| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Territorial. Para informações adicionais entre em contato com cnpm.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Territorial. |
|
Data corrente: |
23/11/2015 |
|
Data da última atualização: |
17/03/2016 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
TEIXEIRA, A. H. de C.; LEIVAS, J. F.; ANDRADE, R. G.; VICTORIA, D. de C.; BOLFE, E. L.; SILVA, G. B. S. da. |
|
Afiliação: |
ANTONIO HERIBERTO DE C TEIXEIRA, CNPM; JANICE FREITAS LEIVAS, CNPM; RICARDO GUIMARAES ANDRADE, CNPM; DANIEL DE CASTRO VICTORIA, CNPM; EDSON LUIS BOLFE, CNPM; GUSTAVO BAYMA SIQUEIRA DA SILVA, CNPM. |
|
Título: |
Water balance indicators from MODIS images and agrometeorological data in Minas Gerais state, Brazil. |
|
Ano de publicação: |
2015 |
|
Fonte/Imprenta: |
Proceedings of SPIE - International Society for Optical Engineering, v. 9637, p. 96370O-1-96370O-14, 2015. |
|
DOI: |
10.1117/12.2194491 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Minas Gerais state, Brazil, has experienced severe water scarcity in some areas, demanding large-scale water balance studies to subsidize water policies. The reflectance bands from the MOD13Q1 MODIS product were used together with gridded agrometeorological data in the state, during the year 2014, later extracting the main agriculture growing regions, North, Northwest and Minas Triangle, for analyzes. Precipitation (Prec) and reference evapotranspiration (ET0) data from 36 weather stations were interpolated, while for actual evapotranspiration (ET), the SAFER (Simple Algorithm for Evapotranspiration Retrieving) algorithm was used. Two climatic water balance indicators were applied, the Water Balance Ratio (WBr = Prec/ET) and the Water Balance Difference (WDd = Prec - ET). The daily net radiation (Rn) was retrieved from surface albedo (α0), air temperature (Ta) and shortwave atmospheric transmissivity (τsw), while the ground heat flux (G) was estimated as a fraction of Rn. For surface moisture, the evapotranspiration ratio (ETr = ET/ET0) and the evaporative fraction [Ef = λE/(Rn - G)] were used, with the latent heat flux (λE) obtained by transforming ET into energy units. Analyzing WDr and WDd, the most water scarcity critical MODIS 16-day periods, reaching to minimum values lower than 1.0 and -10 mm, respectively, were from the end of April to the middle of October. Higher water availability, detected by these indicators larger than 1.5 and 10 mm, respectively, were from the middle of October to the end of December. The maximums WDr and WDd of 7.0 and 158 mm happened from the middle of November to the start of December in the Northwest agricultural growing region. However, according to the ETr and Ef values, after this period, the soil moisture storage showed a gap, increasing only in the second half of December, when they reached to averages of 0.63. The largest values of these last soil moisture indicators, above 0.70 in May, did not coincided with the period of higher Prec, but with the lowest atmospheric demands in all agricultural growing regions, due to a lapse time between the rainfalls and the variation of soil moisture storage. In addition, irrigation should plays a hole in the large-scale water balance. The indicators tested here can be implemented in the Southeast Brazil, for water policies under the actual conditions of water scarcity and competition among water sectors. It was demonstrated the potential to monitor the water conditions for the 16-day periods on a large scale by combining surface-based weather measurements with MODIS remote sensing products. MenosMinas Gerais state, Brazil, has experienced severe water scarcity in some areas, demanding large-scale water balance studies to subsidize water policies. The reflectance bands from the MOD13Q1 MODIS product were used together with gridded agrometeorological data in the state, during the year 2014, later extracting the main agriculture growing regions, North, Northwest and Minas Triangle, for analyzes. Precipitation (Prec) and reference evapotranspiration (ET0) data from 36 weather stations were interpolated, while for actual evapotranspiration (ET), the SAFER (Simple Algorithm for Evapotranspiration Retrieving) algorithm was used. Two climatic water balance indicators were applied, the Water Balance Ratio (WBr = Prec/ET) and the Water Balance Difference (WDd = Prec - ET). The daily net radiation (Rn) was retrieved from surface albedo (α0), air temperature (Ta) and shortwave atmospheric transmissivity (τsw), while the ground heat flux (G) was estimated as a fraction of Rn. For surface moisture, the evapotranspiration ratio (ETr = ET/ET0) and the evaporative fraction [Ef = λE/(Rn - G)] were used, with the latent heat flux (λE) obtained by transforming ET into energy units. Analyzing WDr and WDd, the most water scarcity critical MODIS 16-day periods, reaching to minimum values lower than 1.0 and -10 mm, respectively, were from the end of April to the middle of October. Higher water availability, detected by these indicators larger than 1.5 and 10 mm, respect... Mostrar Tudo |
|
Palavras-Chave: |
Evaporative fraction; Water scarcity. |
|
Thesaurus Nal: |
Evapotranspiration; Water resources. |
|
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
|
Marc: |
LEADER 03432naa a2200241 a 4500
001 2029237
005 2016-03-17
008 2015 bl uuuu u00u1 u #d
024 7 $a10.1117/12.2194491$2DOI
100 1 $aTEIXEIRA, A. H. de C.
245 $aWater balance indicators from MODIS images and agrometeorological data in Minas Gerais state, Brazil.$h[electronic resource]
260 $c2015
520 $aMinas Gerais state, Brazil, has experienced severe water scarcity in some areas, demanding large-scale water balance studies to subsidize water policies. The reflectance bands from the MOD13Q1 MODIS product were used together with gridded agrometeorological data in the state, during the year 2014, later extracting the main agriculture growing regions, North, Northwest and Minas Triangle, for analyzes. Precipitation (Prec) and reference evapotranspiration (ET0) data from 36 weather stations were interpolated, while for actual evapotranspiration (ET), the SAFER (Simple Algorithm for Evapotranspiration Retrieving) algorithm was used. Two climatic water balance indicators were applied, the Water Balance Ratio (WBr = Prec/ET) and the Water Balance Difference (WDd = Prec - ET). The daily net radiation (Rn) was retrieved from surface albedo (α0), air temperature (Ta) and shortwave atmospheric transmissivity (τsw), while the ground heat flux (G) was estimated as a fraction of Rn. For surface moisture, the evapotranspiration ratio (ETr = ET/ET0) and the evaporative fraction [Ef = λE/(Rn - G)] were used, with the latent heat flux (λE) obtained by transforming ET into energy units. Analyzing WDr and WDd, the most water scarcity critical MODIS 16-day periods, reaching to minimum values lower than 1.0 and -10 mm, respectively, were from the end of April to the middle of October. Higher water availability, detected by these indicators larger than 1.5 and 10 mm, respectively, were from the middle of October to the end of December. The maximums WDr and WDd of 7.0 and 158 mm happened from the middle of November to the start of December in the Northwest agricultural growing region. However, according to the ETr and Ef values, after this period, the soil moisture storage showed a gap, increasing only in the second half of December, when they reached to averages of 0.63. The largest values of these last soil moisture indicators, above 0.70 in May, did not coincided with the period of higher Prec, but with the lowest atmospheric demands in all agricultural growing regions, due to a lapse time between the rainfalls and the variation of soil moisture storage. In addition, irrigation should plays a hole in the large-scale water balance. The indicators tested here can be implemented in the Southeast Brazil, for water policies under the actual conditions of water scarcity and competition among water sectors. It was demonstrated the potential to monitor the water conditions for the 16-day periods on a large scale by combining surface-based weather measurements with MODIS remote sensing products.
650 $aEvapotranspiration
650 $aWater resources
653 $aEvaporative fraction
653 $aWater scarcity
700 1 $aLEIVAS, J. F.
700 1 $aANDRADE, R. G.
700 1 $aVICTORIA, D. de C.
700 1 $aBOLFE, E. L.
700 1 $aSILVA, G. B. S. da
773 $tProceedings of SPIE - International Society for Optical Engineering$gv. 9637, p. 96370O-1-96370O-14, 2015.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Territorial (CNPM) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Roraima. |
|
Data corrente: |
28/11/2013 |
|
Data da última atualização: |
14/08/2023 |
|
Tipo da produção científica: |
Orientação de Tese de Pós-Graduação |
|
Autoria: |
LIMA, N. D. |
|
Título: |
Efeito da sucessão de culturas e doses de nitrogênio sobre o rendimento de frutos de melancia. |
|
Ano de publicação: |
2012 |
|
Fonte/Imprenta: |
Boa Vista, RR, 2012. |
|
Páginas: |
48 p. |
|
Descrição Física: |
Dissertação (mestrado) - Universidade Federal de Roraima, 2012. |
|
Idioma: |
Português |
|
Notas: |
Orientador: Dr. Roberto Dantas de Medeiros, Embrapa Roraima. |
|
Palavras-Chave: |
Cobertura de solo. |
|
Thesagro: |
Adubação Verde. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/972398/1/Efeito-da-sucessao-de-culturas-e-doses-de-nitrogenio-sobre-o-rendimento-de-frutos-de-melancia...Lima.pdf
|
|
Marc: |
LEADER 00555nam a2200145 a 4500
001 1972398
005 2023-08-14
008 2012 bl uuuu m 00u1 u #d
100 1 $aLIMA, N. D.
245 $aEfeito da sucessão de culturas e doses de nitrogênio sobre o rendimento de frutos de melancia.$h[electronic resource]
260 $aBoa Vista, RR$c2012
300 $a48 p.$cDissertação (mestrado) - Universidade Federal de Roraima, 2012.
500 $aOrientador: Dr. Roberto Dantas de Medeiros, Embrapa Roraima.
650 $aAdubação Verde
653 $aCobertura de solo
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Roraima (CPAF-RR) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
