论文部分内容阅读
甘肃生态是国家生态战略的重要组成部分。文章选择甘肃省作为研究区域,在对其生态脆弱性现状和影响因素分析的基础上,从成因—结果表现两个方面选取20个指标构建评价指标体系,基于2000~2013年自然和经济社会数据,采用层次分析法赋权和综合指数法来实现对甘肃生态脆弱性的综合评价并对西部大开发以来生态脆弱度变化趋势进行分析。结果表明:甘肃省生态脆弱度较高,整体呈逐年上升趋势,是社会、环境和经济等因素综合驱动的结果。不同时期脆弱度等级有所变化,但幅度不大,总体处于强、中度脆弱状态。最后运用灰色关联模型,发现生态脆弱度与贫困人数、荒漠化程度、水土流失治理面积、垦殖率等高度相关。
Gansu Ecology is an Important Component of National Ecological Strategy. This article chooses Gansu Province as the research area. Based on the analysis of the current situation and influencing factors of ecological vulnerability, this paper selects 20 indexes from the cause - result performance to construct the evaluation index system. Based on the natural and economic social data from 2000 to 2013, , Using AHP method and comprehensive index method to realize the comprehensive assessment of ecological vulnerability in Gansu and analyzing the trend of ecological vulnerability since the western development. The results showed that the ecological fragility of Gansu Province was higher and the overall trend was increasing year by year, which was the result of the comprehensive driving of social, environmental and economic factors. The levels of vulnerability in different periods changed somewhat, but not in a big way. Overall, they were in a strong and moderately vulnerable state. Finally, by using the gray relational model, it is found that the degree of ecological vulnerability is highly correlated with the number of poor people, the degree of desertification, the area under control of soil erosion and the rate of cultivation.