Evaluation of Methods of Estimation of Evapotranspiration of Reference (<i>ETo</i>) Daily for Regions of the States of Rio De Janeiro and Espírito Santo

Coutinho, Eluã Ramos; Madeira, Jonni Guiller Ferreira; Silva, Robson Mariano da; Oliveira, Elizabeth Mendes de; Delgado, Angel Ramon Sanchez

doi:10.1590/0102-77863540069

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Article • Rev. bras. meteorol. 35 (4) • Oct-Dec 2020 • https://doi.org/10.1590/0102-77863540069 copy

Evaluation of Methods of Estimation of Evapotranspiration of Reference (ETo) Daily for Regions of the States of Rio De Janeiro and Espírito Santo

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

The high consumption of water by agriculture makes knowledge about reference evapotranspiration (ETo) for irrigation management more and more essential. However, define an appropriate method to the different locations is associated with the availability of meteorological data and the adaptation of the methods to the application sites. Thus, the objective of this study is to compare and evaluate the performance of the ETo methods: Hargreaves-Samani, Jensen-Haise, Benavides & Lopez and Hamon using the standard method Penman Monteith FAO-56, to estimate the daily ETo of six regions, three of the state of Rio de Janeiro and three of the state of Espírito Santo. The meteorological variables employed were provided by the Center for Weather Forecasting and Climate Studies and the National Institute of Space Research - (CPTEC - INPE). The performance of the models was evaluated by different statistical techniques where the model that best suited the studied locations in the two states was the Jensen Haise, obtaining correlation indexes (r) between 0.73 and 0.94 and reliability (C) between 0.60 and 0.90 with the Penman Monteith model.

Keywords:
irrigation; meteorological data; Penman Monteith

Estações	Estado	Latitude	Longitude	Altitude (m)
Mendes	RJ	−22,521° S	−43,721° W	475
Santa Maria Madalena	RJ	−21,953° S	−42,005° W	615
Teresópolis	RJ	−22,407° S	−42,793° W	871
Jerônimo Monteiro	ES	−20,750° S	−41,288° W	146
Sooretama	ES	−19,367° S	−40,074° W	75
Venda Nova Imigrante	ES	−20,384° S	−41,187° W	727

Valor de IC	Desempenho
> 0,85	ótimo
0,76 a 0,85	Muito bom
0,66 a 0,75	Bom
0,61 a 0,65	Mediano
0,51 a 0,60	Sofrível
0,41 a 0,50	Mau
≤ 0,40	Péssimo

Penman-Monteith - ETo – RJ				Med		Max		Min		Desv pad
Mendes				3,49		8,97		0,45		1,70
Santa Maria Madalena				3,96		10,80		0,45		1,78
Teresópolis				3,83		9,86		0,45		1,68
ETo- Estimada	Modelos	Med	Max	Min	Desv pad	(r)	REMQ	EMA	EMP (%)	(D)	(C)
	Hargreaves-Samani	4,45	8,64	1,01	1,40	0,67	1,49	1,17	59,12	0,74	0,50
	Hamon	3,41	7,69	1,27	1,14	0,66	1,27	1,01	45,16	0,76	0,50
Mendes	Jensen-Haise	4,35	13,38	0,02	2,56	0,93	1,42	1,04	28,36	0,89	0,83
	Linacre	4,78	11,61	1,62	1,45	0,78	1,67	1,43	66,45	0,73	0,57
	Benavides-Lopez	5,26	12,89	0,58	1,98	0,79	2,14	1,85	72,27	0,70	0,55
ETo- Estimada	Modelos	Med	Max	Min	Desv pad	(r)	REMQ	EMA	EMP (%)	(D)	(C)
	Hargreaves-Samani	4,15	7,69	0,61	1,31	0,71	1,25	0,97	36,92	0,80	0,57
	Hamon	2,93	5,74	1,28	0,89	0,67	1,70	1,36	36,58	0,59	0,39
Santa Maria Madalena	Jensen-Haise	3,63	11	0,01	2,15	0,81	1,30	0,87	22,88	0,87	0,71
	Linacre	4,58	10,55	1,78	1,32	0,86	1,11	0,90	35,56	0,86	0,74
	Benavides-Lopez	4,83	10,97	0,71	1,72	0,89	1,18	0,94	32,88	0,88	0,79
ETo- Estimada	Modelos	Med	Max	Min	Desv pad	(r)	REMQ	EMA	EMP (%)	(D)	(C)
	Hargreaves-Samani	4,37	8,33	1,13	1,40	0,76	1,21	0,92	35,30	0,83	0,63
	Hamon	2,95	6,27	1,09	0,97	0,71	1,47	1,18	31,88	0,68	0,48
Teresópolis	Jensen-Haise	3,69	9,78	0,02	2,03	0,90	0,90	0,68	19,54	0,93	0,84
	Linacre	4,73	12,03	1,89	1,30	0,85	1,25	1,07	40,53	0,82	0,70
	Benavides-Lopez	4,84	12,82	0,58	1,79	0,85	1,37	1,12	36,78	0,84	0,72

Penman-Monteith - ETo – ES				Med		Max		Min		Desv Pad
Jerônimo Monteiro				4,51		10,76		0,50		2,12
Sooretama				4,60		10,00		0,47		1,76
Venda Nova do Imigrante				3,60		9,32		0,49		1,83
ETo- Estimada	Modelos	Med	Max	Min	Desv pad	(r)	REMQ	EMA	EMP (%)	(D)	(C)
	Hargreaves-Samani	5,09	8,70	1,53	1,47	0,73	1,55	1,16	49,37	0,79	0,58
	Hamon	3,94	9,13	1,55	1,22	0,73	1,58	1,29	39,16	0,75	0,55
Jerônimo Monteiro	Jensen-Haise	5,02	12,79	0,02	2,85	0,93	1,26	0,97	22,65	0,93	0,87
	Linacre	5,53	11,70	2,05	1,68	0,86	1,48	1,25	45,76	0,84	0,73
	Benavides-Lopez	6,68	13,34	1,67	2,17	0,87	2,42	2,18	68,28	0,73	0,63
ETo- Estimada	Modelos	Med	Max	Min	Desv pad	(r)	REMQ	EMA	EMP (%)	(D)	(C)
	Hargreaves-Samani	4,69	8,82	1,45	1,21	0,69	1,28	0,97	30,30	0,78	0,54
	Hamon	3,65	9,02	1,73	0,94	0,70	1,63	1,33	31,03	0,63	0,44
Sooretama	Jensen-Haise	4,46	11,60	0,01	2,40	0,74	1,56	1,16	25,69	0,83	0,62
	Linacre	5,07	12,15	1,66	1,17	0,77	1,21	0,98	29,91	0,81	0,63
	Benavides-Lopez	6,24	13,69	1,12	1,54	0,82	1,92	1,65	48,64	0,71	0,58
ETo- Estimada	Modelos	Med	Max	Min	Desv pad	(r)	REMQ	EMA	EMP (%)	(D)	(C)
	Hargreaves-Samani	4,47	8,54	1,13	1,38	0,79	1,42	1,12	55,21	0,79	0,63
	Hamon	3,03	9,07	1,27	0,97	0,69	1,46	1,17	40,43	0,69	0,48
Venda Nova do Imigrante	Jensen-Haise	3,81	12,61	0,01	2,26	0,94	0,83	0,62	18,61	0,95	0,90
	Linacre	4,62	12,81	1,82	1,38	0,87	1,37	1,16	54,56	0,82	0,72
	Benavides-Lopez	4,93	13,05	0,73	1,91	0,88	1,59	1,35	51,70	0,82	0,73

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[1] Autor de correspondência: Eluã Ramos Coutinho, eluaramos@hotmail.com