FAO Penman-Monteith equation for reference evapotranspiration from missing data
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Data
2013-10
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Resumo
The determination of the amount of water needed for crops is one of the main parameters for correct irrigation planning. In this
context the FAO Penman-Monteith method (FAO-PM) has been recommended as the best for the reference evapotranspiration
(ETo) estimates. However it is not always possible to have all the necessary data for its application; in this case, alternative criteria
must be used for this estimation. In this study, the objective was to estimate ETo by the FAO-PM method with only the maximum
and minimum temperature values, here called Simplified FAO-PM, and compare it to the standard method (FAO-PM) with all
input data, for Lavras, Minas Gerais State, Brazil. It was observed that the alternative method has the tendency to overestimate
the standard method, however, this approach is feasible to estimate ETo for irrigation scheduling in localities where not all input
data required for FAO-PM is available.
Descrição
Palavras-chave
Evapotranspiration estimate, Irrigation management, Minimum temperature, Maximum temperature, Estimación de evapotranspiración, Manejo del riego, Temperatura mínima, Temperatura máxima
Citação
CARVALHO, Luiz Gonsaga de; EVANGELISTA, Adão Wagner Pego; OLIVEIRA, Klerisson Milton Gontijo; SILVA, Bruno Montoani ; ALVES, Marcelo de Carvalho; SA JUNIOR, Arionaldo de; MIRANDA, Wezer Lismar. FAO Penman-Monteith equation for reference evapotranspiration from missing data. Idesia, Arica, v. 31, n. 3, p. 39-47, Sept./Oct. 2013.