Methods of estimation of reference crop evapotranspiration for the conditions of northeastern semi-arid, Brazil

Detalhes bibliográficos
Autor(a) principal: Cavalcante Junior, Edmilson Gomes
Data de Publicação: 2011
Outros Autores: Oliveira, Alexsandra Duarte, Almeida, Bruno Marçal de, Espínola Sobrinho, José
Tipo de documento: Artigo
Idioma: por
Título da fonte: Semina. Ciências Agrárias (Online)
DOI: 10.5433/1679-0359.2011v32n4Sup1p1699
Texto Completo: https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/4801
Resumo: The objective of this work was to evaluate methods of estimation of reference crop evapotranspiration (ETo) in conditions of low and high air relative humidity, using the Penman Monteith-FAO 56 method as reference. Data from the period between January 2002 and June 2008 were obtained from a conventional meteorological station at Semiarid Federal Rural University, in Mossoró, RN, Brazil. Evaluation of methods was made by means of the precision index “r”, accuracy “d”, and of confidence or performance “c”. Methods Kimberly-Penman 1982, Kimberly-Penman 1972, Benevides-Lopez 1970 and Hargreaves-Samani 1985 obtained an important improvement in their performance when high air relative humidity conditions were considered (UR > 70%), compared to low air relative humidity conditions (UR < 70%). Equations of Makkink 1957 and Hamon 1961 underestimated ETo in both periods, and the method Penman modified-FAO24 showed tendency to overestimate the reference method. Methods Penman 1948, FAO24-Radiation, FAO24-Blaney-Criddle and Frere-Popov presented the higher performance among the evaluated methods.
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spelling Methods of estimation of reference crop evapotranspiration for the conditions of northeastern semi-arid, BrazilMétodos de estimativa da evapotranspiração de referência para as condições do semi árido NordestinoPenman Monteith-FAO 56HumidityEto.Penman Monteith-FAO 56UmidadeEto.The objective of this work was to evaluate methods of estimation of reference crop evapotranspiration (ETo) in conditions of low and high air relative humidity, using the Penman Monteith-FAO 56 method as reference. Data from the period between January 2002 and June 2008 were obtained from a conventional meteorological station at Semiarid Federal Rural University, in Mossoró, RN, Brazil. Evaluation of methods was made by means of the precision index “r”, accuracy “d”, and of confidence or performance “c”. Methods Kimberly-Penman 1982, Kimberly-Penman 1972, Benevides-Lopez 1970 and Hargreaves-Samani 1985 obtained an important improvement in their performance when high air relative humidity conditions were considered (UR > 70%), compared to low air relative humidity conditions (UR < 70%). Equations of Makkink 1957 and Hamon 1961 underestimated ETo in both periods, and the method Penman modified-FAO24 showed tendency to overestimate the reference method. Methods Penman 1948, FAO24-Radiation, FAO24-Blaney-Criddle and Frere-Popov presented the higher performance among the evaluated methods. O objetivo deste trabalho foi avaliar métodos de estimativa da evapotranspiração de referência (ETo) em condições de baixa e elevada umidade relativa usando o método de Penman Monteith-FAO 56 como referência. Foram utilizados dados de uma estação meteorológica convencional pertencente à Universidade Federal Rural do Semiárido, em Mossoró-RN referentes ao período de janeiro de 2002 a junho de 2008. A avaliação do desempenho foi realizada por meio do índice de precisão “r”, um índice de exatidão “d”, e de confiança ou desempenho “c”. Os métodos Kimberly-Penman 1982, Kimberly-Penman 1972, Benevides-Lopez 1970 e Hargreaves-Samani 1985 tiveram um aumento substancial nos seus desempenhos quando utilizados em condições de elevada umidade (UR > 70%), em comparação com as condições de baixa umidade (UR < 70%). As equações de Makkink 1957 e Hamon 1961 subestimaram a ETo em ambos os períodos e o método Penman modificado-FAO24 tendeu a superestimar o método padrão. Os métodos Penman 1948, FAO24-Radiação, FAO24-Blaney-Criddle e Frere-Popov apresentaram melhor desempenho entre os avaliados.UEL2011-12-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPesquisa Empírica de Campoapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/480110.5433/1679-0359.2011v32n4Sup1p1699Semina: Ciências Agrárias; Vol. 32 No. 4Sup1 (2011); 1699-1708Semina: Ciências Agrárias; v. 32 n. 4Sup1 (2011); 1699-17081679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELporhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/4801/9129Cavalcante Junior, Edmilson GomesOliveira, Alexsandra DuarteAlmeida, Bruno Marçal deEspínola Sobrinho, Joséinfo:eu-repo/semantics/openAccess2015-11-19T18:38:10Zoai:ojs.pkp.sfu.ca:article/4801Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2015-11-19T18:38:10Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false
dc.title.none.fl_str_mv Methods of estimation of reference crop evapotranspiration for the conditions of northeastern semi-arid, Brazil
Métodos de estimativa da evapotranspiração de referência para as condições do semi árido Nordestino
title Methods of estimation of reference crop evapotranspiration for the conditions of northeastern semi-arid, Brazil
spellingShingle Methods of estimation of reference crop evapotranspiration for the conditions of northeastern semi-arid, Brazil
Methods of estimation of reference crop evapotranspiration for the conditions of northeastern semi-arid, Brazil
Cavalcante Junior, Edmilson Gomes
Penman Monteith-FAO 56
Humidity
Eto.
Penman Monteith-FAO 56
Umidade
Eto.
Cavalcante Junior, Edmilson Gomes
Penman Monteith-FAO 56
Humidity
Eto.
Penman Monteith-FAO 56
Umidade
Eto.
title_short Methods of estimation of reference crop evapotranspiration for the conditions of northeastern semi-arid, Brazil
title_full Methods of estimation of reference crop evapotranspiration for the conditions of northeastern semi-arid, Brazil
title_fullStr Methods of estimation of reference crop evapotranspiration for the conditions of northeastern semi-arid, Brazil
Methods of estimation of reference crop evapotranspiration for the conditions of northeastern semi-arid, Brazil
title_full_unstemmed Methods of estimation of reference crop evapotranspiration for the conditions of northeastern semi-arid, Brazil
Methods of estimation of reference crop evapotranspiration for the conditions of northeastern semi-arid, Brazil
title_sort Methods of estimation of reference crop evapotranspiration for the conditions of northeastern semi-arid, Brazil
author Cavalcante Junior, Edmilson Gomes
author_facet Cavalcante Junior, Edmilson Gomes
Cavalcante Junior, Edmilson Gomes
Oliveira, Alexsandra Duarte
Almeida, Bruno Marçal de
Espínola Sobrinho, José
Oliveira, Alexsandra Duarte
Almeida, Bruno Marçal de
Espínola Sobrinho, José
author_role author
author2 Oliveira, Alexsandra Duarte
Almeida, Bruno Marçal de
Espínola Sobrinho, José
author2_role author
author
author
dc.contributor.author.fl_str_mv Cavalcante Junior, Edmilson Gomes
Oliveira, Alexsandra Duarte
Almeida, Bruno Marçal de
Espínola Sobrinho, José
dc.subject.por.fl_str_mv Penman Monteith-FAO 56
Humidity
Eto.
Penman Monteith-FAO 56
Umidade
Eto.
topic Penman Monteith-FAO 56
Humidity
Eto.
Penman Monteith-FAO 56
Umidade
Eto.
description The objective of this work was to evaluate methods of estimation of reference crop evapotranspiration (ETo) in conditions of low and high air relative humidity, using the Penman Monteith-FAO 56 method as reference. Data from the period between January 2002 and June 2008 were obtained from a conventional meteorological station at Semiarid Federal Rural University, in Mossoró, RN, Brazil. Evaluation of methods was made by means of the precision index “r”, accuracy “d”, and of confidence or performance “c”. Methods Kimberly-Penman 1982, Kimberly-Penman 1972, Benevides-Lopez 1970 and Hargreaves-Samani 1985 obtained an important improvement in their performance when high air relative humidity conditions were considered (UR > 70%), compared to low air relative humidity conditions (UR < 70%). Equations of Makkink 1957 and Hamon 1961 underestimated ETo in both periods, and the method Penman modified-FAO24 showed tendency to overestimate the reference method. Methods Penman 1948, FAO24-Radiation, FAO24-Blaney-Criddle and Frere-Popov presented the higher performance among the evaluated methods.
publishDate 2011
dc.date.none.fl_str_mv 2011-12-06
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Pesquisa Empírica de Campo
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/4801
10.5433/1679-0359.2011v32n4Sup1p1699
url https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/4801
identifier_str_mv 10.5433/1679-0359.2011v32n4Sup1p1699
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/4801/9129
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv UEL
publisher.none.fl_str_mv UEL
dc.source.none.fl_str_mv Semina: Ciências Agrárias; Vol. 32 No. 4Sup1 (2011); 1699-1708
Semina: Ciências Agrárias; v. 32 n. 4Sup1 (2011); 1699-1708
1679-0359
1676-546X
reponame:Semina. Ciências Agrárias (Online)
instname:Universidade Estadual de Londrina (UEL)
instacron:UEL
instname_str Universidade Estadual de Londrina (UEL)
instacron_str UEL
institution UEL
reponame_str Semina. Ciências Agrárias (Online)
collection Semina. Ciências Agrárias (Online)
repository.name.fl_str_mv Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)
repository.mail.fl_str_mv semina.agrarias@uel.br
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dc.identifier.doi.none.fl_str_mv 10.5433/1679-0359.2011v32n4Sup1p1699

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