The importance of irrigation throughout the world, but especially in Asia, makes clear the need for a more complete evaluation of its externalities. There is a growing interest in the evaluation of irrigation’s externalities or what is often referred to as “multifunctionality.The need for study on this issue comes from two directions. The first is related to the need to accurately consider the full value of the water resource, with a sustainable perspective, as decisions are made about use. The second is to identify the multiple values in terms of their beneficiaries, so that policies can be developed to equitably allocate costs of managing the water resource. For example, at least some part of governmental support to paddy farmers to more appropriately manage irrigation systems can be considered recognition of the positive functions associated with paddy irrigation that primarily benefit society, rather than the individual farmer. In addition to literature review and analysis of available valuing methodologies, this project looks at estimating the important externalities of Taiwan paddy irrigation using the Japanese methodology and the methodology that follows Randall’s approach. The specific objectives are to evaluate and estimate the values of the most important externalities in selected regions of Taiwan and Sri Lanka.
Collaborators: Agricultural Engineering Research Center (AERC), Taiwan; Cornell University; University of Minnesota.
Duration: 2001 to 2003
Chang, Hung-Hao, Richard N, Boisvert, David Blandford. Achieving Environmental Objectives Under Reduced Domestic Agricultural Support and Trade Liberalization: An Empirical Application to Taiwan Agricultural and Resource Economics Review, Apr 2005
Boisvert, RN, Chang HH. 2006. Multifunctional Agricultural Policy, Reduced Domestic
Support, and Liberalized Trade: An Empirical Assessment for Taiwanese Rice. Colombo, Sri
Lanka: International Water Management Institute. 44p. (Comprehensive Assessment of
Water Management in Agriculture Research Report 14)
Boisver, Richard N., and David Blandford. Multifunctionality and Non-trade Concerns: Implications for Future Agricultural Policy in Asia. Proceedings of the International Conference on Management of Paddy and Water Environment for Sustainable Rice Production (PAWEES), 7-8 September 2005 in Kyoto, Japan. p.46-51.
Levine, G, Chih-Hung Tan, Y. Matsuno, C-C. Huang and R. Barker. Protocols for Estimating Magnitudes and Values of Paddy Rice Multiple Functions. Proceedings of the International Conference on Management of Paddy and Water Environment for Sustainable Rice Production (PAWEES), 7-8 September 2005 in Kyoto, Japan. p.33-38.
Accounting of Agricultural and Nonagricultural Impacts of Irrigation and Drainage Systems. A Report of Research in Taiwan and Sri Lanka in 2003 . IWMI Working Paper 68, 2004
Matsuno, Y, HS Ko, CH Tan, R Barker, and G Levine, Accounting of Agricultural and Nonagricultural Impacts of Irrigation and Drainage Systems: A study of multifunctionality in rice, IWMI Working Paper 43, 2002
Matsuno, Yutaka, Accounting for Non Agricultural Impacts of Irrigation and Drainage System, paper presented at the 30th Anniversary of the Agricultural Engineering Research Institute, Taiwan, 2001
Levine, G., K.H. Sheng and R. Barker. 2000. The Evolution of Taiwanese Irrigation: Implications for the Future. Water Resources Development, Vol.16, 4, 497-510.
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