PERFORMANCE OF THE “IRRIGÂMETRO” AND METHODS TO ESTIMATE THE EVAPOTRANSPIRATION OF REFERENCE FOR THE GUANAMBI-BA CITY

Authors

  • Cristiano Tagliaferre
  • Izaulto José dos Santos Neto
  • Carlos Elízio Cotrim
  • Lucas da Costa Santos
  • Felizardo Adenilson Rocha

DOI:

https://doi.org/10.13083/reveng.v20i6.306

Keywords:

manejo de irrigação, métodos empíricos, irrigâmetro

Abstract

The objective of this work was to evaluate the performance of the Irrigameter and methods to estimate the evapotranspiration of reference, with the method of Penman-Monteith - FAO 56. To the estimate of the ET0 by empirical methods it was obtained climatic data of an automatic meteorological station installed in the Campus of the Federal Institute of Bahia, located in the city of Guanambi - BA. To estimate the ET0 through Irrigameter, it was used six equipments with levels of water within the evaporation pot equal to 3 and 4 cm, which took place in the daily readings of evaporated lamina water. To compare the values of ET0 measured in Irrigameter with those estimated by empirical equations with the standard method Penman-Monteith (FAO56) it was considered the parameters of the regression equation (a and b), the determination coefficient (r²), the estimative of standard error (EEP), the index of agreement (d), index of confidence or performance (c). The best methods to estimate evapotranspiration of reference were: Radiation - FAO 24, Modified Penman - FAO 24 and Irrigameter operating with equal water level to 3 cm.

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Published

2012-12-27

How to Cite

Tagliaferre, C., Santos Neto, I. J. dos, Cotrim, C. E., Santos, L. da C., & Rocha, F. A. (2012). PERFORMANCE OF THE “IRRIGÂMETRO” AND METHODS TO ESTIMATE THE EVAPOTRANSPIRATION OF REFERENCE FOR THE GUANAMBI-BA CITY. Engineering in Agriculture, 20(6), 544–553. https://doi.org/10.13083/reveng.v20i6.306

Issue

Vol. 20 No. 6 (2012)

Section

Agricultural Meteorology

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