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ESTUDO COMPARATIVO DA EVAPOTRANSPIRACAO DE REFERENCIA ENTRE LOCALIDADES NO ESTADO DE SAO PAULO E NA PROVINCIA DE HABANA FRANCISCA FRANCIANA SOUSA PEREIRA1; ENZO DAL PAI2; RANSES J. VAZQUEZ MONTENEGRO3; RODRIGO MAXIMO SANCHEZ ROMAN 4 ; ALBA MARIA GUADALUPE ORELLANA GONZALEZ 5 E JOAO FRANCISCO ESCOBEDO6 1 Professora Depto. de Engenharia Rural - UNESP/FCA, C.P. 237; CEP: 18610-307 –  Botucatu, SP – Brasil. E-mail autor principal: francanasousap@gmail.com 2 Professor Depto. de Engenharia Rural - UNESP/FCA, Botucatu, SP – Brasil. 3 Geografo, Especialista em Meteorologia agricola do Centro de Meteorologia Agricola, Instituto de Meteorologia La Habana, Cuba. 4 Professor Depto. de Engenharia Rural - UNESP/FCA, Botucatu, SP – Brasil. 5 Pos- Doutora Depto. de Engenharia Rural - UNESP/FCA, Botucatu, SP - Brasil. 6 Professor Depto. de Engenharia Rural - UNESP/FCA, Botucatu, SP – Brasil. 1 RESUMO A FAO propos a evapotranspiracao de referencia (ETo) a fim de comparar a evapotranspiracao em diferentes regioes, isso porque a maioria das equacoes empregadas na estimativa da evapotranspiracao sao empiricas e limitadas a serem usadas para locais e climas similares aqueles em que as mesmas foram determinadas. O objetivo deste estudo foi analisar a diferenca nos valores calculados de ETo para Botucatu e Piracicaba (Brasil) e Guira de Melena (Cuba), em uma base de dados de 30 anos, trabalhada na particao diaria. Avaliaram-se diferencas sazonais entre os anos e entre as localidades e posteriormente a influencia dos climas locais nestas diferencas dos valores de ETo. Os elementos climaticos temperatura maxima e minima do ar, umidade relativa do ar, velocidade do vento a 2 m de altura e insolacao foram obtidos das estacoes meteorologicas convencionais. Os valores da evapotranspiracao em Cuba foram maiores durante os meses de verao no Hemisferio Norte. Os maiores valores de evapotranspiracao em Botucatu e Piracicaba ocorreram nos meses de verao no hemisferio Sul. Existe correlacao entre as tres localidades mesmo com a distância entre as mesmas. Palavras-chave: demanda hidrica, irrigacao, recursos hidricos, Penman-Monteith SOUSA PEREIRA F. F.; DAL PAI, E.; VAZQUEZ MONTENEGRO, R. J.; SANCHEZ ROMAN, R. M.; ORELLANA GONZALEZ, A. M. G. ; ESCOBEDO, J. F. COMPARATIVE STUDY OF REFERENCE EVAPOTRANSPIRATION BETWEEN LOCALITIES IN SAO PAULO STATE AND IN THE HABANA PROVINCE 2 ABSTRACT FAO proposed the reference evapotranspiration to compare evapotranspiration in different areas, because most equations employed in estimating evapotranspiration are empirical and limited to be used for in local and climates similar to those in which they were determined. The objective of this study was to analyze the difference in the calculated values of ETo for Botucatu and Piracicaba (Brazil) and Guira Melena (Cuba), on a basis of based on 30 - year s of data. Were evaluated s S easonal differences between years and between locations were assessed and subsequently the influence of local climates on these ETo values differences in the values of ETo . The c C limatic elements maximum (Tmax) and minimum temperature (Tmax) and minimum (Tmin), relative humidity (RH), wind speed at 2 m height (U2) and solar radiation (n) were obtained from conventional meteorological stations. The values of e E vapotranspiration values in Cuba were higher during the summer months in the Northern Hemisphere. The highest values of evapotranspiration values in Botucatu and Piracicaba occurred in the summer months in the Southern Hemisphere. Correlation exists between the three locations with the same distance between them. It was concluded from the methodology used that the three localities have different values of evapotranspiration values and despite being in different hemispheres the evapotranspiration among Piracicaba and Guira Melena are closer than the one verified between Botucatu and Piracicaba. Keywords: water requirement, evapotranspiration, irrigation, water resources, Penman Monteith

ESTUDO COMPARATIVO DA EVAPOTRANSPIRAÇÃO DE REFERÊNCIA ENTRE LOCALIDADES NO ESTADO DE SÃO PAULO E NA PROVÍNCIA DE HABANA