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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
16/02/1996 |
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Data da última atualização: |
04/04/2017 |
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Autoria: |
HAMILTON, S. K.; SOUZA, O. C. de; COUTINHO, M. E. |
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Afiliação: |
Marine Science Institute. University of Californaia at Santa Barbara (Santa Barbara, CA, USA). EMBRAPA. Centro de Pesquisa Agropecuaria do Pantanal (Corumba, MS). |
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Título: |
Dynamics of floodplain inundation in the alluvial fan of the Taquari river (Pantanal, Brazil). |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Verhandlungen International Vereiniging Limnology, v.26, p.916-922, 1998. |
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Idioma: |
Inglês |
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Conteúdo: |
The Taquari River flows across an immense alluvial fan of>50.000 km2, most of which is subject to seasonal inundadtion and is covered by sandy soils and savanna vegetation. Sampling at the mouth of the river over the course of the year showed that the turbid waters of the Taquari lose nearly all of their sediment load before reaching the Paraguay River because they they become impounded in an internal delta of anastomosed channels and luxuriant semiaquatic vegetation. Across much of the alluvial fan, however, local rainfall rather than the Taquari River is the source of seasonal flooding, and this imparts some important hydrological and ecological differences to the floodplain. The chemical composition of rainfall-dominanted floodwaters differs from that of the river and major ion data sites acros the region reveal the origin of the waters as well as the degree of avapoconcentration occurring along floodplain flow paths. Differences in inundation dynamics between river and rainfall-dominated floodplain are revealed by passive microwaye satellite data, which provide a 9-year time series of inundation intensity at monthly resolution. Human impacts on the inundation dynamics have occured through damming of openings along the riverr levees and possibility through increased erosions as the upland drainage basin has been converted to agricultural use. These actions have a potentially serious effect on the ecology of the floodplains. |
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Palavras-Chave: |
Area alagada; Conservation; Floodplain; Inundation; Rio Taquari; Taquari river. |
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Thesagro: |
Conservação; Ecossistema; Inundação. |
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Thesaurus Nal: |
Pantanal. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02190naa a2200265 a 4500
001 1787360
005 2017-04-04
008 1998 bl --- 0-- u #d
100 1 $aHAMILTON, S. K.
245 $aDynamics of floodplain inundation in the alluvial fan of the Taquari river (Pantanal, Brazil).
260 $c1998
520 $aThe Taquari River flows across an immense alluvial fan of>50.000 km2, most of which is subject to seasonal inundadtion and is covered by sandy soils and savanna vegetation. Sampling at the mouth of the river over the course of the year showed that the turbid waters of the Taquari lose nearly all of their sediment load before reaching the Paraguay River because they they become impounded in an internal delta of anastomosed channels and luxuriant semiaquatic vegetation. Across much of the alluvial fan, however, local rainfall rather than the Taquari River is the source of seasonal flooding, and this imparts some important hydrological and ecological differences to the floodplain. The chemical composition of rainfall-dominanted floodwaters differs from that of the river and major ion data sites acros the region reveal the origin of the waters as well as the degree of avapoconcentration occurring along floodplain flow paths. Differences in inundation dynamics between river and rainfall-dominated floodplain are revealed by passive microwaye satellite data, which provide a 9-year time series of inundation intensity at monthly resolution. Human impacts on the inundation dynamics have occured through damming of openings along the riverr levees and possibility through increased erosions as the upland drainage basin has been converted to agricultural use. These actions have a potentially serious effect on the ecology of the floodplains.
650 $aPantanal
650 $aConservação
650 $aEcossistema
650 $aInundação
653 $aArea alagada
653 $aConservation
653 $aFloodplain
653 $aInundation
653 $aRio Taquari
653 $aTaquari river
700 1 $aSOUZA, O. C. de
700 1 $aCOUTINHO, M. E.
773 $tVerhandlungen International Vereiniging Limnology$gv.26, p.916-922, 1998.
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Registro original: |
Embrapa Pantanal (CPAP) |
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Origem |
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Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
18/03/2023 |
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Data da última atualização: |
18/03/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
COUTO JUNIOR, A. F.; MENESES, P. R.; SANO, E. E. |
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Afiliação: |
ANTONIO FELIPE COUTO JUNIOR, UNIVERSIDADE DE BRASÍLIA; PAULO ROBERTO MENESES, UNIVERSIDADE DE BRASÍLIA; EDSON EYJI SANO, CPAC. |
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Título: |
Uso de Radar de Abertura Sintética e Índices de Vegetação para Discriminação de Alvos no Bioma Cerrado. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
In: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 15., 2011, Curitiba. Anais... São José dos Campos: INPE, 2011. |
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Páginas: |
p. 8075-8082 |
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Idioma: |
Português |
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Notas: |
SBSR 2011 |
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Conteúdo: |
ABSTRACT -This work aimed to evaluate the differences and complementarities between the Phased Array Type L-band Synthetic Aperture (PALSAR) and the vegetation indices derived from the Landsat 7-ETM imagery to discriminate land cover in the Cerrado biome. The ALOS-PALSAR digital numbers were converted into backscattering coefficients ( o°; units = dB) and resampled to 30 meter spatial resolution to match with spatial resolution of Landsat data. Two vegetation indices (NDVI and EVI) were generated after the MODTRAN-based atmospheric correction. For the discrimination assessment, the Tukey test and the Analysis of Variance (ANOVA) were applied with significance level of 0.05. Samples were collected from two different land cover types: 1) natural vegetation (forestlands, shrublands and grasslands); 2) antropic vegetation (croplands, consolidated urban areas, unconsolidated urban areas and reforestations). L-band SAR images with HH, HV and VV polarizations showed low correlations with the vegetation indices. The ANOVA showed that the HH and VV exhibited the lower F values and the Tukey test evidenced that the vegetation indices were more efficient in the discrimination. The two sensors seemed to be complementary for land cover discrimination in the Cerrado. In this way, for further studies in this biome it is important to consider the following combinations: HV+NDVI, VV+EVI and HH+NDVI |
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Palavras-Chave: |
Polarização cruzada. |
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Thesagro: |
Biomassa; Cerrado; Radar; Sensoriamento Remoto; Vegetação. |
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Thesaurus NAL: |
Remote sensing; Savannas; Sensors (equipment); Vegetation index. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1152488/1/Uso-radar-abertura-sintetica-2011.pdf
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Marc: |
LEADER 02272nam a2200277 a 4500
001 2152488
005 2023-03-18
008 2011 bl uuuu u00u1 u #d
100 1 $aCOUTO JUNIOR, A. F.
245 $aUso de Radar de Abertura Sintética e Índices de Vegetação para Discriminação de Alvos no Bioma Cerrado.$h[electronic resource]
260 $aIn: SIMPÓSIO BRASILEIRO DE SENSORIAMENTO REMOTO, 15., 2011, Curitiba. Anais... São José dos Campos: INPE$c2011
300 $ap. 8075-8082
500 $aSBSR 2011
520 $aABSTRACT -This work aimed to evaluate the differences and complementarities between the Phased Array Type L-band Synthetic Aperture (PALSAR) and the vegetation indices derived from the Landsat 7-ETM imagery to discriminate land cover in the Cerrado biome. The ALOS-PALSAR digital numbers were converted into backscattering coefficients ( o°; units = dB) and resampled to 30 meter spatial resolution to match with spatial resolution of Landsat data. Two vegetation indices (NDVI and EVI) were generated after the MODTRAN-based atmospheric correction. For the discrimination assessment, the Tukey test and the Analysis of Variance (ANOVA) were applied with significance level of 0.05. Samples were collected from two different land cover types: 1) natural vegetation (forestlands, shrublands and grasslands); 2) antropic vegetation (croplands, consolidated urban areas, unconsolidated urban areas and reforestations). L-band SAR images with HH, HV and VV polarizations showed low correlations with the vegetation indices. The ANOVA showed that the HH and VV exhibited the lower F values and the Tukey test evidenced that the vegetation indices were more efficient in the discrimination. The two sensors seemed to be complementary for land cover discrimination in the Cerrado. In this way, for further studies in this biome it is important to consider the following combinations: HV+NDVI, VV+EVI and HH+NDVI
650 $aRemote sensing
650 $aSavannas
650 $aSensors (equipment)
650 $aVegetation index
650 $aBiomassa
650 $aCerrado
650 $aRadar
650 $aSensoriamento Remoto
650 $aVegetação
653 $aPolarização cruzada
700 1 $aMENESES, P. R.
700 1 $aSANO, E. E.
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