基于MFA和STIRPAT的定西市物质输入输出及环境压力

发布时间：2018-06-12 14:52

本文选题：物质流 + 生态经济系统　；参考：《兰州大学学报(自然科学版)》2011年05期

【摘要】：运用物质流分析方法,对定西市生态经济系统分析结果表明:在不考虑水的情况下物质输入和输出分别以2.24%和5.68%的速度波动缓慢上升;物质输入上升速度低于物质生产力上升速度和物质利用强度降低速度,单位GDP污染物排放强度以年均6.59%的速度直线下降,可见物质利用效率的提高速度较快,而2004-2008年,物质生产力每年提高2.52%,物质利用强度年均降低2.27%,均小于物质输入增加速度,反映资源压力有增加倾向;人均污染排放强度年均以2.43%的速度缓慢上升,并通过构建STIRPAT模型发现,人均GDP和第一、二产业对环境压力呈正显著性影响,环境压力有增大趋势;目前,资源利用效率提高速度较快,单位GDP污染物排放强度逐渐降低,表现出经济与环境逐步协调发展.然而,依照现行模式继续发展,资源和环境压力持续增加,定西生态经济系统处于不可持续发展的状态.
[Abstract]:By means of material flow analysis, the result of the analysis of the ecological economic system in Dingxi shows that the material input and output fluctuate slowly with the speed of 2.24% and 5.68% without considering water, and the rising speed of material input is lower than that of the increase of material productivity and the decrease of material utilization intensity, and the emission intensity of the unit GDP pollutants is The average annual rate of 6.59% is straight down, and the increase of material utilization efficiency is faster. In the 2004-2008 year, the material productivity increases by 2.52% and the material use intensity decreases by 2.27% annually, which is less than the increase of material input, reflecting the increasing tendency of resource pressure, and the annual average per capita pollution discharge intensity increases slowly at a rate of 2.43%. After the construction of STIRPAT model, it is found that per capita GDP and the first, second industry have a positive impact on environmental pressure, and the environmental pressure is increasing. At present, the efficiency of resource utilization is faster, and the emission intensity of unit GDP is gradually reduced, and the economic and environmental development is gradually coordinated. With the continuous increase of environmental pressure, Dingxi's eco economic system is in a state of unsustainable development.
【作者单位】：兰州大学资源环境学院;
【基金】：国家自然科学基金项目(40871061)
【分类号】：X196

【参考文献】