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Water Scarcity And The Impact Of Improved Irrigation Management: A Cge Analysis

  • Alvaro Calzadilla
  • Katrin Rehdanz
  • Richard S.J. Tol

    ()

    (Economic and Social Research Institute)

We use the new version of the GTAP-W model to analyze the economy-wide impacts of enhanced irrigation efficiency. The new production structure of the model, which introduces a differentiation between rainfed and irrigated crops, allows a better understanding of the use of water resources in agricultural sectors. The results indicate that a water policy directed to improvements in irrigation efficiency in water-stressed regions is not beneficial for all. For water-stressed regions the effects on welfare and demand for water are mostly positive. For non-water scarce regions the results are more mixed and mostly negative. Global water savings are achieved. Not only regions where irrigation efficiency changes are able to save water, but also other regions are pushed to conserve water.

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File URL: http://www.fnu.zmaw.de/fileadmin/fnu-files/publication/working-papers/CGEirrigationWP.pdf
File Function: First version, 2008
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Paper provided by Research unit Sustainability and Global Change, Hamburg University in its series Working Papers with number FNU-160.

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Length: 34 pages
Date of creation: Apr 2008
Date of revision: Apr 2008
Handle: RePEc:sgc:wpaper:160
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Web page: http://www.fnu.zmaw.de/

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  1. Maria Berrittella & Katrin Rehdanz & Arjen Y. Hoekstra & Roberto Roson & Richard S.J. Tol, 2006. "The Economic Impact Of Restricted Water Supply: A Computable General Equilibrium Analysis," Working Papers FNU-93, Research unit Sustainability and Global Change, Hamburg University, revised Jul 2006.
  2. Decaluwe, B. & Patry, A. & Savard, L., 1999. "`When Water Is No Longer Heaven Sent: Comparative Pricing Analysis in an AGE Model," Papers 9905, Laval - Recherche en Politique Economique.
  3. Burniaux, Jean-Marc & Truong Truong, 2002. "GTAP-E: An Energy-Environmental Version of the GTAP Model," GTAP Technical Papers 923, Center for Global Trade Analysis, Department of Agricultural Economics, Purdue University.
  4. Rosegrant, Mark W. & Cai, Ximing & Cline, Sarah A., 2002. "Water and food to 2025," 2020 vision briefs 13, International Food Policy Research Institute (IFPRI).
  5. Maria Berrittella & Katrin Rehdanz & Roberto Roson & Richard S.J. Tol, 2006. "The Economic Impact Of Water Pricing: A Computable General Equilibrium Analysis," Working Papers FNU-96, Research unit Sustainability and Global Change, Hamburg University, revised Jan 2006.
  6. Seagraves, J.A. & Easter, K. William, 1982. "Pricing for Irrigation Water," Economic Reports 8445, University of Minnesota, Department of Applied Economics.
  7. Maria Berrittella & Katrin Rehdanz & Richard S.J. Tol & Jian Zhang, 2007. "The Impact Of Trade Liberalisation On Water Use: A Computable General Equilibrium Analysis," Working Papers FNU-142, Research unit Sustainability and Global Change, Hamburg University, revised Aug 2007.
  8. van Heerden, Jan H. & Blignaut, James & Horridge, Mark, 2008. "Integrated water and economic modelling of the impacts of water market instruments on the South African economy," Ecological Economics, Elsevier, vol. 66(1), pages 105-116, May.
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  11. Hiro Lee & Joaquim Oliveira Martins & Dominique van der Mensbrugghe, 1994. "The OECD Green Model: An Updated Overview," OECD Development Centre Working Papers 97, OECD Publishing.
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  13. Maria Berrittella & Katrin Rehdanz & Richard S.J. Tol, 2006. "The Economic Impact of the South-North Water Transfer Project in China: A Computable General Equilibrium Analysis," Working Papers 2006.154, Fondazione Eni Enrico Mattei.
  14. Anthony Letsoalo & James Blignaut & Theuns de Wet & Martin de Wit & Sebastiaan Hess & Richard S.J. Tol & Jan van Heerden, 2005. "Triple Dividends Of Water Consumption Charges In South Africa," Working Papers FNU-62, Research unit Sustainability and Global Change, Hamburg University, revised Apr 2005.
  15. Scott McDonald & Sherman Robinson & Karen Thierfelder, 2007. "Globe: A SAM Based Global CGE Model using GTAP Data," Departmental Working Papers 14, United States Naval Academy Department of Economics.
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  22. Abdul Kamara & Hilmy Sally, 2004. "Water management options for food security in South Africa: scenarios, simulations and policy implications," Development Southern Africa, Taylor & Francis Journals, vol. 21(2), pages 365-384.
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  24. Mailhol, J. C. & Zairi, A. & Slatni, A. & Ben Nouma, B. & El Amani, H., 2004. "Analysis of irrigation systems and irrigation strategies for durum wheat in Tunisia," Agricultural Water Management, Elsevier, vol. 70(1), pages 19-37, October.
  25. Lilienfeld, Amy & Asmild, Mette, 2007. "Estimation of excess water use in irrigated agriculture: A Data Envelopment Analysis approach," Agricultural Water Management, Elsevier, vol. 94(1-3), pages 73-82, December.
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