Emergy evaluation perspectives of an irrigation improvement project proposal in China
Emergy theory and method are used to evaluate the feasibility of an irrigation improvement project in China and its contribution to local agricultural development. An emergy method for evaluating the costs and benefits of the project and a composite index named the emergy cost-benefit ratio (EmCBR) were developed. The emergy evaluation shows that the major costs associated with the proposed project come from earthwork (77.4% of the total cost) and concrete work (15.4%), and that water saving (43.0% of the total benefit) and agricultural yield increase (56.9%) are the most important contributions. The calculated EmCBR is 0.97 (the lowest value for a feasible project is 1.0) which indicates that this project would not be feasible in emergy terms. The regional agricultural system could not benefit from the proposed project, according to several emergy indices: emergy yield ratio (EYR), emergy investment ratio (EIR), environmental load ratio (ELR) and environmental sustainability index (ESI). The results show that conventional cost-benefit analysis could fail to provide an adequate decision-making framework because it is unable to value resources and environmental impacts properly. More additional emergy evaluations should be completed on other alternatives to the proposed project to provide adequate guidelines for selecting the best alternative that contributes most to agricultural development with limited environmental impact.
If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.
As the access to this document is restricted, you may want to look for a different version under "Related research" (further below) or search for a different version of it.
References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Patterson, Murray G., 2002. "Ecological production based pricing of biosphere processes," Ecological Economics, Elsevier, vol. 41(3), pages 457-478, June.
- Jiang, M.M. & Chen, B. & Zhou, J.B. & Tao, F.R. & Li, Z. & Yang, Z.F. & Chen, G.Q., 2007. "Emergy account for biomass resource exploitation by agriculture in China," Energy Policy, Elsevier, vol. 35(9), pages 4704-4719, September.
- Playan, Enrique & Mateos, Luciano, 2006. "Modernization and optimization of irrigation systems to increase water productivity," Agricultural Water Management, Elsevier, vol. 80(1-3), pages 100-116, February.
- Dong, Xiaobin & Ulgiati, Sergio & Yan, Maochao & Gao, Wangsheng, 2008. "Progress, influence and perspectives of emergy theories in China, in support of environmentally sound economic development and equitable trade," Energy Policy, Elsevier, vol. 36(3), pages 1019-1028, March.
- Cuihong Yang & Xikang Chen & Jian Xu, 2008. "A Method to Optimize Gross Fixed Capital Investments for Water Conservancy in China," Economic Systems Research, Taylor & Francis Journals, vol. 20(2), pages 151-172.
- Meijer, Karen & Boelee, Eline & Augustijn, Denie & Molen, Irna van der, 2006. "Impacts of concrete lining of irrigation canals on availability of water for domestic use in southern Sri Lanka," Agricultural Water Management, Elsevier, vol. 83(3), pages 243-251, June.
- Blanke, Amelia & Rozelle, Scott & Lohmar, Bryan & Wang, Jinxia & Huang, Jikun, 2007. "Water saving technology and saving water in China," Agricultural Water Management, Elsevier, vol. 87(2), pages 139-150, January.
- Bebbington, Jan & Brown, Judy & Frame, Bob, 2007. "Accounting technologies and sustainability assessment models," Ecological Economics, Elsevier, vol. 61(2-3), pages 224-236, March.
- Okada, H. & Styles, S.W. & Grismer, M.E., 2008. "Application of the Analytic Hierarchy Process to irrigation project improvement: Part I. Impacts of irrigation project internal processes on crop yields," Agricultural Water Management, Elsevier, vol. 95(3), pages 199-204, March.
When requesting a correction, please mention this item's handle: RePEc:eee:ecolec:v:70:y:2011:i:11:p:2154-2162. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Zhang, Lei)
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
If references are entirely missing, you can add them using this form.
If the full references list an item that is present in RePEc, but the system did not link to it, you can help with this form.
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your profile, as there may be some citations waiting for confirmation.
Please note that corrections may take a couple of weeks to filter through the various RePEc services.