Abstract

Reliable measures of climate variables and the availability of alternative and safe methods are fundamental in estimating reference evapotranspiration (ETo) under unfavorable technical and financial conditions. The objective of this study was to evaluate the performance of the reference evapotranspiration estimation, in hourly periodicity, using the Moretti-Jerszurki-Silva models (ETo(MJS(psi air)); ETo(MJS(psi air;Ra))), which considers air temperature (T) and relative air humidity (RH) data measured in an alternative station. The calibration and validation of the alternative station measurements were performed using data from automatic meteorological stations in Curitiba in Paran' (climate type Cfb) and Santa Rita de Cassia in Bahia (climate type Aw), Brazil. The use of the alternative station for hourly measurements of air temperature and relative air humidity in the analyzed climate types and locations were promising. The Moretti-Jerszurki-Silva models were robust in the analyzed locations, indicating satisfactory performance for the hourly periodicity. The Moretti-Jerszurki-Silva method that uses atmospheric water potential and solar radiation (ETo(MJS(psi air;Ra))) provided better adjustments and estimates of the hourly reference evapotranspiration, as opposed to the standard Penman-Monteith model.

Keywords

water relations; water requirements; alternative methods; weather stations

Published in

Revista Brasileira de Engenharia Agrícola e Ambiental
2021, Volume: 25, number: 8, pages: 505-513
Publisher: UNIV FEDERAL CAMPINA GRANDE

UKÄ Subject classification

Meteorology and Atmospheric Sciences


Publication identifier

DOI: https://doi.org/10.1590/1807-1929/agriambi.v25n8p505-513

Permanent link to this page (URI)

https://res.slu.se/id/publ/121763