Accuracy of Irrigation Efficiency Estimates
Publication: Journal of Irrigation and Drainage Engineering
Volume 123, Issue 6
Abstract
Evaluation of actual irrigation system performance should rely on an accurate hydrologic water balance over the area considered. In a companion paper, water uses are categorized as consumptive or nonconsumptive, and beneficial or nonbeneficial. Real performance is based on water uses over a specified period of time, rather than observation of a single irrigation event (with associate potential, but not yet actual, consumptive and/or beneficial uses). Once the components in the water balance have been determined, it is shown that the accuracy of irrigation performance parameters can be determined from the accuracy of the components in the water balance, using standard statistical procedures. Accuracy is expressed in terms of confidence intervals. Equations, procedures, and examples are provided for making these calculations. It is recommended that confidence intervals be included in all reporting of irrigation system performance parameters.
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References
1.
Burt, C. M.(1997). “Irrigation performance measures: efficiency and uniformity.”J. Irrig. and Drain. Engrg., ASCE, 123(6), 423–442.
2.
Jensen, M. E., Burman, R. D., and Allen, R. G., eds. (1990). “Evapotranspiration and irrigation water requirements.”ASCE Manuals and Reports on Engineering Practice, American Society of Civil Engineers, New York, N.Y., No. 70.
3.
Ley, T. W., Hill, R. W., and Jensen, D. T.(1994). “Errors in Penman-Wright alfalfa reference evapotranspiration estimates. I: Model sensitivity analysis.”Trans. ASAE, 37(6), 1853–1861.
4.
Mood, A. M., Graybill, F. A., and Boes, D. C. (1974). Introduction to the theory of statistics, McGraw-Hill Inc., New York, N.Y.
5.
Pritsker, A. A. B. (1986). Introduction to simulation and slam II, 3rd Ed., John Wiley & Sons, Inc., New York, N.Y.
6.
Rhoades, J. D. (1974). “Drainage for salinity control.” Chap. 16 in Drainage for agriculture, Agronomy Monograph No. 17, American Society of Agronomy, Madison, Wisc.
7.
Styles, S. W. (1993). “On-farm irrigation efficiency.”Spec. Tech. Rep. for Imperial Irrigation District, Boyle Engineering Corp., Imperial, Calif.
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Copyright © 1997 American Society of Civil Engineers.
History
Published online: Nov 1, 1997
Published in print: Nov 1997
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