评价系统可持续发展能力的能值指标

Studies on emergy indices for evaluating system sustainable development property.

对国际能值分析理论现行能值评价指标体系作了归并简化,提出了评价系统可持续发展能力的新的能值指标(EISD);并将其应用于珠江三角洲基塘农业生态工程建设中,对3种基塘农业生态工程模式进行了实例比较研究.结果表明,EISD同时兼顾环境影响和经济效益,能更好地评价同等环境压力下不同的产品生产结构对社会经济发展贡献的不同,即系统可持续发展能力的不同及其成因.

A new emergy index of sustainable development(EISD) for evaluating system sustainable development property is suggested to simplify and merge the current emergy evaluation indices system of international emergy analyis theory. Using the new EISD, a case study is made to compare three different dike-pond modes in Pearl Delta. The result shows that EISD considering both the environmental impact and economic benefit, can evaluate better the system sustainable development property difference and its cause of formation, i.e. the different contribution of different production structure to social economic development under equal environmental impact.