COMPARASION OF METHODS THE EVAPORATION REFERENCE (ETO) IN THE REGION OF PETROLINA-PE

Authors

  • Hérika Cavalcante Dantas da Silva UFRN
  • Madson Tavares Silva UFRN
  • Mislayne Mayana Moura Araújo Silva UFRN
  • Carlos Alberto Nascimento da Rocha Junior UFRN

DOI:

https://doi.org/10.5902/2179460X13154

Abstract

The study was aimed to estimate the reference evapotranspiration (ETo) daily for the region of Petrolina-PE, using data from the weather station Trough, inserted in the research unit of EMBRAPA-SEMIARID (CPATSA). Were used meteorological data for the year 2010 in the estimation methods of Penmam-Monteith-FAO (PM), of Linacre, Radiation and Class A pan. We adopted the method of PM as a parameter to evaluate the efficiency of other methods and the index (c) of Camargo and Sentelhas to evaluate their performance. For the method of PM was observed that in general the ETo values ​​show great variability throughout the year in the semiarid region of the state of Pernambuco, reaching present daily average values ​​between 3,0 and 8,0 mm day-1. According to the results it was observed that the methods of radiation and Linacre obtained satisfactory results, as the performance criterion, values ​​above 0,85 for c in the months of September to january. However, with respect to error on the PM, the Linacre method was very efficient for the study area, as there was a value 0,76%, while the method of the class A pan method showed the worst results, with an error around 12%. Have the method of radiation, despite the good performance coefficient showed underestimate the PM method, obtaining an error of -13%.

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Author Biography

Hérika Cavalcante Dantas da Silva, UFRN

Herika Cavalcante Dantas da Silva

Published

2014-11-14

How to Cite

Silva, H. C. D. da, Silva, M. T., Silva, M. M. M. A., & Rocha Junior, C. A. N. da. (2014). COMPARASION OF METHODS THE EVAPORATION REFERENCE (ETO) IN THE REGION OF PETROLINA-PE. Ciência E Natura, 36(2), 456–461. https://doi.org/10.5902/2179460X13154