Wind, Sprinkler Patterns, and System Design

by Ido Seginer, Assoc. Prof.; Faculty of Agricultural Engrg., Technion, Haifa, Israel,
Mordekhai Kostrinsky, Agr. Engr.; Hamadya, Beit She'an, Israel,

Serial Information: Journal of the Irrigation and Drainage Division, 1975, Vol. 101, Issue 4, Pg. 251-264

Document Type: Journal Paper


Sprinkler water distribution data were analyzed to show the distorting effect of wind on the distribution pattern. It was found that the drift loss was neglible, and that the wind did not have a significant direct effect on the evaporative water loss. The individual distribution patterns were then reconstructed to a state of no-loss, exhibiting the now isolated distortion effect. The reconstructed patterns were used to test computationally an intuitive design rule which states: To produce the best possible water distribution under the major constraints of a given sprinkling system, the centers-of-mass of the individual water distribution patterns (rather than the sprinklers themselves) should be equidistantly spaced in the field. Three design examples seeking optimal lateral direction, operation-shift timing, and distance between lateral working positions were worked out. The resulting designs were checked by means of a detailed superposition program and found to be very close to the optima.

Subject Headings: Wind engineering | Water supply systems | Hydrologic data | Evaporation | Distortion (structural) | Computing in civil engineering | Field tests

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