1 Circular Economy and Industrial Ecology Group, Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 2 College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China; 3 School of Economy, Lanzhou University, Lanzhou 730000, China
Emergy-based study on eco-economic system of arid and semi-arid region: a case of Gansu province, China
1 Circular Economy and Industrial Ecology Group, Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 2 College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China; 3 School of Economy, Lanzhou University, Lanzhou 730000, China
摘要 Taking Gansu province as a model case, this study provides an integrated analysis on the eco-economic system of arid and semi-arid region based on emergy synthesis theory. Through calculating the values of renewable emergy flow, non-renewable resources, imported emergy, exported emergy, waste emergy, and total emergy during the period of 1978-2007, the performance of Gansu eco-economic system was analyzed. The results indicated that the renewable emergy flow within the province basically remained steady state which was estimated at 2.99×1022 solar emjoules (sej) from 1978 to 2007. The imported emergy and exported emergy were estimated at 3.75×1017 sej and 2.99×1020 sej in 1978 and increased to 1.07×1022 sej and 1.44×1022 sej respectively in 2007. The nonrenewable emergy flow was estimated at 1.62×1022 sej and increased to 1.85×1023 sej, with annual growth rate of 8.7%, while the estimated total emergy was 4.58×1022 sej in 1978 and increased to 2.11×1023 sej in 2007, with annual growth rate of 5.41%. Our results indicate a deteriorate situation between economic development and environmental protection in the region. The rapid economic growth in the past thirty years was based on a great consumption of nonrenewable resource and caused continuous decrease in the capacity of sustainable development. The environmental loading ratio was 0.53 in 1978, increased to 6.06 in 2007, indicating a rapid degradation of the regional environment quality. We calculated that the actual population was 1.53 times the renewable resource population in 1978, increased to 7.06 times in 2007. During the period of 1978-2007, the emergy rose from 2.45×1015 sej/(capita·a) to 8.07×1015 sej/(capita·a). Our analysis revealed that the emergy density presented a trend of gradual increase, and then the emergy currency ratio in Gansu decreased from 7.08×1013 sej/Chinese Yuan to 7.82×1012 sej/Chinese Yuan.
Abstract: Taking Gansu province as a model case, this study provides an integrated analysis on the eco-economic system of arid and semi-arid region based on emergy synthesis theory. Through calculating the values of renewable emergy flow, non-renewable resources, imported emergy, exported emergy, waste emergy, and total emergy during the period of 1978-2007, the performance of Gansu eco-economic system was analyzed. The results indicated that the renewable emergy flow within the province basically remained steady state which was estimated at 2.99×1022 solar emjoules (sej) from 1978 to 2007. The imported emergy and exported emergy were estimated at 3.75×1017 sej and 2.99×1020 sej in 1978 and increased to 1.07×1022 sej and 1.44×1022 sej respectively in 2007. The nonrenewable emergy flow was estimated at 1.62×1022 sej and increased to 1.85×1023 sej, with annual growth rate of 8.7%, while the estimated total emergy was 4.58×1022 sej in 1978 and increased to 2.11×1023 sej in 2007, with annual growth rate of 5.41%. Our results indicate a deteriorate situation between economic development and environmental protection in the region. The rapid economic growth in the past thirty years was based on a great consumption of nonrenewable resource and caused continuous decrease in the capacity of sustainable development. The environmental loading ratio was 0.53 in 1978, increased to 6.06 in 2007, indicating a rapid degradation of the regional environment quality. We calculated that the actual population was 1.53 times the renewable resource population in 1978, increased to 7.06 times in 2007. During the period of 1978-2007, the emergy rose from 2.45×1015 sej/(capita·a) to 8.07×1015 sej/(capita·a). Our analysis revealed that the emergy density presented a trend of gradual increase, and then the emergy currency ratio in Gansu decreased from 7.08×1013 sej/Chinese Yuan to 7.82×1012 sej/Chinese Yuan.
基金资助: Natural Science Foundation of China (40871061); Initial Fund for Doctors of Institute of Applied Ecology at Chinese Academy of Sciences (Y0SBS161S3); 100 Talents Program of the Chinese Academy of Sciences (08YBR111SS); Shenyang Bureau of Science and Technology (1091147-9-00); Natural Science Foundation of Liaoning province (20092078)
通讯作者:
Bing Xue
E-mail: xuebing @iae.ac.cn
引用本文:
Bing XUE, XingPeng CHEN, Yong GENG, Mian YANG, FuXia YANG, XiaoFen HU. Emergy-based study on eco-economic system of arid and semi-arid region: a case of Gansu province, China[J]. 干旱区科学, 10.3724/SP.J.1227.2010.00207.
Bing XUE, XingPeng CHEN, Yong GENG, Mian YANG, FuXia YANG, XiaoFen HU. Emergy-based study on eco-economic system of arid and semi-arid region: a case of Gansu province, China. Journal of Arid Land, 2010, 2(3): 207-213.
