REFERENCE EVAPOTRANSPIRATION ESTIMATION (ETo) BY DIFFERENT EMPIRICAL FORMULAS IN THE MUNICIPALITY OF CONFRESA-MT

• Autor(a) principal: Silva, Kleber Oliveira da
• Data de Publicação: 2022
• Outros Autores: SantAna, José Antonio do Vale, Silva Júnior , João José da, Castro , Yuri de Oliveira
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista PesquisAgro
• Texto Completo: http://periodicos.cfs.ifmt.edu.br:443/periodicos/index.php/agro/article/view/1100
• topic: Irrigation management; water requirements; Meteorological station; empirical methods.; Manejo de irrigação; necessidade hídrica; estação meteorológica; métodos empíricos.

Reference evapotranspiration (ETo) is important for irrigated agriculture since from its relationship with the Kc of the culture determines the Evapotranspiration of culture (ETc). The Food and Agriculture Organization of the United Nations (FAO) established the Penman Monteith method for estimating ETo as a standard, but there are different empirical formulas for this application, so the present work aims to evaluate the evapotranspiration estimate of reference (ETo) by different empirical formulas in the municipality of Confresa-MT. These models were used to estimate ETo because it requires few meteorological elements, compared to the standard method. The climatological data used for the present work were obtained by the meteorological station installed in the experimental area of ​​the IFMT- Campus Confresa. The evaluated methods vary from the standard (FAO-56), so they need a correction factor for more precise determination in the region of Confresa-MT. The Hargreaves-Samani method is the one with the best performance and consequently the lowest correction factor for estimating reference evapotranspiration (ETo). The Jensen-Haise method presents a second option for estimating reference evapotranspiration (ETo) for the municipality of Confresa-MT with satisfactory performance and very similar to the Hargreaves-Samani method.