评价指标体系,运用主成分分析法进行生态脆弱性分析评价。以生态脆弱度大小为依据,对云南省16个地(州)、市生态脆弱性进行了分区,划分为极强度、强度、中度、轻度脆弱区4个区。评价结果显示,极强度、强度、中度、轻度生态脆弱区分别占全省面积的5.84%、27.84%、43.08%、23.24%。为生态脆弱性评价提供了一个可行的方法,同时应用生态脆弱性分区结果可为后续的生态环境恢复重建工作、制定综合治理策略及区域可持续发展规划提供依据。

The contradictions among population,resources and the environment have highlighted the issue of ecological environment vulnerability.Based on the research at Yunnan province,one of the most typical ecological area of fragility,a scientific and objective evaluation index system was set up to analyze and evaluate the ecological vulnerability by adopting a method of principal component analysis.In terms of the ecological vulnerability of different degrees,this study divided the sixteen cities of Yunan province into four regions which include the extremely vulnerable region,intensively vulnerable region,moderately vulnerable region,and slightly vulnerable region.The results showed that vulnerable areas from extreme to mild vulnerability account for 5.84%,27.84%,43.08% and 23.24% respectively.The significance of this study was that it provided a feasible way to evaluate the ecological vulnerability,meanwhile,the evaluation results can be the basis for subsequent restoration and reconstruction of the eco-environment,and for the further formulation of comprehensive treatment strategies and regional planning of sustainable development.