Data/hora: 23/06/2024 22:48:41

Biblioteca(s): | Embrapa Territorial.
Data corrente: | 30/11/2015
Data da última atualização: | 17/03/2016
Autoria: | TEIXEIRA, A. H. de C.; LEIVAS, J. F.; ANDRADE, R. G.; HERNANDEZ, F. B. T.
Afiliação: | ANTONIO HERIBERTO DE C TEIXEIRA, CNPM; JANICE FREITAS LEIVAS, CNPM; RICARDO GUIMARAES ANDRADE, CNPM; FERNANDO BRAZ TANGERINO HERNANDEZ, UNESP.
Título: | Water productivity assessments with Landsat 8 images in the Nilo Coelho irrigation scheme.
Ano de publicação: | 2015
Fonte/Imprenta: | Irriga, Botucatu, v. 1, n. 2, edição especial, p. 1-10, 2015.
ISBN: | 1808-8546
Idioma: | Inglês
Conteúdo: | 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.
Palavras-Chave: | Produção de biomassa.
Thesagro: | Evapotranspiração.
Thesaurus Nal: | Biomass production; Evapotranspiration; Land use change.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/134304/1/4629.pdf
Registro original: | Embrapa Territorial (CNPM)
Exemplares: | CNPM - (4628-1) - UPC - AP - DD - 15/129 - AP - 2015.129 - DIS