Evolutionary Tendency of Ecological-economic System in Chang-Zhu-Tan City Cluster Based on Emergy Analysis
用能值方法分析了2000-2009年长株潭城市群生态经济系统的能值流和可持续发展指数变化，发现系统处于中等发展水平，但呈现不可持续趋势，并提出了发展策略。
With emergy method we studied the emergy flow,a variety of emergy indices of the social economic natural subsystem and the change trend of sustainable development index in Chang-Zhu-Tan city cluster ecological-economic system from 2000 to 2009.The result showed: Chang-Zhu-Tan city cluster ecological-economic system was middledeveloping level,relied mainly on local resources,increasing the external input emergy,the growing strength of economic development,the rapid increase of industrialization and information level,but a downward trend of emergy production and use in efficiency,adding up to environmental loading rate,presenting an unsustainable trend.According to the results Chang-Zhu-Tan city cluster eco-economic system development strategies were put forword to transform economic development,improve harmony between economic social development and the natural environment,promote the trinity of structural stability,functional efficiency and sustainable development,to enter the benign and healthy development track.