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A MODIFIED ECOLOGICAL FOOTPRINT MODEL AND ITS APPLICATION TO AGRO-ECONOMIC ECOSYSTEM BEFORE AND AFTER GRAIN FOR GREEN POLICY IN THE WATERSHED SCALE ON THE LOESS PLATEAU IN CHINA
语种英语
Zhou Ping1; Zhuang Wenhua2; Liu Guo-Bin3; Wen Anbang1; He Xiubin1; Wang Bing3
专著文集名WATERSHEDS: MANAGEMENT, RESTORATION AND ENVIRONMENTAL IMPACT
编著者Vaughn JC
出处页码319-330
2010
出版者Nova Science Publishers
出版地New York
关键词modified ecological footprint model emergy analysis grain for green policy agricultural eco-economic system watershed scale
收录类别BKCI-S
英文摘要Based on the theory of emergy analysis and the introduced concept of emery density, a modified ecological footprint model was established to evaluate the environmental status of sustainability in the given region. The main process was to use this model to transform all kinds of energy flows of the eco-economic systems into the corresponding biological productive units and then combine with emergy density to calculate ecological footprint and ecological carrying capacity. With the agricultural eco-economic system of zhifanggou watershed in hilly-gullied loess region as an example, we applied the modified and traditional model of ecological footprint to analysis the changes of this region before and after grain for green policy. By using the modified model, we could find that the carrying capacity per capita was 0.256hm(2)/cap and 0.201hm(2)/cap separately before and after grain for green policy, while the ecological footprint per capita was 0.183 hm(2)/cap and 0.118hm(2)/cap separately. All results showed an ecological surplus. And the index of sustainability was 0.528 and it belonged to the slight sustainability condition before this policy, but after this policy, the index of sustainability was 0.630 and it belonged to the middle sustainability condition. Meanwhile, the results of ecological footprint per capita were 0.733hm(2)/cap and 0.650hm(2)/cap separately. By using the traditional model, the ecological carrying capacities were 1.559hm(2)/cap and 1.781hm(2)/cap separately before and after grain for green policy. And they all showed ecological surplus and belonged to the middle sustainability condition. From all the above, the results all showed that the calculation results of the modified ecological footprint model were more realistic situations of zhifanggou watershed and the conclusion was more reasonable than the traditional one.
ISBN号978-1-61668-667-3
WOS记录号WOS:000284344600011
引用统计
文献类型专著章节文集论文
条目标识符/handle/131551/33456
专题山地表生过程与生态调控重点实验室
科技与合作处
通讯作者Wang Bing
作者单位1.Institute of Mountain Hazards and Envirnment, CAS;
2.College of Water Conservancy and Hydropower, Sichuan University;
3.Institute of Soil and Water Conservation, CAS and Minsistry of Water Resources
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GB/T 7714
Zhou Ping,Zhuang Wenhua,Liu Guo-Bin,et al. A MODIFIED ECOLOGICAL FOOTPRINT MODEL AND ITS APPLICATION TO AGRO-ECONOMIC ECOSYSTEM BEFORE AND AFTER GRAIN FOR GREEN POLICY IN THE WATERSHED SCALE ON THE LOESS PLATEAU IN CHINA. WATERSHEDS: MANAGEMENT, RESTORATION AND ENVIRONMENTAL IMPACT. New York:Nova Science Publishers,2010:319-330.
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