Alternative reference evapotranspiration methods for the main climate types of the state of Paraná, Brazil

Bruno César Gurski, Daniela Jerszurki, Jorge Luiz Moretti de Souza

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


The objective of this work was to define the best alternative methods for estimating the reference evapotranspiration (ETo) in the main climatic types (Cfa and Cfb) of the state of Paraná, Brazil. The methods tested were Budyko, Camargo, Hargreaves-Samani, Linacre, and Thornthwaite, which were compared to the ETo calculated with the Penman-Monteith ASCE (EToPM) method, between 1986 and 2015, in eight meteorological stations. The performance of the alternative methods was obtained from the coefficient of determination (R2), index "d" of agreement, index "c" of performance, and root mean square error (RMSE). The Hargreaves-Samani method has a better performance in estimating the ETo for the main climatic types in the state of Paraná. The Camargo method allows smaller errors between the standard values of ETo, obtained with the Penman-Monteith method, and the estimated values. The methods of Thornthwaite, Linacre, and Budyko are not adequate to estimate the ETo in any climatic type of the state of Paraná, Brazil.

Original languageEnglish
Pages (from-to)1003-1010
Number of pages8
JournalPesquisa Agropecuaria Brasileira
Issue number9
StatePublished - 1 Sep 2018


  • Balanço hídrico
  • Climate variability
  • Dados climáticos faltantes
  • Irrigation management
  • Manejo da irrigação
  • Missing climate data
  • Modelos simplificados
  • Penman Monteith
  • Penman Monteith
  • Simplified models
  • Variabilidade climática
  • Water balance

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Agronomy and Crop Science


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