基于能值理论的成都市生态经济系统可持续性评估

运用能值理论与方法,建立了以能值产出率、能值密度、能值-货币比率、环境负载率和可持续发展指数等9个指标的评价指标体系,并对2005-2009年成都市生态经济系统发展态势进行了定量描述.结果表明:近几年系统能值产出率持续降低,环境负荷率由17.49上升到37.77,可持续发展指数从0.26下降到0.06；城市经济社会综合实力显著增强,但由此造成的环境压力不断增大,阻碍了系统的可持续发展；成都市全面提升可持续发展能力的关键,应从产业结构的优化调整入手,提高资源能值利用效率,大力推行清洁生产,创建循环经济产业链,加大高科技的应用力度和范围.

Sustainability assessment on eco-economic system of Chengdu City based on emergy analysis

Based on the theories and methodologies of emergy analysis,an assessment index system including emergy yield ratio,emergy density,emergy/currency(US dollar) ratio,environmental loading rate,and emergy sustainability index was established,and a quantitative study on the development trend of the eco-economic system of Chengdu,Sichuan Province of Southwest China from 2005 to 2009 was conducted.In the study period,the emergy yield ratio of the eco-economic system was in declining,the environmental loading rate ...