Performance of different methods for reference evapotranspiration estimation in Jaíba, Brazil

Silva, Gustavo H. da; Dias, Santos Henrique Brant; Ferreira, Lucas Borges; Santos, Jannaylton Éverton Oliveira; Cunha, Fernando França da

doi:10.1590/1807-1929/agriambi.v22n2p83-89

Cited by 12 publications

(8 citation statements)

References 16 publications

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“…Furthermore, regardless the under and overestimation of ETo, studies developed in Australian territory have shown that methods that use only temperature variables tend to overestimate ETo values without following a pattern (DONOHUE et al, 2010). The same point was verified for the region of Minas Gerais, in central Brazil (SILVA et al, 2018). Penman, Priestley & Taylor, and Hargreaves & Samani were better adjusted (R²) in these conditions than in the Brazilian Cerrado (GOTARDO et al, 2016).…”

Section: Eto Empirical Models Estimatesmentioning

confidence: 73%

Reference crop evapotranspiration in distinct agricultural regions of Southern Brazil: a comparison of improved empirical models

Santos

Castro

Oro

et al. 2021

Reveng

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The FAO56 Penman-Monteith model is globally accepted for the accurate determination of reference evapotranspiration (ETo). However, a lack of appropriate data encouraged the improved model’s approach to estimate ETo. This study compared the performance of 10 empirical models of ETo estimation (Penman, Priestley & Taylor, Tanner & Pelton, Makkink, Jensen & Haise, Hargreaves & Samani, Camargo, Benevides & Lopes, Turc, and Linacre) contrasted with the FAO56 model in two regions in Southern Brazil. Data were collected from automatic stations of the Brazilian National Institute of Meteorology (INMET) from December 21, 2019, to February 28, 2021. The determination coefficient (R²), mean square error (nRMSE), mean bias error (MBE), Willmott index (d), and Pearson’s correlation coefficient (r), clustering, and Principal Component Analysis (PCA) were performed. For the different regions, the radiation-based model proposed by Penman was the best alternative for estimating ETo. The model showed the most appropriated values for R2 (0.9015) and r (0.9494). The clustering and PCA analyses indicated the interrelations of the meteorological data and the combination of the models according to the parameters used for the determination of ETo.

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Section: Eto Empirical Models Estimatesmentioning

confidence: 73%

Reference crop evapotranspiration in distinct agricultural regions of Southern Brazil: a comparison of improved empirical models

Santos

Castro

Oro

et al. 2021

Reveng

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“…As variações na radiação solar incidente (4,6 a 54,0 MJ m -2 d -1 ), com média igual a 35,9 MJ m -2 d -1 , aconteceram, principalmente, na ocorrência de chuvas (Figura 2). Isto refletiu diretamente na evapotranspiração de referência (1,3 a 9,6 mm d -1 ) (Figura 2), com valor médio de 6,7 mm d -1 , visto que, a radiação solar é o elemento meteorológico de maior relevância na evapotranspiração (SILVA et al, 2018).…”

Section: Resultsunclassified

Produtividade Do Amendoim Submetido a Lâminas De Irrigação E Sistemas De Preparo Do Solo

Prado¹,

Mahl²,

Tinos³

et al. 2021

Enci Bio

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trabalho licenciado sob licença Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. RESUMOA cultura do amendoim tem sido uma alternativa para melhorar a renda do produtor e, devido à fixação biológica de nitrogênio, possibilita reduzir a quantidade de adubo nitrogenado em cultivos subsequentes. Com o objetivo de avaliar a produtividade do amendoim submetido a diferentes lâminas de irrigação e condições de mobilização do solo, desenvolveu-se um experimento em solo arenoso, no munícipio de Cidade Gaúcha/PR. Empregou-se o delineamento experimental em faixas, com quatro repetições, sendo o fator sistema de cultivo (com e sem mobilização do solo) na parcela e o fator lâmina de irrigação (I0 = 0%; I1 = 22%; I2 = 64%; I3 = 100% e; I4 = 175%) na subparcela. A lâmina líquida (IL) de irrigação para elevar a umidade do solo à capacidade de campo foi definida como o tratamento I3 (100% da IL). A produtividade de amendoim com e sem casca foi estimada para a umidade de 8%, em base úmida. Concluiu-se que, a interação entre os sistemas de preparo do solo e lâminas de irrigação não proporcionou respostas significativas em termos de produtividade de amendoim; o sistema de preparo do solo com mobilização proporcionou maior produtividade de amendoim que o sistema sem revolvimento do solo; a produtividade do amendoim apresentou resposta quadrática às lâminas de irrigação aplicadas, e; quando o custo do milímetro de água for 13 vezes maior que o custo do quilograma do amendoim, a irrigação não traz retorno econômico.

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“…However, according to Cunha et al ( 2013), the method constants were obtained for the conditions of the state of Wisconsin, United States, which is the probable reason for the poor performance found here. Different results were obtained by Silva et al (2018) who, evaluating evapotranspiration estimation methodologies in Jaíba (MG) obtained very good performance with this method.…”

Section: Reference Evapotranspiration For Days Without Precipitationmentioning

confidence: 90%

Comparison of reference evapotranspiration estimation methods, on days with and without precipitation

Lima

Moraes

Damascena

et al. 2021

Rev. Sci. Agr. Paranaensis

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Water is gradually becoming scarcer and more expensive. Therefore, any means that aims at a more efficient use of this substance in the most diverse sectors, becomes essential. In this context, the accurate estimation of evapotranspiration is of fundamental importance. With this in mind, the objective of this work was to compare the performance of different methodologies for estimating reference evapotranspiration in relation to the FAO Penman-Monteith method on days with and without precipitation in the region of Cambará do Sul/RS. To achieve this goal, daily data on maximum air temperature (°C), minimum temperature (°C), relative air humidity (%), dew point temperature (°C), wind speed at 2 m high (m s-1), atmospheric pressure (hPa) and global solar radiation (MJ m-2 d-1), were acquired from the automatic weather station located in Cambará do Sul/RS and divided into two sets (days with and without precipitation ). The comparison between the different methodologies and the standard method, for each period mentioned above, took place through a simple linear regression analysis to obtain the regression coefficients a and b and the determination coefficient. Subsequently, Pearson's correlation coefficient, root of the mean square of the error, Willmott index and the Camargo and Sentelhas index were calculated . For the municipality of Cambará do Sul/RS to replace the Penman-Monteith method, we recommend the use of the Penman and Makkink methods, which presented satisfactory performance in all periods analyzed.

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Performance of different methods for reference evapotranspiration estimation in Jaíba, Brazil

Cited by 12 publications

References 16 publications

Reference crop evapotranspiration in distinct agricultural regions of Southern Brazil: a comparison of improved empirical models

Reference crop evapotranspiration in distinct agricultural regions of Southern Brazil: a comparison of improved empirical models

Produtividade Do Amendoim Submetido a Lâminas De Irrigação E Sistemas De Preparo Do Solo

Comparison of reference evapotranspiration estimation methods, on days with and without precipitation

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