2020
DOI: 10.5039/agraria.v15i1a7661
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Performance of solar radiation models for obtaining reference evapotranspiration to Santa Maria-RS, Brazil

Abstract: In the absence of observed data from Solar radiation (Sr), it is possible to estimate it using mathematical models. In general, the models vary in degree of complexity and the adjustment coefficients, and these must be calibrated to the place of interest to obtain the best performance. In this regard, the present work aims to evaluate the performance of simplified models of solar radiation in obtaining reference evapotranspiration. The data were obtained from the automatic meteorological station of the Nationa… Show more

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“…One significant part of the hydrological cycle is the evapotranspiration (ET) process that is widely used for agricultural, irrigation management, and water resources planning 3 . The R s is the primary input variable in the calculation of ET 4 . Concerning to the cost and the maintenance and calibration requirements of the R s estimating instrument, missing data, or due to instrument failure or other related problems, it might be that the estimates of R s are not available in several regions 5 .…”
Section: Introductionmentioning
confidence: 99%
“…One significant part of the hydrological cycle is the evapotranspiration (ET) process that is widely used for agricultural, irrigation management, and water resources planning 3 . The R s is the primary input variable in the calculation of ET 4 . Concerning to the cost and the maintenance and calibration requirements of the R s estimating instrument, missing data, or due to instrument failure or other related problems, it might be that the estimates of R s are not available in several regions 5 .…”
Section: Introductionmentioning
confidence: 99%