Emergy\|based ecological footprint model and its application to a natural resource\|dependent economy in Xuzhou City
基于能值的生态足迹模型及其在资源型城市的应用

The traditional ecological footprint models,developed to access the sustainability of regional developments.Their calculations used biologically productive areas with world average productivity as a common measurement unit for ecological footprints and carrying capacity.However,the basis of land productivity was subject to many limitations.In this study we present a new ecological footprint model which is based on the emergy theory.A sustainability evaluation index is also put forward to indicating the exte...