云南纵向岭谷区生态安全评价及影响因素分析

根据云南纵向岭谷区生态环境特点,按照层次分析法建立了生态安全评价指标体系.在应用综合指数法评价云南纵向岭谷区生态安全的基础上,引进灰色系统理论的灰色关联分析方法对影响纵向岭谷区14个地、州、市的生态安全主导因素进行了分析评价.研究表明:云南纵向岭谷区生态安全总体状况良好,植被覆盖度、人口自然增长率、水量变化、产业结构、人口素质、水土流失率和开发土地比例是影响生态安全的主要因素;纵向岭谷区内各区域和流域之间生态安全状况存在差异,生态安全综合指数较高的区域和流域分别是西部地区和怒江流域.针对各个地区生态安全状况的差异及影响因素的不同,该区域应因地制宜地进行生态环境管理,保障自然、经济、生态环境协调发展.

Ecological security assessment and affecting factors analysis of longitudinal rangegorge region in Yunnan Province, China

According to eco-environmental characteristics of longitudinal range-gorge region in Yunnan Province,China,an appraisal indicators system of ecological security was established by the analytic hierarchy process method.Based on this system,the comprehensive index method and gray correlation theory were applied to appraise the ecological security state and analyze the key factors of ecological security of the region.The results show that the ecological security state in the region as a whole is good.Main factors which affect ecological security are vegetation overcast rate,population natural growth rate,water quantity change,industry structure,population diathesis,soil losing rate,and exploiture land rate.There are different ecological states in different regions and drainage areas,and the ecological states of west region and Nujiang drainage area are the best.Different measures should be taken to manage eco-environment in the region so as to protect the coordination development of natural,economic and ecological environment.