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Evapotranspiration mapping of cotton fields in Brazil: comparison between SEBAL and FAO-56 method

2021; Taylor & Francis; Volume: 37; Issue: 17 Linguagem: Inglês

10.1080/10106049.2021.1920633

1752-0762

Juan Vicente Liendro Moncada, Tonny José Araújo da Silva, Jefferson Vieira José, Edna Maria Bonfim-Silva, William Fenner, Niclene Ponce Rodrigues de Oliveira,

Irrigation Practices and Water Management

The objective was to compare the evapotranspiration of cotton (Gossypium sp. L.) estimated by the SEBAL model and the FAO-56 method, throughout the phenological cycle of the plant on eight fields located in the upper area of the Rio das Mortes basin, State of Mato Grosso—Brazil. Images from the Landsat 8 satellite were used under the Geographic Information Systems environment through the capabilities of the QGIS 3.6.2 and GRASS 7.6.1 software. The reference evapotranspiration was determined by the FAO Penman–Monteith method implementing the Ref-ET software and data from the Campo Verde meteorological station of INMET—Brazil. The R software was applied to the statistical analyses of correlation and regression. The dataset of the available stages of the cotton phenological cycle shows a strong positive correlation, with approximately 68% of the evapotranspiration variation of the SEBAL model related to the estimates of the FAO-56 method.