Estimation of potential evapotranspiration for Londrinha and Ponta Grossa, PR, Brazil

Authors

  • Paulo Henrique Caramori
  • Rogerio Teixeira de Faria

DOI:

https://doi.org/10.1590/S1678-3921.pab1987.v22.14178

Keywords:

reference evapotranspiration, agricultural climatology

Abstract

The Penman equation for potential evapotranspiration was simplified in the aerodynamic term, replacing that by Piche evaporation for Londrina and Ponta Grossa regions. Coefficients for monthly, Spring-Summer, Autumn-Winter and annual periods were estimated using ten-day data average. Comparison between original Penman and simplified equation for annual period showed excellent adjustment for both sites. The expressions obtained for ETP calculation were:

Londrina: ETP = (∆/∆+ɣ)(H/59) + (0.06 + 0.26 Epi)

Ponta Grossa: ETP = (∆/∆+ɣ) (H/59) + (0.13 + 0.33 Epi).

These equations make it possible to recover historical ETP data for crop water requirement calculation purposes.

 

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How to Cite

Caramori, P. H., & Faria, R. T. de. (2014). Estimation of potential evapotranspiration for Londrinha and Ponta Grossa, PR, Brazil. Pesquisa Agropecuaria Brasileira, 22(1), 9–13. https://doi.org/10.1590/S1678-3921.pab1987.v22.14178

Issue

v.22, n.1, jan. 1987

Section

CLIMATOLOGY