NDLI: Comparação Entre Métodos De Estimativa Da Evapotranspiração De Referência Para O Município De Petrolina, Pe

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Comparação Entre Métodos De Estimativa Da Evapotranspiração De Referência Para O Município De Petrolina, Pe

Content Provider	Semantic Scholar
Author	Santos, R. D. S. Souza, M. H. C. Bispo, Regiane De Carvalho Ventura, K. M. Bassoi, Luís Henrique
Copyright Year	2017
Abstract	COMPARACAO ENTRE METODOS DE ESTIMATIVA DA EVAPOTRANSPIRACAO DE REFERENCIA PARA O MUNICIPIO DE PETROLINA, PE ROBERTA DANIELA DA SILVA SANTOS 1 ; MARCELLO HENRYQUE COSTA DE SOUZA 1 ; REGIANE DE CARVALHO BISPO 1 ; KEVIM MUNIZ VENTURA 1 E LUIS HENRIQUE BASSOI 2 1 Programa de Pos-Graduacao em Irrigacao e Drenagem, Universidade Estadual Paulista “Julio de Mesquita Filho”- UNESP/FCA, Rua Dr. Jose Barbosa de Barros, 1780, Botucatu, SP, roberta_dani30@hotmail.com, marcello_henry@hotmail.com, regianecarvalhoks@gmail.com, kkkevim@hotmail.com 2 Pesquisador Embrapa Instrumentacao, Sao Carlos, SP, luis.bassoi@embrapa.br 1 RESUMO O conhecimento da evapotranspiracao e vital na determinacao das necessidades hidricas de uma cultura. Diante disso, o objetivo deste trabalho foi comparar o desempenho de sete metodos de estimativa da evapotranspiracao de referencia em relacao ao metodo de Penman-Monteith, adotado como padrao, para o municipio de Petrolina, PE. Foram utilizados dados climaticos diarios de 2004 a 2015, para estimar da ET 0 , obtidos na estacao meteorologica automatica do Campo Experimental de Bebedouro da Embrapa Semiarido, Petrolina, PE. Os indicadores estatisticos utilizados na avaliacao foram: coeficiente de determinacao (r²); coeficiente de correlacao (r); indice de concordância (d) e indice de desempenho (c). Os valores do r² mostraram que o metodo de estimativa que melhor se ajustou ao metodo de Penman-Monteith foi o de Ivanov (0,73); seguido pelos metodos de Jensen-Haise (0,64); Makkink e Priestley-Taylor (0,63); Villa Nova (0,62); Hargreaves e Samani (0,53) e Hamon (0,45). No entanto, com relacao ao do indice “c”, Hamon foi classificado com “pessimo”; Makkink como “mau”; Hargreaves e Samani e Villa Nova como “sofrivel”; Ivanov e Priestley-Taylor como “mediano”; e Jensen-Haise como “bom”. Esse ultimo metodo foi considerado como o de melhor classificacao de desempenho. Palavras-chave : Penman-Monteith, correlacao, semiarido. SANTOS, R. D. S.; SOUZA, M. H. C.; BISPO, R. de C.; VENTURA, K. M.; BASSOI, L. H. METHOD-COMPARISON STUDY TO ESTIMATE THE REFERENCE EVAPOTRANSPIRATION IN PETROLINA, PE 2 ABSTRACT The knowledge on evapotranspiration is vital in determining the water requirements of a crop. Therefore, this paper aims to compare the performance of seven of estimation methods for the reference evapotranspiration in relation to the Penman-Monteith method, adopted as standard, for the municipality of Petrolina, state of Pernambuco, Brazil. We used daily climatic data from 2004 to 2015 to estimate the ET 0 coefficient, obtained in the automatic weather station of the Test Field in Bebedouro, Embrapa in the Semi-arid climate. The statistical indicators used in the evaluation were: coefficient of determination (r²), correlation coefficient (r), agreement index (d) and performance index (c). The r 2 values showed that the estimation method that best fitted to the Penman-Monteith method was Ivanov's (0.73), followed by Jensen-Haise (0.64), Makkink and Priestley-Taylor (0.63), Villa Nova (0.62), Hargreaves and Samani (0.53) and Hamon (0.45) methods. However, in relation to the index "c", Hamon was classified as "very poor"; Makkink as "poor"; Hargreaves and Samani and Villa Nova as "tolerable"; Ivanov and Priestley-Taylor as "medium"; and Jensen-Haise as "good". The last one was considered as the best performance rating method. Keywords : Penman-Monteith, correlation, semi-arid climate.
Starting Page	31
Ending Page	39
Page Count	9
File Format	PDF HTM / HTML
DOI	10.15809/irriga.2017v1n1p31-39
Volume Number	1
Alternate Webpage(s)	http://irriga.fca.unesp.br/index.php/irriga/article/download/2795/1695
Alternate Webpage(s)	https://doi.org/10.15809/irriga.2017v1n1p31-39
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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