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Registro Completo |
Biblioteca(s): |
Embrapa Territorial. |
Data corrente: |
21/11/2013 |
Data da última atualização: |
21/11/2013 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
TEIXEIRA, A. H. de C.; SCHERER-WARREN, M.; HERNANDEZ, F. B. T.; ANDRADE, R. G.; LEIVAS, J. F. |
Afiliação: |
ANTONIO HERIBERTO DE C TEIXEIRA, CNPM; MORRIS SCHERER-WARREN, ANA; FERNANDO B. T. HERNANDEZ, UNESP; RICARDO GUIMARAES ANDRADE, CNPM; JANICE FREITAS LEIVAS, CNPM. |
Título: |
Large-scale water productivity assessments with MODIS images in a changing semi-arid environment: a Brazilian case study. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
Remote Sensing, v. 11, n. 3, p. 5783-5804, 2013. |
ISBN: |
2072-4292 |
DOI: |
10.3390/rs5115783 |
Idioma: |
Português |
Conteúdo: |
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. MenosIn 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 a... Mostrar Tudo |
Palavras-Chave: |
Net radiation; Surface resistance. |
Thesaurus Nal: |
Biomass production; Evapotranspiration. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/92867/1/remotesensing-05-05783.pdf
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Marc: |
LEADER 02516naa a2200241 a 4500 001 1971815 005 2013-11-21 008 2013 bl uuuu u00u1 u #d 022 $a2072-4292 024 7 $a10.3390/rs5115783$2DOI 100 1 $aTEIXEIRA, A. H. de C. 245 $aLarge-scale water productivity assessments with MODIS images in a changing semi-arid environment$ba Brazilian case study.$h[electronic resource] 260 $c2013 520 $aIn 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. 650 $aBiomass production 650 $aEvapotranspiration 653 $aNet radiation 653 $aSurface resistance 700 1 $aSCHERER-WARREN, M. 700 1 $aHERNANDEZ, F. B. T. 700 1 $aANDRADE, R. G. 700 1 $aLEIVAS, J. F. 773 $tRemote Sensing$gv. 11, n. 3, p. 5783-5804, 2013.
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Embrapa Territorial (CNPM) |
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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Instrumentação. |
Data corrente: |
19/09/2006 |
Data da última atualização: |
19/09/2006 |
Autoria: |
COLNAGO, L. A.; OSTE, R. |
Título: |
Construção de um imã de alnico V para RMN. |
Ano de publicação: |
1997 |
Fonte/Imprenta: |
In: SIMPOSIO NACIONAL DE INSTRUMENTACAO AGROPECUARIA, 1., 1996, Sao Carlos. Anais do I SIAGRO. Brasilia: EMBRAPA-SPI, 1997. |
Páginas: |
p. 164-168. |
Idioma: |
Português |
Categoria do assunto: |
-- |
Marc: |
LEADER 00429naa a2200133 a 4500 001 1029906 005 2006-09-19 008 1997 bl --- 0-- u #d 100 1 $aCOLNAGO, L. A. 245 $aConstrução de um imã de alnico V para RMN. 260 $c1997 300 $ap. 164-168. 700 1 $aOSTE, R. 773 $tIn: SIMPOSIO NACIONAL DE INSTRUMENTACAO AGROPECUARIA, 1., 1996, Sao Carlos. Anais do I SIAGRO. Brasilia: EMBRAPA-SPI, 1997.
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Embrapa Instrumentação (CNPDIA) |
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