Water uses and productivity of irrigation systems |
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Authors: | A J Clemmens D J Molden |
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Institution: | (1) U.S. Arid Land Agricultural Research Center, Maricopa, AZ 85239, USA;(2) Comprehensive Assessment of Water Management in Agriculture, International Water Management Institute, Colombo, Sri Lanka |
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Abstract: | Reducing overall water diversions for agriculture, while maintaining or increasing production to keep up with increasing world
population, has been and will continue to be a challenge. Yet there is not good agreement regarding the programs needed to
improve the productivity of agricultural water use, nor what increases are feasible. It is recognized that field irrigation
is inherently nonuniform. So also is the distribution of water to users and water delivery service nonuniform. Here, we suggest
that crop-scale irrigation uniformity can be examined at a project scale by understanding how field, farm and project irrigation
systems contribute to nonuniformity. We also discuss the interrelation between project scale uniformity and the relative irrigation
water supply, and their combined impact on project productivity. We provide an example which relates internal measures of
project performance (e.g., water distribution operations) and external measures of project performance (e.g., project-wise
water productivity). |
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Keywords: | |
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