USE OF IRRIGAMETER TO ESTIMATE REFERENCE EVAPOTRANSPIRATION RATE BASED ON THE CONSTANT WATER TABLE LYSIMETER METHOD

Authors

  • Cristiano Tagliaferre
  • Rubnes Alves de Oliveira
  • Gilberto Chohaku Sediyama
  • Paulo Roberto Cecon
  • Franklin José Valbuena Materan

DOI:

https://doi.org/10.13083/reveng.v19i2.209

Keywords:

evaporímetro, manejo da irrigação, agricultura irrigada

Abstract

This work was carried out to evaluate the performance of an irrigameter to estimate the reference evapotranspiration rate (ET0) and compare it with the methods of FAO-Penman-Monteith, FAO-Modified Penman, FAO-Radiation, Hargreaves-Samani and Class A pan evaporation rate, relative to the constant water table lysimeter method. The ET0 data obtained after one, three, five and seven days, with the use of the irrigometer were compared with the measured values of the constant water table lysimeter, operating with the modified irrigometer. The irrigameter results were satisfactory to estimate ET0 in all time intervals studied, and similar to the method of Modified Penman – FAO 24. It was concluded that the irrigameter is reliable and can be used for irrigation water management, with the advantages of relatively low cost, highly practical and without involving complex calculations. The others methods overestimated ET0 compared to the method of constant water table lysimeter, and the Class A pan showed opposite behavior.

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Published

2011-04-14

How to Cite

Tagliaferre, C., Oliveira, R. A. de, Sediyama, G. C., Cecon, P. R., & Materan, F. J. V. (2011). USE OF IRRIGAMETER TO ESTIMATE REFERENCE EVAPOTRANSPIRATION RATE BASED ON THE CONSTANT WATER TABLE LYSIMETER METHOD. Engineering in Agriculture, 19(2), 152–163. https://doi.org/10.13083/reveng.v19i2.209

Issue

Vol. 19 No. 2 (2011)

Section

.

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