Fluvial Sedimentation
Mostrando 1-12 de 23 artigos, teses e dissertações.
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1. Study of fluvial water treatability using γ-polyglutamic acid based biopolymer coagulant
Abstract: Successful treatment of surface water for public use requires the evaluation of raw water and coagulant efficacy. The purpose of water treatment is to remove impurities, allowing its quality to be classified to meet the needs of the population. The conditions of urban rivers that flow though the city of São Paulo, which were already undergoing maj
An. Acad. Bras. Ciênc.. Publicado em: 02/09/2019
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2. Genesis and Classification of Sodic Soils in the Northern Pantanal
ABSTRACT The simultaneous occurrence of high levels of exchangeable sodium percentage (ESP) and alkalinity in soils imposes restrictions on plant development and affects physical properties such as porosity, bulk density, permeability, and hydraulic conductivity. Although sodic soils are frequent in the flood plain of the São Lourenço River, northern Panta
Rev. Bras. Ciênc. Solo. Publicado em: 02/10/2017
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3. Estudo palinoestratigráfico e de petrografia orgânica do Cretáceo inferior da Bacia do Recôncavo / Palynostratigraphic and organic petrography studies of the Recôncavo basin early Cretaceous deposits
The present study was based on vertical variations analysis of the organic matter from 50 core samples collected from the well 9-FBA-61-BA, allowing better understanding of the Early Cretaceous of Reconcavo Basin palynological and palynofacies characteristics. Observations throughout combined light and blue light/UV fluorescence techniques, permitted to defi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2011
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4. Impactos Socioambientais no EstuÃrio do Rio Jaguaribe: o Caso da Cidade de Aracati-Ce. / Social and Environmental Impacts on River Estuary Jaguaribe: If the City Aracati-Ce.
The Jaguaribe River was fundamental to the development of the city of Aracati. However, during recent decades a degradation of the fluvial and marine ecosystems caused by several environmental impacts has been perceived. Analyzing the social and environmental impacts at the estuary of the Jaguaribe River, highlighting the process of urban expansion from 1980
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/04/2010
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5. 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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6. 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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7. Tectônica e sedimentação na Bacia do Camaquã Central (RS): exemplos do Grupo Guaritas e do Grupo Santa Bárbara / Tectonics and sedimentation in Central Camaquã Basin: the Guaritas Group and the Santa Bárbara Group
The relationship between tectonics and sedimentation plays a primordial role in the understanding of sedimentary successions. On the other hand, the study of pre-Silurian fluvial deposits represents a challenge due to the lack of interaction between land plants and river systems which characterizes post-Silurian environments. The Camaquã Basin (Ediacaran to
Publicado em: 2010
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8. 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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9. 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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10. História paleoambiental neopleistocena-holocena, do médio Vale do Rio Paraíba do Sul, Estado de São Paulo: com base na análise da palinoflora.
This paper is about palynological studies realized at Paraíba do Sul river floodplain, in São Paulo. The hole made by vibro-core reached 390 cm depth. The core showed two very similar sedimentation cycles represented by sand in the basis, followed by clay and peat on the top. Besides, the second sequence presents one clay layer on the peat. The first seque
Publicado em: 2009
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11. Evolution of holocene lagunar sedimentation in Jaguaruna, Santa Catarina State, Brazil: a sedimentary and micropaleontological approach / Evolução da sedimentação lagunar holocênica na região de Jaguaruna, Estado de Santa Catarina: uma abordagem sedimentológica-micropaleontológica integrada
O estudo de três testemunhos rasos (até 2,5m de profundidade) coletados na região de Jaguaruna, litoral centro-sul de Santa Catarina, permitiu reconstituir parte da história de evolução sedimentar holocênica na área. Para isso, foi feita a análise integrada de quatro tipos de variáveis: sedimentológicas, diatomológicas, palinológicas e geoquími
Publicado em: 2008
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12. Geoquímica de fósforo como indicadora da qualidade ambiental e dos processos estuarinos do Rio Jaguaribe - costa nordeste oriental brasileira
Phosphorus geochemistry as a proxy of environmental estuarine processes at the Jaguaribe River, Northeastern Brazil. Sedimentation of different phosphorus geochemical fractions can characterize the natural or anthropogenic processes dominant in the watershed. Selective chemical extraction of different phosphorus geochemical forms in estuarine sediments showe
Química Nova. Publicado em: 2007-10