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Kinetic energy in sprinkler irrigation: different sources of drop diameter and velocity

AuthorsBautista-Capetillo, Carlos F.; Zavala, M.; Playán Jubillar, Enrique CSIC ORCID
Keywordskinetic energy
drop diameter
drop velocity
indoor experiments
sprinkler irrigation
low-speed photography
Issue DateJan-2012
CitationBautista-Capetillo C, Zavala M, Playán E. Kinetic energy in sprinkler irrigation: different sources of drop diameter and velocity. Irrigation Science 20 (1): 29-41 (2012)
AbstractSprinkler kinetic energy has been linked to a number of problems in irrigated fields. This work presents the characterization of sprinkler drop kinetic energy and specific power from low-speed photographic drop data using a commercial impact sprinkler and three operating pressures. The spatial variability of specific power (W m−2) was assessed for different sprinkler spacings, showing different patterns in rectangular and triangular spacings. The specific power uniformity coefficient ranged from 38–77%, depending on sprinkler spacing and operating pressure. An attempt was made to characterize specific power from estimated (measured diameter and estimated velocity) and simulated data (using a ballistic model). While estimated data produced adequate results, simulated data resulted in a large overestimation. Discrepancies in kinetic variables between measured and simulated drop data permit to conclude that it is important to continue experimental drop characterization efforts as well as sprinkler simulation model development.
Description44 Pags., 5 Tabls., 7 Figs. The definitive version is available at:
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