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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VIEW THE CORRECTED ARTICLEPublication: Journal of Irrigation and Drainage Engineering
Volume 140, Issue 10
Please note a few corrections to the text and Table 1 of this article.
Type of input data | Unit | Model evaluation |
---|---|---|
Sprinkler spacing | m | 9.14 |
Coefficient of sprinkler function, , Eq. (12) | 0.0125 | |
Exponent of sprinkler function, , Eq. (12) | — | 0.521 |
Minimum sprinkler pressure head | m | 55.0 |
Lateral spacing | m | 10.67 |
Lateral length | m | 374.7 |
Lateral diametera | mm | 76.2 |
Lateral slopeb | — | |
Mainline length | m | 148.2 |
Mainline diameter | mm | 203.2 |
Mainline slope | — | |
Absolute roughness of pipe for Darcy-Weisbach equation (aluminum pipe)c | mm | 0.127 |
Local head loss coefficient at lateral and sprinkler riser coupling | ||
Branch flow | — | 1.3 |
Line flow | — | 0.7 |
Local head loss coefficient at mainline and lateral coupling | ||
Branch flow | — | 1.0 |
Line flow | — | 0.5 |
a
Lateral diameters of 63.5 mm and 44.5 m were used in sensitivity analyses computations.
b
Lateral slopes of 0.0 and 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 “” should be replaced with “.” The revised sentence should read, “When coupled with known boundary conditions at the upper and lower limits of the interval, [; ], the linear system of equations [Eqs. (24)–(26)] reduces to a form [with () equations in () unknowns] that can be solved simultaneously.”
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© 2014 American Society of Civil Engineers.
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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