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Sprinkler evaporation losses in alfalfa during solid-set sprinkler irrigation in semiarid areas

AuthorsStambouli, Talel; Martínez-Cob, Antonio CSIC; Faci González, José María; Howell, Terry A.; Zapata Ruiz, Nery CSIC ORCID
Issue Date1-Sep-2013
CitationStambouli T, Martínez-Cob A, Faci JM, Howell T, Zapata N. Sprinkler evaporation losses in alfalfa during solid-set sprinkler irrigation in semiarid areas. Irrigation Science 31 (5): 1075-1089 (2013)
AbstractGross sprinkler evaporation losses (SELg) can be large and decrease irrigation application efficiency. However, it is not universally established how much of the SELg contributes to decrease the crop evapotranspiration during the sprinkler irrigation and how much are the net sprinkler losses (SELn). The components of SEL were the wind drift and evaporation losses (WDEL) and the water intercepted by the crop (IL). The gross WDEL (WDELg) and evapotranspiration (ET) were measured simultaneously in two alfalfa (Medicago sativa L.) plots, one being irrigated (moist, MT) and the other one not being irrigated (dry, DT). Catch can measurements, mass gains and losses in the lysimeters and micrometeorological measurements were performed to establish net WDEL (WDELn) during the irrigation and net IL (ILn) after the irrigation as the difference between ETMT and ETDT. Also, equations to estimate ILn and net sprinkler evaporation losses (SELn) were developed. ILn was strongly related to vapor pressure deficit (VPD). SELn were 8.3% of the total applied water. During daytime irrigations, SELn was 9.8% of the irrigation water and slightly less than WDELg (10.9%). During nighttime irrigations SELn were slightly greater than WDELg (5.4% and 3.7%, respectively). SELn was mainly a function of wind speed.
Description49 Pags., 3 Tabls., 6 Figs. The definitive version is available at: http://link.springer.com/journal/271
Publisher version (URL)http://dx.doi.org/10.1007/s00271-012-0389-2
Appears in Collections:(EEAD) Artículos
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