Abstract:

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