河北生态经济系统能值分析

生态经济系统研究对制定可持续发展战略有重要意义。本文应用能值分析方法对2007年河北省生态经济系统的资源利用状况、投入与产出、环境负荷等进行了综合分析。结果表明：总能值使用量为7.70×1023sej，其中不可更新资源产品能值7.42×1023sej，可更新环境资源能值4.93×1022sej，进口能值5.33×1022sej，出口能值7.41×1022sej；可更新资源产品能值2.13×1023sej，其中农产品能值为1.23×1023sej，畜产品能值为6.78×1022sej，水产品能值为8.37×1021sej；能值自给率为105.4%，能值产出率为30.3%，能值使用密度为4.10×1012sej.m-2，人均能值使用量为1.11×1016sej.人-1，能值货币比率为5.62×1011sej.元-1，废气物能值为4.66×1021sej，环境负荷率16.1，可持续发展指数为53.2，整体上说明本生态经济系统是不可持续的。

Emergy analysis of eco-economic systems of Heibei Province

The study of eco-economic system was important to the formulation of sustainable development strategy. Using the Emergy analysis method, a comprehensive analysis of the Hebei eco-economic system in 2007 was conducted on resource utilization, input and output, environmental load. The results showed that total energy usage was 7.70×1023sej, including the value of non-renewable resources products, renewable environmental resources, imports , exports was 7.42×1023sej , 4.93×1022sej, 5.33×1022sej, 7.41×1022sej, 2.13×1023sej, respectively; the value of renewable resource products was 2.13×1023sej, including the value of agricultural products, animal products, aquatic products was 1.23×1023sej, 6.78×1022sej, 8.37×1021sej, respectively; Emergy self-sufficiency was 105.4%, Emergy yield ratio was 30.3%, energy using density was 4.10×1012sej.m-2, energy usage per capita was 1.11×1016sej.人-1, Emergy currency ratio was 5.62×1011sej.元-1, waste Emergy was 4.66×1021sej, environmental loading ratio was 16.1, sustainable development index was 53.2. To sum up, the eco-economic system was unsustainable development.