Comparative performance of empirical methods to estimate the reference evapotranspiration in Aquidauana, MS, Brazil

Autores

  • Taynara da Silva Moraes UEMS
  • Carla Deisiane de Oliveira Costa Universidade Estadual de Mato Grosso do Sul
  • Adriano da Silva Lopes UEMS
  • Eder Duarte Fanaya Júnior UEMS
  • Vitor Gabriel Marinho de Faria Pereira UEMS
  • Carla Deisiane de Oliveira Costa UEMS
  • Uilhiam Cherri UEMS

DOI:

https://doi.org/10.15361/1984-5529.2018v46n2p143-150

Palavras-chave:

Penman-Monteith equation, climatic elements, irrigation management

Resumo

Estimating the reference evapotranspiration is quite useful when managing irrigation, as before picking the right method; it is necessary to analyse local’s climatic conditions. Therefore, the aim of this study was to evaluate the performance of empirical methods to estimate ET0, comparing them with FAO reference evapotranspiration from Penman-Monteith equation, for the region of Aquidauana, Brazil. The empirical methods used were Camargo (CM), Hargreaves-Samani (HS), Jensen-Haise (JH) and Priestley & Taylor (PT). The climatic variables were obtained from a station of the National Institute of Meteorology (INMET), located in Aquidauana, MS, collected between January of 2008 and December of 2014. In order to compare the values of ET0 obtained from the empirical equations with the standard method of Penman-Monteith, it was considered the following parameters: regression equation (a and b), coefficient of determination (r2), Willmott’s index (d) and C-index (c), as both for dry and rainy period. The method of Priestley & Taylor was the one that presented the closest value to Penman-Monteith equation, followed by the method of Jensen-Haise. The methods of Hargreaves-Samani and Camargo are not recommended to the region of Aquidauana, MS.

Biografia do Autor

Taynara da Silva Moraes, UEMS

Graduação em Engenharia Florestal

Carla Deisiane de Oliveira Costa, Universidade Estadual de Mato Grosso do Sul

Pós doutoranda da Universidade Estadual de Mato Grosso do Sul

Adriano da Silva Lopes, UEMS

Prof. Dr. Adjunto da Universidade Estadual de Mato Grosso do Sul – UEMS

Eder Duarte Fanaya Júnior, UEMS

Doutorando do programa de pós-graduação em Engenharia de Sistemas Agrícolas, departamento de Engenharia de Biossistemas

Vitor Gabriel Marinho de Faria Pereira, UEMS

Mestrado em Produção vegetal pela Universidade Estadual de Mato Grosso do Sul – UEMS

Carla Deisiane de Oliveira Costa, UEMS

Pós doutoranda do programa de pós-graduação em Produção Vegetal pela Universidade Estadual de Mato Grosso do Sul – UEMS

Uilhiam Cherri, UEMS

Graduação em Engenharia Florestal pela Universidade Estadual de Mato Grosso do Sul – UEMS

Publicado

14/05/2018

Edição

Seção

Irrigação e Drenagem