Data/hora: 03/06/2024 09:50:53

Provedor de dados: 	Scientia Agricola	
País: 	Brazil	
Título: 	Reference evapotranspiration based on class A pan evaporation	
Autores: 	Conceição,Marco Antônio Fonseca.	
Data: 	2002-09-01	
Ano: 	2002	
Palavras-chave: 	Penman-Monteith; Pan coefficient; Irrigation.	
Resumo: 	Estimating reference evapotranspiration (ETo) based on Class A pan evaporation (ECA) is very usual in irrigated areas. For this purpose the ECA values are multiplied by a pan coefficient (Kp) to obtain ETo. Kp values can be estimated in different ways being, however, important to know which method would estimate the best value for a given locality. In the present work estimated values of ETo based on Class A pan evaporation, using Kp values determined by different methods, were compared to Penman-Monteith-FAO (EToPM) values for the northwest region of the São Paulo State, Brazil. The annual average Kp, determined dividing EToPM by ECA, was 0.74. For the rainy months (December to March) the average Kp value was 0.80 and for the dry months (April to November) 0.70. The reference evapotranspiration estimated using Kp determined by the Snyder equation presented the best regression coefficients when compared to EToPM.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000300001	
Editor: 	São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"	
Relação: 	10.1590/S0103-90162002000300001	
Formato: 	text/html	
Fonte: 	Scientia Agricola  v.59 n.3 2002	
Fonte: 	info:eu-repo/semantics/openAccess