基于能值改进生态足迹模型的全国省区生态经济系统分析

Accounting Provincial Eco-economic System in China Using a Modified Emergy-Based Ecological Footprint Model

以我国1996,2000,2004,2008年各省区为例,分别采用传统生态足迹模型及基于能值改进生态足迹模型,从全国、地区、省区内3个层面,利用Theil系数进行区域可持续性及东、中、西部地区时空差异判定。结果表明:改进模型计算结果绝对数值明显高于传统模型,总体人均生态足迹、生态承载力及生态盈余与赤字区域排列均为东部>中部>西部。东、中、西部地区区内及区际差异结果分解表明:我国生态足迹、生态承载力省、区间的差异主要由区域内部省间差异导致;东、中、西地区尺度上,三者间差异并非构成我国区域差异的主体,区间差异基本保持稳定;区内尺度上,除西部地区外,东、中部地区差异略有下降,而西部地区异质性减少明显。

By using a modified emergy-based ecological footprint model and Theil index, the authors accounted and analyzed the changing process of the per capita consumption ecological footprint and local output ecological carrying capacity in China in 1996, 2000, 2004 and 2008. The results show that the absolute value of the improved model results was significantly higher than the traditional model. Overall per capita ecological footprint, ecological carrying capacity and ecological surplus and deficit were higher in east region than in middle and west regions. Analysis of the Theil index show that during 1996 and 2008 the main differences between the regions were caused by the differences within intra region rather than the inter-region. At the regional level, differences among the three regions remained stable; at provincial level, difference slightly decreased in east and middle regions, while the west rezion decreased significantly.