Characterization of Rainfall under Center Pivot: Influence of Measuring Procedure
Publication: Journal of Irrigation and Drainage Engineering
Volume 121, Issue 5
Abstract
A simulation model of rainfall under center pivots was used to elevate center-pivot testing procedures. The model calculates rainfall parameters such as weighted mean and uniformity coefficient for various scenarios including the case of a voluntarily disrupted machine. Observed variations in rainfall parameters suggested modifications to standard procedures in order to improve accuracy. Those modifications include staggering rain-gauge position on the two radii of measure and a uniformity coefficient derived from a coefficient of variation calculated on weighted values, theoretically more sensitive than existing approaches. Such a procedure has been proposed as an improvement over the draft international standard ISO/TC23/SC18/DIS 11545, “Agricultural Irrigation Equipment—CentrePivot and Moving Lateral Irrigation Machines Equipped with Sprayer or Sprinkler Nozzles—Determination of Uniformity of Water Distribution.”
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References
1.
Bittenger, M. W., and Logenbraugh, R. A.(1962). “Theoretical distribution of water from a moving irrigation sprinkler.”Trans. ASAE, 5(1), 26–30.
2.
Christiansen, J. E. (1942). “Irrigation by sprinkling.”Bull. No. 670, California Agric. Experiment Station, Univ. of California, Berkeley, Calif.
3.
Duke, H. R., Heermann, D. F., and Dawson, L. J. (1991). “Selection of appropriate applied depth from centre pivots.”ASAE Paper No. SW91-2052, Am. Soc. of Agric. Engrs., St. Joseph, Mich.
4.
Heermann, D. F., and Hein, P. R.(1968). “Performance characteristics of self-propelled centre pivot sprinkler irrigation systems.”Trans. ASAE, 11(1), 11–15.
5.
Heermann, D. F., and Swedensky, D. L. (1984). “Simulation analysis of centre pivot sprinkler uniformity.”ASAE Paper No. 84-2582, Am. Soc. of Agric. Engrs., St. Joseph, Mich.
6.
Heermann, D. F., Duke, H. R., and Dawson, L. J. (1991). “Distribution functions to represent centre pivot water distribution.”ASAE Paper No. SW91-2051, Am. Soc. of Agric. Engrs., St. Joseph, Mich.
7.
Karmeli, D.(1978). “Estimating sprinkler distribution patterns using linear regression.”Trans. ASAE, 21(4), 682–687.
8.
Kincaid, D. C.(1982). “Sprinkler patern radius.”Trans. ASAE, 25(6), 1668–1672.
9.
Marek, T. H., Undersander, D. J., and Ebeling, L. L.(1986). “An aerial weighted uniformity coefficient for centre pivot irrigation systems.”Trans. ASAE, 29(6), 1665–1667.
10.
Ring, L., and Heermann, D. (1978). “Determining centre-pivot sprinkler uniformities.”ASAE Paper No. 78-2001, Am. Soc. of Agric. Engrs., St. Joseph, Mich.
11.
Solomon, K., and Bezdek, J. C.(1980). “Characterising sprinkler distribution patterns with a clustering algorithm.”Trans. ASAE, 23(4), 899–906.
Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 121 • Issue 5 • September 1995
Pages: 347 - 353
Copyright
Copyright © 1995 American Society of Civil Engineers.
History
Published online: Sep 1, 1995
Published in print: Sep 1995
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