Emergy evaluation of a pumping irrigation water production system in China

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• 作者：Dan Chen (1) (2)
  Zhaohui Luo (3)
  Michael Webber (2)
  Jing Chen (1)
  Weiguang Wang (4)
  
• 关键词：emergy ; evaluation ; irrigation ; water
• 刊名：Frontiers of Earth Science
• 出版年：2014
• 出版时间：March 2014
• 年：2014
• 卷：8
• 期：1
• 页码：131-141
• 全文大小：263 KB
• 作者单位：Dan Chen (1) (2)
  Zhaohui Luo (3)
  Michael Webber (2)
  Jing Chen (1)
  Weiguang Wang (4)
  
  1. Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China (Ministry of Education), College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, 210098, China
  2. Department of Resource Management and Geography, The University of Melbourne, Victoria, 3010, Australia
  3. College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China
  4. College of Hydrology and Water Resources, Hohai University, Nanjing, 210098, China
  
• ISSN：2095-0209

文摘

The emergy concept was used to evaluate a pumping irrigation water production system in China. A framework for emergy evaluation of the significance of irrigation water and its production process was developed. The results show that the irrigation water saved has the highest emergy value (8.73E + 05 sej·J?), followed by the irrigation water supplied to farmlands (1.72E + 05 sej·J?), the pumped water (4.81E + 04 sej·J?), with the lowest value shown from water taken from the local river (3.72E + 04 sej·J?). The major contributions to the emergy needed for production are the inputs of soil and water. This production system could contribute to the irrigated agriculture and economy, according to several calculated emergy indices: emergy yield ratio (EYR), emergy investment ratio (EIR), environmental load ratio (ELR), and environmental sustainability index (ESI). The comparative analysis shows that the emergy theory and method, different from the conventional monetary-based analysis, could be used to evaluate irrigation water and its production process in terms of the biophysical account. Additional emergy evaluations should be completed on different types of water production and irrigated agricultural systems to provide adequate guidelines for the sustainability of irrigation development.