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- Title
COMPARAÇÃO DE MÉTODOS DE ESTIMATIVA DE ETO E ANÁLISE DE SENSIBILIDADE PARA DIFERENTES CLIMAS BRASILEIROS.
- Authors
ARAÚJO LIMA, JOÃO GUILHERME; CARNEIRO VIANA, PAULA; ESPÍNOLA SOBRINHO, JOSÉ; CHAVES COUTO, JOÃO PAULO
- Abstract
Estimation of reference evapotranspiration (ETo) is of great importance for agriculture and irrigation management. The Penman-Monteith method is considered standard for estimating ETo. However, because it is complete, the standard method presents as a disadvantage the need for a range of meteorological variables. The objective of this research was to evaluate the performance of Hargreaves-Samani, Makkink, Priestley-Taylor, Turc, FAO-24 and Blaney- Criddle methods for the climatic conditions of the six Brazilian regions. The verification of the performance of these models was made by comparison to the Penman-Monteith method. To evaluate the performance of the methods, the square root of mean-square error (MSE), mean absolute error (MAE), error of estimate (EE) and coefficient of determination (R²) were used. Among the methods studied, that of Turc was the one that presented the best results for all the climates of Brazil, except for the tropical coastal climate. The Makkink method was the one that presented the best result for the coastal tropical climate. Sensitivity analysis revealed that air temperature and global radiation are the most important variables for the Penman-Monteith method, except for BL municipality, where the variable relative humidity was the most important.
- Publication
Revista IRRIGA - Brazilian Journal of Irrigation & Drainage, 2019, Vol 24, Issue 3, p538
- ISSN
1413-7895
- Publication type
Article
- DOI
10.15809/irriga.2019v24n3p538-551