Water scarcity and the impact of improved irrigation management: a computable general equilibrium analysis.

Calzadilla, A., Rehdanz, K. and Tol, R. S. J. (2011) Water scarcity and the impact of improved irrigation management: a computable general equilibrium analysis. Agricultural Economics, 42 (3). pp. 305-323. DOI 10.1111/j.1574-0862.2010.00516.x.

Full text not available from this repository.

Supplementary data:

Abstract

Increasing water scarcity combined with an increasing demand for food and water for irrigation call for a careful revision of water use in agriculture. Currently, less than 60 of all the water used for irrigation is effectively used by crops. Based on the new version of the GTAP-W model we analyze the effect of potential water savings and the welfare implications of improvements in irrigation efficiency worldwide. The results show that a water policy directed to improve irrigation efficiency led to global and regional water savings, but it is not beneficial for all regions. The final effect on regional welfare will depend on the interaction of several different causes. For instance, higher irrigation efficiency changes opportunity costs and reverses comparative advantages, modifying regional trade patterns and welfare. For water-stressed regions the effects on welfare are mostly positive. For nonwater scarce regions the results are more mixed and mostly negative. The results show that exports of virtual water are not exclusive of water abundant regions.

Document Type: Article
Keywords: D58 Q17 Q25 Computable general equilibrium Irrigation Water policy Water scarcity Irrigation efficiency economic-impact virtual water efficiency performance systems trade wheat china
Research affiliation: Kiel University
Refereed: Yes
DOI etc.: 10.1111/j.1574-0862.2010.00516.x
ISSN: 0169-5150
Date Deposited: 01 Nov 2012 04:55
Last Modified: 23 Jan 2013 10:03
URI: http://oceanrep.geomar.de/id/eprint/16943

Actions (login required)

View Item View Item