Analysis of reference evapotranspiration of Janaúba, mg

Knowledge of the reference evapotranspiration (ETo) is essential for the irrigation management of agricultural crops worldwide. The Penman Monteith demand different weather variables, which hinders its application in areas with few weather stations such as the north of Minas Gerais. This work, compa...

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Autores principales:	Mendes Reis,Matheus, Gonçalves Oliveira,Flávio, Gonçalves Lopes,Érika Manuela
Lenguaje:	English
Publicado:	Universidad de Tarapacá. Facultad de Ciencias Agronómicas 2016
Materias:	Penman Monteith Hargreaves Samani frequency of occurrence water agrometeorology
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292016000400009
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spelling	oai:scielo:S0718-342920160004000092017-03-23Analysis of reference evapotranspiration of Janaúba, mgMendes Reis,MatheusGonçalves Oliveira,FlávioGonçalves Lopes,Érika Manuela Penman Monteith Hargreaves Samani frequency of occurrence water agrometeorology Knowledge of the reference evapotranspiration (ETo) is essential for the irrigation management of agricultural crops worldwide. The Penman Monteith demand different weather variables, which hinders its application in areas with few weather stations such as the north of Minas Gerais. This work, compare the method of Hargreaves Samani with Penman Monteith and determine the frequency of occurrence of the reference evapotranspiration in the city of Janaúba, MG. To assess the fit of Hargreaves Samani equation with Penman Monteith used the coefficient of determination (r²), the coefficient of correlation (r), the standard error of estimate (SEE), the index agreement (d) and the index performance (c). Kimball's method was used for determining the frequency of occurrence. The results indicate that the Hargreaves Samani method overestimates the values of Penman Monteith at 8%, but in the monthly analysis, it is observed that between the months April to August Penman values were superior to Hargreaves. All statistical criteria used showed Hargreaves Samani fitted equation with a better assessment when compared with the Penman Monteith. The higher frequency of occurrence was between 4.5 and 4.7 mm day-1 (6.62%) and the equation that indicates the probability of being equaled or exceeded evaporation showed an r² equal to 0.9676.info:eu-repo/semantics/openAccessUniversidad de Tarapacá. Facultad de Ciencias AgronómicasIdesia (Arica) v.34 n.4 20162016-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292016000400009en10.4067/S0718-34292016005000017
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Penman Monteith Hargreaves Samani frequency of occurrence water agrometeorology
spellingShingle	Penman Monteith Hargreaves Samani frequency of occurrence water agrometeorology Mendes Reis,Matheus Gonçalves Oliveira,Flávio Gonçalves Lopes,Érika Manuela Analysis of reference evapotranspiration of Janaúba, mg
description	Knowledge of the reference evapotranspiration (ETo) is essential for the irrigation management of agricultural crops worldwide. The Penman Monteith demand different weather variables, which hinders its application in areas with few weather stations such as the north of Minas Gerais. This work, compare the method of Hargreaves Samani with Penman Monteith and determine the frequency of occurrence of the reference evapotranspiration in the city of Janaúba, MG. To assess the fit of Hargreaves Samani equation with Penman Monteith used the coefficient of determination (r²), the coefficient of correlation (r), the standard error of estimate (SEE), the index agreement (d) and the index performance (c). Kimball's method was used for determining the frequency of occurrence. The results indicate that the Hargreaves Samani method overestimates the values of Penman Monteith at 8%, but in the monthly analysis, it is observed that between the months April to August Penman values were superior to Hargreaves. All statistical criteria used showed Hargreaves Samani fitted equation with a better assessment when compared with the Penman Monteith. The higher frequency of occurrence was between 4.5 and 4.7 mm day-1 (6.62%) and the equation that indicates the probability of being equaled or exceeded evaporation showed an r² equal to 0.9676.
author	Mendes Reis,Matheus Gonçalves Oliveira,Flávio Gonçalves Lopes,Érika Manuela
author_facet	Mendes Reis,Matheus Gonçalves Oliveira,Flávio Gonçalves Lopes,Érika Manuela
author_sort	Mendes Reis,Matheus
title	Analysis of reference evapotranspiration of Janaúba, mg
title_short	Analysis of reference evapotranspiration of Janaúba, mg
title_full	Analysis of reference evapotranspiration of Janaúba, mg
title_fullStr	Analysis of reference evapotranspiration of Janaúba, mg
title_full_unstemmed	Analysis of reference evapotranspiration of Janaúba, mg
title_sort	analysis of reference evapotranspiration of janaúba, mg
publisher	Universidad de Tarapacá. Facultad de Ciencias Agronómicas
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-34292016000400009
work_keys_str_mv	AT mendesreismatheus analysisofreferenceevapotranspirationofjanaubamg AT goncalvesoliveiraflavio analysisofreferenceevapotranspirationofjanaubamg AT goncalveslopeserikamanuela analysisofreferenceevapotranspirationofjanaubamg
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Analysis of reference evapotranspiration of Janaúba, mg

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