Large-scale water productivity assessments with MODIS images in a changing semi-arid environment: a Brazilian case study.

TEIXEIRA, A. H. de C.; SCHERER-WARREN, M.; HERNANDEZ, F. B. T.; ANDRADE, R. G.; LEIVAS, J. F.

Por favor, use este identificador para citar o enlazar este ítem: http://www.alice.cnptia.embrapa.br/alice/handle/doc/971815

Registro completo de metadatos

Campo DC	Valor	Lengua/Idioma
dc.contributor.author	TEIXEIRA, A. H. de C.	pt_BR
dc.contributor.author	SCHERER-WARREN, M.	pt_BR
dc.contributor.author	HERNANDEZ, F. B. T.	pt_BR
dc.contributor.author	ANDRADE, R. G.	pt_BR
dc.contributor.author	LEIVAS, J. F.	pt_BR
dc.date.accessioned	2013-11-21T11:11:11Z	pt_BR
dc.date.available	2013-11-21T11:11:11Z	pt_BR
dc.date.created	2013-11-21	pt_BR
dc.date.issued	2013	pt_BR
dc.identifier.citation	Remote Sensing, v. 11, n. 3, p. 5783-5804, 2013.	pt_BR
dc.identifier.isbn	2072-4292	pt_BR
dc.identifier.uri	http://www.alice.cnptia.embrapa.br/alice/handle/doc/971815	pt_BR
dc.description	In the Brazilian semi-arid region, the intensification of agriculture results in a change of natural vegetation by irrigated crops. To quantify the contrast between these two ecosystems, the large-scale values of water productivity components were modelled in Petrolina (PE) and Juazeiro (BA) municipalities. The SAFER (Simple Algorithm For Evapotranspiration Retrieving) algorithm was used to acquire evapotranspiration (ET), while the Monteith's radiation model was applied for estimating the biomass production (BIO). Moderate Resolution Imaging Spectroradiometer (MODIS) satellite images were used together with agro-meteorological data. In Petrolina and Juazeiro, the mean monthly ET values for irrigated crops were 938 and 739 mm·month−1, with the corresponding ones for natural vegetation of 385 and 194 mm·month−1.Water productivity (WP) was analysed by the ratio of BIO to ET, defined here as the ratio of the net benefits from the mixed agricultural systems to the amount of water required for producing those benefits. The highest incremental WP values, as a result of the irrigated crops introduction, happened outside the rainy period. More spatial WP uniformity occurred in natural vegetation, when comparing with irrigated crops. The most frequent WP values in Petrolina were between 1.6 and 2.2 kg·m−3 while in Juazeiro this range was from 1.0 to 1.6 kg·m−3. The differences between the municipalities can be mainly explained by differences in precipitation and soil water storages conditions, promoting better rainfall use efficiency by the natural vegetation in the first one. The results of the current research are important for appraising the land use change impacts in situations of expanding irrigation areas.	pt_BR
dc.language.iso	por	pt_BR
dc.rights	openAccess	pt_BR
dc.subject	Net radiation	pt_BR
dc.subject	Surface resistance	pt_BR
dc.title	Large-scale water productivity assessments with MODIS images in a changing semi-arid environment: a Brazilian case study.	pt_BR
dc.type	Artigo de periódico	pt_BR
dc.date.updated	2013-11-21T11:11:11Z	pt_BR
dc.subject.nalthesaurus	Evapotranspiration	pt_BR
dc.subject.nalthesaurus	Biomass production	pt_BR
riaa.ainfo.id	971815	pt_BR
riaa.ainfo.lastupdate	2013-11-21	pt_BR
dc.identifier.doi	10.3390/rs5115783	pt_BR
dc.contributor.institution	ANTONIO HERIBERTO DE C TEIXEIRA, CNPM; MORRIS SCHERER-WARREN, ANA; FERNANDO B. T. HERNANDEZ, UNESP; RICARDO GUIMARAES ANDRADE, CNPM; JANICE FREITAS LEIVAS, CNPM.	pt_BR
Aparece en las colecciones:	Artigo em periódico indexado (CNPM)

Ficheros en este ítem:

Fichero	Descripción	Tamaño	Formato
remotesensing0505783.pdf		1.46 MB	Adobe PDF	Visualizar/Abrir

Mostrar el registro sencillo del ítem