HARGREAVES-SAMANI EQUATION CALIBRATED IN DIFFERENT TIME BASES FOR SETE LAGOAS, MG, BRAZIL
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Engenharia na Agricultura |
Texto Completo: | https://periodicos.ufv.br/reveng/article/view/667 |
Resumo: | The FAO Penman-Monteith method (FAO-PM) for determination of the reference evapotranspiration (ETo) may have its application restricted by lack of one or more wheather data. One of the alternative methods with lowest data requirement is the Hargreaves-Samani (HS). This study aimed to evaluate the performance of the HS method on its original form and after calibration on annual, semiannual, quarterly and monthly basis, compared to the FAO-PM method. For this, it was used a time series of 86 years of daily weather data obtained from a conventional meteorological station of INMET in Sete Lagoas, MG, Brazil. It was calibrated the coefficients and exponent of the HS equation by minimizing the mean absolute error. Afterwards the analysis of descriptive statistics was performed. To test the feasibility of comparative tests and to evaluate the fit of the probability distributions of the daily values of ETo, it was applied the Kolmogorov-Smirnov and Mann-Whitney test, respectively, at 5% significance level. Calibration of HS method removed the trend of systematic overestimation of daily ETo values as compared to FAO-PM. There was no significant difference between the probability distributions of daily ETo values calculated by the HS method calibrated at different time basis. |
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Engenharia na Agricultura |
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HARGREAVES-SAMANI EQUATION CALIBRATED IN DIFFERENT TIME BASES FOR SETE LAGOAS, MG, BRAZILEQUAÇÃO DE HARGREAVES-SAMANI CALIBRADA EM DIFERENTES BASES TEMPORAIS PARA SETE LAGOAS, MGdistribuição de probabilidadeevapotranspiração de referênciaFAO Penman-MonteithThe FAO Penman-Monteith method (FAO-PM) for determination of the reference evapotranspiration (ETo) may have its application restricted by lack of one or more wheather data. One of the alternative methods with lowest data requirement is the Hargreaves-Samani (HS). This study aimed to evaluate the performance of the HS method on its original form and after calibration on annual, semiannual, quarterly and monthly basis, compared to the FAO-PM method. For this, it was used a time series of 86 years of daily weather data obtained from a conventional meteorological station of INMET in Sete Lagoas, MG, Brazil. It was calibrated the coefficients and exponent of the HS equation by minimizing the mean absolute error. Afterwards the analysis of descriptive statistics was performed. To test the feasibility of comparative tests and to evaluate the fit of the probability distributions of the daily values of ETo, it was applied the Kolmogorov-Smirnov and Mann-Whitney test, respectively, at 5% significance level. Calibration of HS method removed the trend of systematic overestimation of daily ETo values as compared to FAO-PM. There was no significant difference between the probability distributions of daily ETo values calculated by the HS method calibrated at different time basis.Dados de evapotranspiração de referência (ETo) são requeridos em diversas análises relacionadas ao uso de recursos hídricos, como no manejo de irrigação, balanço hídrico de sequeiro, manejo de bacias hidrográficas, etc. O método FAO Penman-Monteith (FAO-PM) é considerado padrão para cálculo da ETo. Contudo, a aplicação deste método pode ser restringida pela falta de dados meteorológicos. Um dos métodos alternativos com menor requisição de dados é o Hargreaves-Samani (HS), o qual comumente necessita calibração local para obtenção de maior exatidão na aplicação. O objetivo deste trabalho foi avaliar o desempenho do método Hargreaves-Samani, na sua forma original e calibrado em base anual, semestral, trimestral e mensal, frente ao método padrão FAO-PM, com base em extensa série histórica de dados meteorológicos diários (86 anos), para a localidade de Sete Lagoas, MG. Calibraram-se os coeficientes e o expoente da equação de HS pela minimização do erro absoluto médio (EAM). Para avaliar a adequabilidade de aplicação de testes comparativos e para determinar o ajuste das distribuições de probabilidade de ETo, foram aplicados os testes de Kolmogorov-Smirnov e Mann-Whitney, respectivamente. A calibração do método HS anulou a tendência de superestimativa sistemática dos valores de ETo diária, comparativamente ao FAO-PM, reduzindo-se o EAM. A calibração em diferentes bases temporais acarretou a aproximação das distribuições de probabilidade de ETo calculada por meio do método HS, que não diferiram significativamente entre si, à obtida com o método FAO-PM.Universidade Federal de Viçosa - UFV2017-03-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufv.br/reveng/article/view/66710.13083/reveng.v25i1.742Engineering in Agriculture; Vol. 25 No. 1 (2017); 38-49Revista Engenharia na Agricultura - REVENG; v. 25 n. 1 (2017); 38-492175-68131414-398410.13083/reveng.v25i1reponame:Engenharia na Agriculturainstname:Universidade Federal de Viçosa (UFV)instacron:UFVporhttps://periodicos.ufv.br/reveng/article/view/667/444Borges Júnior, João Carlos FerreiraOliveira, Aline Lilian MarquesAndrade, Camilo de Lelis Teixeira dePinheiro, Marcus André Braidoinfo:eu-repo/semantics/openAccess2023-01-19T13:32:22Zoai:ojs.periodicos.ufv.br:article/667Revistahttps://periodicos.ufv.br/revengPUBhttps://periodicos.ufv.br/reveng/oairevistaengenharianagricultura@gmail.com||andrerosa@ufv.br||tramitacao.reveng@gmail.com|| reveng@ufv.br2175-68131414-3984opendoar:2023-01-19T13:32:22Engenharia na Agricultura - Universidade Federal de Viçosa (UFV)false |
dc.title.none.fl_str_mv |
HARGREAVES-SAMANI EQUATION CALIBRATED IN DIFFERENT TIME BASES FOR SETE LAGOAS, MG, BRAZIL EQUAÇÃO DE HARGREAVES-SAMANI CALIBRADA EM DIFERENTES BASES TEMPORAIS PARA SETE LAGOAS, MG |
title |
HARGREAVES-SAMANI EQUATION CALIBRATED IN DIFFERENT TIME BASES FOR SETE LAGOAS, MG, BRAZIL |
spellingShingle |
HARGREAVES-SAMANI EQUATION CALIBRATED IN DIFFERENT TIME BASES FOR SETE LAGOAS, MG, BRAZIL Borges Júnior, João Carlos Ferreira distribuição de probabilidade evapotranspiração de referência FAO Penman-Monteith |
title_short |
HARGREAVES-SAMANI EQUATION CALIBRATED IN DIFFERENT TIME BASES FOR SETE LAGOAS, MG, BRAZIL |
title_full |
HARGREAVES-SAMANI EQUATION CALIBRATED IN DIFFERENT TIME BASES FOR SETE LAGOAS, MG, BRAZIL |
title_fullStr |
HARGREAVES-SAMANI EQUATION CALIBRATED IN DIFFERENT TIME BASES FOR SETE LAGOAS, MG, BRAZIL |
title_full_unstemmed |
HARGREAVES-SAMANI EQUATION CALIBRATED IN DIFFERENT TIME BASES FOR SETE LAGOAS, MG, BRAZIL |
title_sort |
HARGREAVES-SAMANI EQUATION CALIBRATED IN DIFFERENT TIME BASES FOR SETE LAGOAS, MG, BRAZIL |
author |
Borges Júnior, João Carlos Ferreira |
author_facet |
Borges Júnior, João Carlos Ferreira Oliveira, Aline Lilian Marques Andrade, Camilo de Lelis Teixeira de Pinheiro, Marcus André Braido |
author_role |
author |
author2 |
Oliveira, Aline Lilian Marques Andrade, Camilo de Lelis Teixeira de Pinheiro, Marcus André Braido |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Borges Júnior, João Carlos Ferreira Oliveira, Aline Lilian Marques Andrade, Camilo de Lelis Teixeira de Pinheiro, Marcus André Braido |
dc.subject.por.fl_str_mv |
distribuição de probabilidade evapotranspiração de referência FAO Penman-Monteith |
topic |
distribuição de probabilidade evapotranspiração de referência FAO Penman-Monteith |
description |
The FAO Penman-Monteith method (FAO-PM) for determination of the reference evapotranspiration (ETo) may have its application restricted by lack of one or more wheather data. One of the alternative methods with lowest data requirement is the Hargreaves-Samani (HS). This study aimed to evaluate the performance of the HS method on its original form and after calibration on annual, semiannual, quarterly and monthly basis, compared to the FAO-PM method. For this, it was used a time series of 86 years of daily weather data obtained from a conventional meteorological station of INMET in Sete Lagoas, MG, Brazil. It was calibrated the coefficients and exponent of the HS equation by minimizing the mean absolute error. Afterwards the analysis of descriptive statistics was performed. To test the feasibility of comparative tests and to evaluate the fit of the probability distributions of the daily values of ETo, it was applied the Kolmogorov-Smirnov and Mann-Whitney test, respectively, at 5% significance level. Calibration of HS method removed the trend of systematic overestimation of daily ETo values as compared to FAO-PM. There was no significant difference between the probability distributions of daily ETo values calculated by the HS method calibrated at different time basis. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-03-31 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.ufv.br/reveng/article/view/667 10.13083/reveng.v25i1.742 |
url |
https://periodicos.ufv.br/reveng/article/view/667 |
identifier_str_mv |
10.13083/reveng.v25i1.742 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.ufv.br/reveng/article/view/667/444 |
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 |
Universidade Federal de Viçosa - UFV |
publisher.none.fl_str_mv |
Universidade Federal de Viçosa - UFV |
dc.source.none.fl_str_mv |
Engineering in Agriculture; Vol. 25 No. 1 (2017); 38-49 Revista Engenharia na Agricultura - REVENG; v. 25 n. 1 (2017); 38-49 2175-6813 1414-3984 10.13083/reveng.v25i1 reponame:Engenharia na Agricultura instname:Universidade Federal de Viçosa (UFV) instacron:UFV |
instname_str |
Universidade Federal de Viçosa (UFV) |
instacron_str |
UFV |
institution |
UFV |
reponame_str |
Engenharia na Agricultura |
collection |
Engenharia na Agricultura |
repository.name.fl_str_mv |
Engenharia na Agricultura - Universidade Federal de Viçosa (UFV) |
repository.mail.fl_str_mv |
revistaengenharianagricultura@gmail.com||andrerosa@ufv.br||tramitacao.reveng@gmail.com|| reveng@ufv.br |
_version_ |
1788355358868111360 |