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基于主成分分析方法改进的STIRPAT模型分析了1990~2011年定西市生态足迹的影响因素。1990~2011年定西市总生态足迹呈现缓慢上升趋势,人类活动对该区域生态的压力增大。改进的STIRPAT模型可以解决原始STIRPAT模型分析过程中的自变量共线性问题。结果表明,经济发展因子对总生态足迹、生物消费生态足迹均为正向影响,对能源消费生态足迹为负向影响。工业因子对总生态足迹、生物消费生态足迹和能源消费生态足迹的影响均为正向,对能源消费生态足迹的影响强度相对较大。总人口、人均GDP、第二产业占GDP的比例、第三产业占GDP的比例、城镇居民人均可支配收入、农民人均纯收入对定西市生态足迹呈现正向驱动影响,城乡人均收入增长对于生态足迹的影响无显著差异。
Based on the improved STIRPAT model of principal component analysis, the influencing factors of ecological footprint in Dingxi City from 1990 to 2011 were analyzed. The total ecological footprint of Dingxi City showed a slowly increasing trend from 1990 to 2011, and human activities increased the ecological pressure on the area. The improved STIRPAT model can solve the problem of collinearity of independent variables in the original STIRPAT model analysis. The results show that the economic development factors have a positive effect on the total ecological footprint and the ecological footprint of biological consumption, and have a negative impact on the ecological footprint of energy consumption. The impact of industrial factors on the total ecological footprint, the ecological footprint of biological consumption and the ecological footprint of energy consumption are all positive, and the impact on the ecological footprint of energy consumption is relatively strong. The total population, GDP per capita, the ratio of secondary industry to GDP, the ratio of tertiary industry to GDP, the per capita disposable income of urban residents and the per capita net income of farmers show a positive driving effect on the ecological footprint of Dingxi City. The growth of per capita income in urban and rural areas, There was no significant difference in footprint.