%0 Journal Article
%T A new emergy index for urban sustainable development<br>城市可持续发展能力的能值评价新指标(英文)
%A LU Hongfang
%A YE Zheng
%A ZHAO Xinfeng
%A PENG Shaolin
%A <br>陆宏芳
%A 叶正
%A 赵新锋
%A 彭少麟
%J 生态学报
%D 2003
%I 
%X The evaluation of the sustainable development ability of urban ecological economic systems quantitatively has been more and more highlighted, following the non-invertible urbanization trend of the world. New methods are needed to solving the interface problem between nature and economic society. Founded by H.T. Odum, emergy synthesis has been seemed as a bridge between natural and economic system. Broken through the "energy quality wall" of traditional energy theory, emergy theory realized the unified assessment of energies with different quality and type and moved the energy analysis into a new phase. But the emergy indices system for this evaluation is still young and need to be improved. The establishment of Emergy Sustainable index (ESI) and its quantification partly covered the gap of emergy index for sustainable development and promoted the study of sustainable development. However, the sub-index which it used to express the sustainable benefit is not always beneficial and helpful to our sustainable development, limited by our current knowledge and technology. Simultaneously, the sub-index which it used to express the environmental impact can only reflect the consumption structure of resource, leaving the environmental impact of expelled pollutant be neglected. This paper is a study on emergy indices for the evaluation of urban's sustainable development ability. Based on the deficiency analysis of ESI and the concept of sustainable development, a new Emergy Index for Sustainable Development (EISD) is deduced. Employing EISD, a case study is conducted to evaluate the development of Zhongshan city Pearl Delta, during 1996 to 2000. The result is that the EISD of Zhongshan had appreciably declined from 0.1573 in 1996 to 0.1510 in 1998, and quickly improved from 0.1510 in 1998 to 0.1785 in 2000. The consume structure of Zhongshan city was less and less depended on nonrenewable resource come from local natural or purchasing, with its Environmental Loading Ratio (ELR) decreased from 5.2761 in 1996 to 3.6769 in 2000. On the contrary, the Emergy Waste Ratio (EWR) increased from 0.1384 in 1996 to 0.1779 in 2000. Finally, the whole environmental impact decreased from 5.4145 in 1996 to 3.8548 in 2000. The decreasing of Emergy Yield Ratio (EYR) of Zhongshan city shows that Zhongshan city is more and more depended on the purchased input, and the percent of renewable resource in purchased input had increased during 1997 to 2000. The Emergy Exchange Ratio (EER) of Zhongshan city had decreased from 1997 to 2000, partly because of its product construction and the influence of economic decline of the whole world. Zhongshan city should pay more attention to improve its production efficiency and decrease its waste ratio. More ecology principles should by applied into the development of urban system, with the accelerated urbanization of our country. The case study shows that EISD can assessment the sustainable development ability more roundly, with the considera
%K index
%K emergy
%K urban sustainable development
%K Zhongshan city<br>指标
%K 能值
%K 城市可持续发展
%K 中山市
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=2580376DFEA2A560&yid=D43C4A19B2EE3C0A&vid=EA389574707BDED3&iid=DF92D298D3FF1E6E&sid=196264D95F295743&eid=5A64531D29896B77&journal_id=1000-0933&journal_name=生态学报&referenced_num=16&reference_num=23