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Jul 9, 2014

Erratum for “Field-Scale Sprinkler Irrigation System Hydraulic Model. I: Hydraulic Characterization” by D. Zerihun, C. A. Sanchez, and K. Nolte

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Publication: Journal of Irrigation and Drainage Engineering
Volume 140, Issue 10
Please note a few corrections to the text and Table 1 of this article.
Table 1. Input Data Used for Model Evaluation and Sensitivity Analysis
Type of input dataUnitModel evaluation
Sprinkler spacingm9.14
Coefficient of sprinkler q(hs) function, α1, Eq. (12)L/s/mα20.0125
Exponent of sprinkler q(hs) function, α2, Eq. (12)0.521
Minimum sprinkler pressure headm55.0
Lateral spacingm10.67
Lateral lengthm374.7
Lateral diameteramm76.2
Lateral slopeb0.0004/0.0006
Mainline lengthm148.2
Mainline diametermm203.2
Mainline slope0.0001
Absolute roughness of pipe for Darcy-Weisbach equation (aluminum pipe)cmm0.127
Local head loss coefficient at lateral and sprinkler riser coupling
 Branch flow1.3
 Line flow0.7
Local head loss coefficient at mainline and lateral coupling
 Branch flow1.0
 Line flow0.5
a
Lateral diameters of 63.5 mm and 44.5 m were used in sensitivity analyses computations.
b
Lateral slopes of 0.0 and 0.3% were used in sensitivity analyses.
c
Lateral and mainline absolute roughness of 0.254 and 0.508 were used in sensitivity analyses.
In the text following Eq. (27), the expression “2(N1)” should be replaced with “N1.” The revised sentence should read, “When coupled with known boundary conditions at the upper and lower limits of the interval, [Hmin; Hmax], the linear system of equations [Eqs. (24)–(26)] reduces to a form [with (N1) equations in (N1) unknowns] that can be solved simultaneously.”

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Go to Journal of Irrigation and Drainage Engineering
Journal of Irrigation and Drainage Engineering
Volume 140Issue 10October 2014

History

Received: Jun 12, 2014
Accepted: Jun 16, 2014
Published online: Jul 9, 2014
Published in print: Oct 1, 2014
Discussion open until: Dec 9, 2014

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Authors

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Associate Research Scientist, Maricopa Agricultural Center, Univ. of Arizona, 37860 W. Smith-Enke Rd., Maricopa, AZ 85238-3010. E-mail: [email protected]
C. A. Sanchez [email protected]
Professor, Dept. of Soil, Water, and Environmental Science and Maricopa Agricultural Center, Univ. of Arizona, 37860 W. Smith-Enke Rd., Maricopa, AZ 85238-3010 (corresponding author). E-mail: [email protected]
K. Nolte
Director, Yuma Agricultural Center, Univ. of Arizona, 6425 W 8th St., Yuma, AZ 85364.

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