Fluvial Processes
Mostrando 13-24 de 54 artigos, teses e dissertações.
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13. Variabilidade climática e correlação entre TSM e vazão fluvial nos rios Amazonas e Negro / Climate variability of the Atlantic and Pacific oceans and flow of the rivers Amazonas and Negro
Climate variability is a complex system generated by the participation of various actors and their role in atmospheric dynamics, the Sea Surface Temperature(SST) plays a key role in influencing the several features of the climate indexes: Southern Hemisphere Cancel Index Mode (SAM), Southern Oscillation Index (SOI), El Nino / Southern Oscillation (ENSO), (TN
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/03/2012
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14. Simulação da dinâmica de carbono em bacias hidrográficas
In most aquatic ecosystems respiration exceeds autochtonous gross primary production leading to a negative net ecosystem production. Recent studies attributes this condition to allochtonous organic matter degradation processes, so the inland water carbon cycle should be linked to the input of organic carbon from the catchment. This work contributes to a bett
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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15. Levantamento dos níveis de radioatividade natural em águas do alto Vale do Ribeira à planície costeira do litoral sul do Estado de São Paulo / Assessment of natural radioctivity levels in waters from Higher Ribeira Valley until the southern Sao Paulo State coastal plain
The complex exchange of fluvial, subsurface and seawater within a coastal area directly affects global biogeochemical cycles and the application of isotopic tracers, mainly natural radionuclides from U and Th series, is a powerful tool to track sources and sinks of trace elements and nutrients to this systems. The unique Ra signature applied to quantify the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/11/2010
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16. Sedimentation processes and beach morphodynamics active at the Doce River mouth, Espírito Santo State, Brazil
A sedimentação costeira adjacente à desembocadura do Rio Doce, Espírito Santo, Brasil destaca o efeito de jato hidráulico desempenhado pela descarga fluvial. Por ocasião da enchente, os sedimentos marinhos transportados pela corrente longitudinal são represados a barlamar da desembocadura, causando progradação nas praias adjacentes e erosão nas pra
Anais da Academia Brasileira de Ciências. Publicado em: 2010-12
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17. Population dynamics of the migratory fish Prochilodus lineatus in a neotropical river: the relationships with river discharge, flood pulse, El Niño and fluvial megafan behaviour
The relative importance of flood pulse dynamics and megafan behaviour for the Sábalo (Prochilodus lineatus) catches in the neotropical Pilcomayo River is studied. The Sábalo catches can mainly be explained by decreased river discharges in the preceding years resulting in smaller inundated areas during rainy season floods and thereby in a decreased area of
Neotropical Ichthyology. Publicado em: 26/02/2010
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18. Aplicação do diagrama de Pejrup na interpretação da sedimentação e da dinâmica do estuário da Baía de Marajó-PA
From statistical parameters of the bottom morphology and of the application of the diagram proposed by Pejrup(1988) it was possible to characterize the dynamic and sedimentary processes that occur in the estuary of the Marajó bay. The sediments that recover the bottom of the studied area are formed by medium to very fine sands that grade to coarse to fine s
Publicado em: 2010
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19. Significado tectônico dos depósitos de leques aluviais da Formação Santa Bárbara (Eo-Paleozóico) na região de Caçapava do Sul (RS, Brasil)
The alluvial fan deposits of Early Paleozoic Santa Bárbara Formation, located in Sul-rio-grandense Shield area of southernmost Brazil, have been analyzed here in terms of facies associations and tectonic significance. The investigated unit comprises conglomerates, sandstones, and siltstones, deposited probably under continental semi-arid climate conditions,
Publicado em: 2010
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20. Caracterização hidrológica e dinâmica do nitrogênio em uma microbacia com cobertura florestal (Mata Atlântica), no Parque Estadual da Serra do Mar, núcleo Santa Virgínia / Hydrological functioning and nitrogen dynamics of a small catchment covered by Atlantic rainforest within the State Park of Serra do Mar, Santa Virgínia Stewardship
A Mata Atlântica, um dos ecossistemas mais ameaçados do planeta, reduzida atualmente a menos de 8% de sua cobertura original, necessita atenção especial em termos de compreensão do seu funcionamento como subsídio para sua melhor conservação. O presente estudo além de expandir a quantidade de estudos realizados nessa região, visou caracterizar o fun
Publicado em: 2010
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21. Tectônica e sedimentação do Grupo Jacadigo (Neoproterozóico, MS) / Tectonics and sedimentation of Jacadigo Group (Neoproterozoic, MS)
At the south of Corumbá, Mato Grosso do Sul state, there are huge topographic elevations made of Jacadigo Groups neoproterozoic sedimentary deposits. Those mountains are known as Maciço do Urucum. The basal unit named Urucum Formation is composed by siliciclastic rocks with maximum thickness of 200 to 300m. The sucession continues with mixed GIF (granular
Publicado em: 2010
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22. Morphological and structural constraints on the dynamics of the river basin of the River Benevente - Espírito Santo / Condicionantes morfológicos e estruturais na dinâmica fluvial da bacia hidrográfica do Rio Benevente - Espírito Santo
The study of watersheds in the humid tropical environment, has acquired great importance in recent decades due to growing demand for water resources planning. However, many studies have confused the concept of watersheds, believing that this was simply a network of interconnected channels that form the hydrography of the land, thus making it as simple cartog
Publicado em: 2009
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23. A influÃncia de detritos lenhosos na morfologia e na sedimentologia de leito no rio Guabiroba, Guarapuava - Pr / The influence of woody debris on morphology and sedimentation in the river bed Guabiroba, Guarapuava - Pr.
Ãrvores, galhos e folhas caÃdos dentro do canal formam um significativo componente do ambiente fluvial e de ocorrÃncia natural em sistemas fluviais que cortam Ãreas florestadas. Toda essa carga de material de origem vegetal que se encontra dentro do canal à chamada de detritos lenhosos. Os detritos lenhosos desempenham funÃÃo chave na ecologia e geomo
Publicado em: 2009
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24. Analise morfodinamica do Rio Mogi Guaçu / Morphodynamics analysis of the Mogi Guaçu River
This study shows that fluvial dynamics of the Mogi Guaçu River (NE State of São Paulo, SE Brazilian) is influenced by hydrographic basin geological structures and lithologies that sustain the river bed. These structures and lithologies affect the shape of the longitudinal profile, changing the relationships between the stream flow dynamics and sedimentary
Publicado em: 2008