基于能值改进生态足迹的长株潭城市群可持续发展研究

为衡量和评价区域发展的可持续状况,针对传统生态足迹模型的不足，利用从系统论出发并具有基于流量算法优点的能值分析理论,建立基于能值改进的生态足迹模型，该模型增加了水消费、污染等生态足迹，用输入输出能值对生态足迹进行调整，同时生态承载力扩展为自然生态承载力、基于净初级生产力的生态承载力、生态服务价值承载力和人类劳务生态承载力等，并综合评价系统可持续发展度，充分考虑了城市生态系统的开放性,物质、能量、信息的流通性，以及人类作用的主观能动性等，较为全面地反映城市生态经济复合系统的结构、功能和发展的持续性。采用该模型计算了长株潭城市群2000～2008年人均生态足迹和生态承载力的演变,结果显示生态足迹不断增加，生态承载力波动发展，略有下降，而生态赤字增加明显，可持续发展评价指数高于05且趋近于1，城市群可持续性发展状况堪忧，采取必要的措施刻不容缓

RESEARCH ON SUSTAINABLE DEVELOPMENT OF CHANG-ZHU-TAN CITY CLUSTER USING A MODIFIED EMERGY-BASED ECOLOGICAL FOOTPRINT MODEL

For measuring and evaluating regional sustainable development conditions,in view of some shortags of traditional ecological footprint model,using emergy analysis theory from the system on the advantages of a flow algorithm,a modified emergy-based ecological footprint model was established.It increased ecology footprint of the consumption of water,the pollution and so on,adjusted ecology footprint with the input and output emergy.At the same time,ecological carrying capacity was expanded as the natural ecological carrying capacity,the ecological carrying capacity based on net primary productivity,the value of ecosystem services carrying capacity and human services ecological carrying capacity.And sustainable development degree was comprehensively evaluated.It was fully accounted of the openness of urban ecosystems,the flow of matter,energy and information,as well as the role of human initiative,etc,and more fully reflected the complex system of urban ecological economic structure,function and development of sustainability.Using the model,we calculated evolution of per capita ecological footprint and per capita ecological carrying capacity from 2000 to 2008 in Chang-Zhu-Tan City Cluster.The results showed that ecological footprint was increasing,the ecological capacity was wave development and decreased slightly,ecology deficit had the growth situation,sustainability evaluation index was higher than 0.5 and next to 1,so sustainable development conditions was worried.It is necessary to take the measures without delay.