Title:	Water productivity assessments with Landsat 8 images in the Nilo Coelho irrigation scheme.
Authors:	TEIXEIRA, A. H. de C. LEIVAS, J. F. ANDRADE, R. G. HERNANDEZ, F. B. T.
Affiliation:	ANTONIO HERIBERTO DE C TEIXEIRA, CNPM; JANICE FREITAS LEIVAS, CNPM; RICARDO GUIMARAES ANDRADE, CNPM; FERNANDO BRAZ TANGERINO HERNANDEZ, UNESP.
Date Issued:	2015
Citation:	Irriga, Botucatu, v. 1, n. 2, edição especial, p. 1-10, 2015.
Description:	The Nilo Coelho (NC) irrigation scheme, located in the Brazilian semi-arid region, is an important irrigated agricultural area. Land use change effects on actual evapotranspiration (ET), biomass production (BIO) and water productivity (WP) were quantified with Landsat 8 images and weather data in this scheme covering different thermohydrological conditions. The SAFER algorithm was used for ET acquirements while the Monteith?s radiation model was applied to retrieve BIO. For classifying irrigated crops and natural vegetation, the SUREAL model was used with a satellite image representing the driest period of the year. The average values for ET, BIO and WP in irrigated crops, ranged, respectively, from 1.6 ± 1.9 to 4.2 ± 1.9 mm day-1; 59 ± 86 to 146 ± 91 kg ha-1 day-1; and 2.0 ± 1.5 to 3.0 ± 1.2 kg m-3. The corresponding ranges for natural vegetation (?Caatinga?) were from 1.2 ± 1.8 to 2.6 ± 1.8 mm day-1; 43 ± 78 to 76 ± 78 kg ha-1 day-1; and 1.6 ± 1.4 to 2.7 ± 1.1 kg m-3. The incremental values, which represent the effects of the replacement of natural vegetation by irrigated crops, were 40, 54 e 23%, for ET, BIO e WP, respectively.
Thesagro:	Evapotranspiração
NAL Thesaurus:	Evapotranspiration Biomass production Land use change
Keywords:	Produção de biomassa
ISBN:	1808-8546
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPM)