{"id":{"repo_id":"brazil-ufpb","oai_identifier":"oai:repositorio.ufpb.br:123456789/579"},"canonical_url":"https://search.dev.ndltd.org/etd/brazil-ufpb/oai:repositorio.ufpb.br:123456789/579","repository":{"repo_id":"brazil-ufpb","name":"Brazil UFPB","base_url":"https://repositorio.ufpb.br/oai/request"},"display":{"title":"Comparação de equações que estimam a evapotranspiração de referência (ETo) com o modelo de Penman-Monteith padrão FAO nas condições do município de Areia-PB","abstract":"The main objective of this study was to compare the reference evapotranspiration (ETo), estimated by the Blaney & Criddle, Priestley-Taylor, Hargreaves & Samani and the class \"A\" Tank equations, with those estimated by the Standard FAO Penman-Monteith model in Areia-PB conditions. To achieve this goal, average monthly weather data of the maximum, average and minimum air temperatures, relative humidity, wind, precipitation and sunshine, series 1998-2007, obtained from the meteorological station of the CCA / UFPB were processed and analyzed for the calculation of ETo and other variables. It used to estimate reference evapotranspiration the program Reference Evapotranspiration Calculator (Ref-ET). The ETo estimated by all methods studied, except for the model Blaney & Criddle, overestimated ETo determined by the standard model of Penman-Monteith-FAO, recommended for calibration of the other methods. The coefficient of determination (R2) of all models analyzed was higher than 0.90, with emphasis on the method of Priestley & Taylor. This model had a coefficient of determination of 0.9806. Comparing the equations studied by calculating the index \"c\" of Willmott, mean absolute error (MPE) and maximum error (ME), it was observed that the methodology of Blaney & Criddle showed the best performance with the index c = 0.89, which is considered very good, followed by Class \"A\" Tank with c = 0.62, Hargreaves & Samani with c = 0.60 and Priestley-Taylor with c = 0.55, ranked with average performance.","abstract_html":"The main objective of this study was to compare the reference evapotranspiration (ETo), estimated by the Blaney & Criddle, Priestley-Taylor, Hargreaves & Samani and the class "A" Tank equations, with those estimated by the Standard FAO Penman-Monteith model in Areia-PB conditions. To achieve this goal, average monthly weather data of the maximum, average and minimum air temperatures, relative humidity, wind, precipitation and sunshine, series 1998-2007, obtained from the meteorological station of the CCA / UFPB were processed and analyzed for the calculation of ETo and other variables. It used to estimate reference evapotranspiration the program Reference Evapotranspiration Calculator (Ref-ET). The ETo estimated by all methods studied, except for the model Blaney & Criddle, overestimated ETo determined by the standard model of Penman-Monteith-FAO, recommended for calibration of the other methods. The coefficient of determination (R2) of all models analyzed was higher than 0.90, with emphasis on the method of Priestley & Taylor. This model had a coefficient of determination of 0.9806. Comparing the equations studied by calculating the index "c" of Willmott, mean absolute error (MPE) and maximum error (ME), it was observed that the methodology of Blaney & Criddle showed the best performance with the index c = 0.89, which is considered very good, followed by Class "A" Tank with c = 0.62, Hargreaves & Samani with c = 0.60 and Priestley-Taylor with c = 0.55, ranked with average performance.","abstract_has_math":false,"creators":["MARINHO, Éden César Silva"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-07-16","date_published":"2014-07-16","updated_at":"2026-07-24T01:17:57Z","subjects":["EVAPOTRANSPIRAÇÃO","TEMPERATURA ATMOSFERICA","METEOROLOGIA","AREIA, PB"],"languages":["pt"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://repositorio.ufpb.br/123456789/579","outbound_label":"Repository record","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["MARINHO, Éden César Silva"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2014-07-16T14:05:12Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2014-07-16T14:05:12Z"]},{"key":"dc:date.issued","label":"Date","values":["2014-07-16"]},{"key":"dc:type","label":"Dc Type","values":["TCC"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["EVAPOTRANSPIRAÇÃO","TEMPERATURA ATMOSFERICA","METEOROLOGIA","AREIA, PB"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["pt"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://repositorio.ufpb.br/123456789/579"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["O objetivo principal desse trabalho foi comparar a evapotranspiração de referência (ETo), estimada pelos métodos de Blaney & Criddle, Priestley-Taylor, Hargreaves & Samani e pelo Tanque Classe “A”, com a ETo estimada pelo modelo Penman-Monteith Padrão FAO, nas condições de Areia-PB. Para se alcançar esse objetivo, dados meteorológicos diários médios mensais da temperatura máxima, média e mínima do ar, umidade relativa, vento, precipitação pluviométrica e insolação, da série 1998-2007, obtidos na Estação Meteorológica do CCA/UFPB, foram processados e analisados para o cálculo da ETo e demais variáveis. Usou-se para a estimativa da evapotranspiração de referência o programa Reference Evapotranspiration Calculator (Ref-ET). A ETo estimada por todos os métodos estudados, com exceção do modelo de Blaney & Criddle, superestimaram a ETo determinada pelo modelo padrão de Penman-Monteith, recomendado pela FAO para calibração de outros métodos. O coeficiente de determinação (R2) de todos os modelos analisados foi superior a 0,90, com destaque para o método de Priestley & Taylor cujo coeficiente de determinação foi 0.9806. Ao se comparar as equações estudadas calculando-se o índice “c” de Willmott, o erro médio absoluto (EMA) e o erro máximo (EM), observou-se que a metodologia de Blaney & Criddle foi a que apresentou o melhor desempenho com o índice c = 0,89, considerado muito bom, seguido pelo Tanque Classe “A” com c = 0,62, Hargreaves & Samani com c = 0,60 e Priestley-Taylor com c = 0,55, classificados com desempenho mediano."]},{"key":"dc:description.abstract","label":"Abstract","values":["The main objective of this study was to compare the reference evapotranspiration (ETo), estimated by the Blaney & Criddle, Priestley-Taylor, Hargreaves & Samani and the class \"A\" Tank equations, with those estimated by the Standard FAO Penman-Monteith model in Areia-PB conditions. To achieve this goal, average monthly weather data of the maximum, average and minimum air temperatures, relative humidity, wind, precipitation and sunshine, series 1998-2007, obtained from the meteorological station of the CCA / UFPB were processed and analyzed for the calculation of ETo and other variables. It used to estimate reference evapotranspiration the program Reference Evapotranspiration Calculator (Ref-ET). The ETo estimated by all methods studied, except for the model Blaney & Criddle, overestimated ETo determined by the standard model of Penman-Monteith-FAO, recommended for calibration of the other methods. The coefficient of determination (R2) of all models analyzed was higher than 0.90, with emphasis on the method of Priestley & Taylor. This model had a coefficient of determination of 0.9806. Comparing the equations studied by calculating the index \"c\" of Willmott, mean absolute error (MPE) and maximum error (ME), it was observed that the methodology of Blaney & Criddle showed the best performance with the index c = 0.89, which is considered very good, followed by Class \"A\" Tank with c = 0.62, Hargreaves & Samani with c = 0.60 and Priestley-Taylor with c = 0.55, ranked with average performance."]},{"key":"dc:title","label":"Title","values":["Comparação de equações que estimam a evapotranspiração de referência (ETo) com o modelo de Penman-Monteith padrão FAO nas condições do município de Areia-PB"]}]}],"canonical_facts":{"dc:creator":["MARINHO, Éden César Silva"],"dc:date.accessioned":["2014-07-16T14:05:12Z"],"dc:date.available":["2014-07-16T14:05:12Z"],"dc:date.issued":["2014-07-16"],"dc:description":["O objetivo principal desse trabalho foi comparar a evapotranspiração de referência (ETo), estimada pelos métodos de Blaney & Criddle, Priestley-Taylor, Hargreaves & Samani e pelo Tanque Classe “A”, com a ETo estimada pelo modelo Penman-Monteith Padrão FAO, nas condições de Areia-PB. Para se alcançar esse objetivo, dados meteorológicos diários médios mensais da temperatura máxima, média e mínima do ar, umidade relativa, vento, precipitação pluviométrica e insolação, da série 1998-2007, obtidos na Estação Meteorológica do CCA/UFPB, foram processados e analisados para o cálculo da ETo e demais variáveis. Usou-se para a estimativa da evapotranspiração de referência o programa Reference Evapotranspiration Calculator (Ref-ET). A ETo estimada por todos os métodos estudados, com exceção do modelo de Blaney & Criddle, superestimaram a ETo determinada pelo modelo padrão de Penman-Monteith, recomendado pela FAO para calibração de outros métodos. O coeficiente de determinação (R2) de todos os modelos analisados foi superior a 0,90, com destaque para o método de Priestley & Taylor cujo coeficiente de determinação foi 0.9806. Ao se comparar as equações estudadas calculando-se o índice “c” de Willmott, o erro médio absoluto (EMA) e o erro máximo (EM), observou-se que a metodologia de Blaney & Criddle foi a que apresentou o melhor desempenho com o índice c = 0,89, considerado muito bom, seguido pelo Tanque Classe “A” com c = 0,62, Hargreaves & Samani com c = 0,60 e Priestley-Taylor com c = 0,55, classificados com desempenho mediano."],"dc:description.abstract":["The main objective of this study was to compare the reference evapotranspiration (ETo), estimated by the Blaney & Criddle, Priestley-Taylor, Hargreaves & Samani and the class \"A\" Tank equations, with those estimated by the Standard FAO Penman-Monteith model in Areia-PB conditions. To achieve this goal, average monthly weather data of the maximum, average and minimum air temperatures, relative humidity, wind, precipitation and sunshine, series 1998-2007, obtained from the meteorological station of the CCA / UFPB were processed and analyzed for the calculation of ETo and other variables. It used to estimate reference evapotranspiration the program Reference Evapotranspiration Calculator (Ref-ET). The ETo estimated by all methods studied, except for the model Blaney & Criddle, overestimated ETo determined by the standard model of Penman-Monteith-FAO, recommended for calibration of the other methods. The coefficient of determination (R2) of all models analyzed was higher than 0.90, with emphasis on the method of Priestley & Taylor. This model had a coefficient of determination of 0.9806. Comparing the equations studied by calculating the index \"c\" of Willmott, mean absolute error (MPE) and maximum error (ME), it was observed that the methodology of Blaney & Criddle showed the best performance with the index c = 0.89, which is considered very good, followed by Class \"A\" Tank with c = 0.62, Hargreaves & Samani with c = 0.60 and Priestley-Taylor with c = 0.55, ranked with average performance."],"dc:identifier.uri":["https://repositorio.ufpb.br/123456789/579"],"dc:language.iso":["pt"],"dc:subject":["EVAPOTRANSPIRAÇÃO","TEMPERATURA ATMOSFERICA","METEOROLOGIA","AREIA, PB"],"dc:title":["Comparação de equações que estimam a evapotranspiração de referência (ETo) com o modelo de Penman-Monteith padrão FAO nas condições do município de Areia-PB"],"dc:type":["TCC"]},"updated_at":"2026-07-24T01:17:57Z"}