Physical and economic efficiency of water use in the river basin: Implications for efficient water management

Water Resources Research - Tập 39 Số 1 - 2003
Ximing Cai1,2, Mark W. Rosegrant1,2, Claudia Ringler2
1Also at International Water Management Institute, Colombo, Sri Lanka.
2International Food Policy Research Institute, Washington, D.C., USA

Tóm tắt

With growing water scarcity and increasing competition across water‐using sectors, the need for water savings and more efficient water use has increased in importance in water resources management. Improvement in the physical efficiency of water use is related to water conservation through increasing the fraction of water beneficially used over water applied, while enhancing economic efficiency is a broader concept, seeking the highest economic value of water use through both physical and managerial measures. Physical and economic efficiency measures are both useful indicators for water management at the irrigation system and river basin level. However, the relationship between physical efficiency and economic efficiency is not always clear, and the values of these measures may indicate different directions for water policy and investments in irrigation. Open research questions include, for example, the following: How does the change in responsiveness of water allocation and irrigation technology to economic incentives affect physical and economic irrigation efficiency? What is the impact of a change in irrigation system efficiency on basin physical and economic efficiency? How do changes in water withdrawals affect basin physical and economic efficiency under a given water requirement? To explore these issues, an integrated economic‐hydrologic river basin model is applied to the Maipo River Basin in Chile. A series of modeling scenarios is defined, and policy implications based on changes in physical and economic efficiencies for basin‐wide irrigation water management are analyzed.

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Tài liệu tham khảo

Antle J. M., 1993, Agricultural and Environmental Resources Economics, 175

10.1016/S0378-3774(98)00125-5

10.1061/(ASCE)0733-9437(1997)123:6(423)

10.1029/2001WR000214

Cai X., 2002, Sustainability analysis for irrigation water management in the Aral Sea region, Agric. Syst.

Cummings R. G., 1989, The use of the water pricing as a means for enhancing water use efficiency in irrigation: Case studies in Mexico and the United States, Nat. Resour. J., 32, 731

10.1007/BF00208397

10.1016/S0378-3774(98)00107-3

Jensen M. E., 1990, Irrigation of Agricultural Crops, 31

Keller J., 1992, Roundtable on Egyptian Water Policy, 20

A. A. Keller J. Keller 1995 Cent. for Econ. Policy Stud. Winrock Int Morrilton Ark.

Keller A. A. J.Keller andD.Seckler Integrated water resources systems: Theory and policy implication Res. Rep. 3 Int. Water Manage. Inst. Colombo Sri Lanka 1996.

Loeltz O. J. andS. A.Leake A method for estimating groundwater‐water return flow to the lower Colorado river in the Yuma area Arizona and California U.S. Geol. Surv. Water Resour. Invest. Rep. 83‐4220 86 pp. 1983.

D. Molden 1997 Int. Water Manage. Inst. Colombo Sri Lanka

10.1080/07900629948934

10.1111/j.1467-8489.1981.tb00398.x

10.1111/j.1574-0862.2000.tb00091.x

Seckler D. The new era of water resources management: From “dry” to “wet” water savings Res. Rep. 1 Int. Water Manage. Inst. Colombo Sri Lanka 1996.

Sutton B. G., 1994, Is water use efficiency an outmoded concept in irrigation scheduling?, Aspects Appl. Biol., 38, 311

10.1098/rstb.1997.0073

Wallace J. S. andC. H.Batchelor Water resources and their use in food production systems Invited paper presented atthe Open Science Conference of IGBP IHDP and WCRP Int. Geosphere‐Biosphere Program Amsterdam July2001.

10.1080/07900629948754

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Water Resources Research

Tập 39 Số 1

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