32 resultados para Valleys.
Resumo:
Pós-graduação em Geociências e Meio Ambiente - IGCE
Resumo:
Pós-graduação em Engenharia Civil - FEIS
Resumo:
Pós-graduação em Agronomia (Energia na Agricultura) - FCA
Resumo:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Resumo:
Pós-graduação em Geologia Regional - IGCE
Resumo:
Pós-graduação em Geografia - IGCE
Resumo:
Este trabalho apresenta as características do meio físico da Bacia do Rio Bacanga, localizada na cidade de São Luís (MA). Dentro da compartimentação geomorfológica regional, a área insere-se no Golfão Maranhense, sendo caracterizada por duas unidades de relevo: colinas dissecadas a partir dos tabuleiros e planícies flúvio-marinhas. Os estudos objetivaram a elaboração de um mapa geológico- geotécnico, fundamentado no método do detalhamento progressivo, sendo integradas as informações geológicas, geomorfológicas e de solos em uma base topográfica na escala de 1:20.000. Para esses estudos foi utilizada como ferramenta principal a fotointerpretação detalhada, associada ao controle de campo e ensaio in situ. No mapa resultante foram caracterizadas seis unidades geológico-geotécnicas: Unidade I – depósitos construídos; Unidade II – áreas planas de fundo de vales; Unidade III – terrenos associados à fácies arenosa da Formação Barreiras; Unidade IV – fácies areno-argilosa da Formação Barreiras; Unidade V – área de domínio da fácies areno-argilosa da Formação Barreiras; Unidade VI – domínio da Formação Itapecuru. Nas unidades foram identificados os processos geológicos e os problemas ambientais que compõem a dinâmica da bacia do Rio Bacanga. O mapa elaborado é uma das ferramentas indispensáveis para subsidiar o planejamento do uso e ocupação do solo. Palavras-chave: mapeamento geológico-geotécnico, relevo de tabuleiro, Rio Bacanga, São Luís (MA).
Resumo:
Far from the continental margin, drainage basins in Central Amazonia should be in topographic steady state; but they are not. Abandoned remnant fluvial valleys up to hundreds of square kilometers in size are observed throughout Amazonia, and are evidence of significant landscape reorganization. While major Late Miocene drainage shifts occurred due to initiation of the transcontinental Amazon River, local landscape change has remained active until today. Driven either by dynamic topography, tectonism, and/or climatic fluctuations, drainage captures in Amazonia provide a natural experiment for assessing the geomorphic response of low-slope basins to sudden, capture related base-level falls. This paper evaluates the timing of geomorphic change by examining a drainage capture event across the Baependi fault scarp involving the Cuieiras and TarumA-Mirim River basins northwest of the city of Manaus in Brazil. A system of capture-related knickpoints was generated by base-level fall following drainage capture; through numerical modeling of their initiation and propagation, the capture event is inferred to have occurred between the middle and late Pleistocene, consistent with other studies of landscape change in surrounding areas. In low-slope settings like the Amazon River basin, base-level fall can increase erosion rates by more than an order of magnitude, and moderate to large river basins can respond to episodes of base-level fall over timescales of tens to hundreds of thousands of years. Copyright (c) 2013 John Wiley & Sons, Ltd.
Resumo:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Resumo:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Resumo:
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Resumo:
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Resumo:
"This paper aims to examine three regional development plans proposed for the region of the valleys of rivers Tietê and Paraná: Rail Project (ISCO, 1994), the Development Plan (CESP, 1996) and Máster Plan (ADTP, 1996). The interest in conducting the study relies on the possibility that it may contribute to the debate on the reshaping of public policy and style necessary to establish a new pattern of regional development in the country"
Resumo:
Aim The aim of the present study was to evaluate the effect of surface roughness (roughness average [Ra] μm) on the hydrophobicity of a denture-base acrylic resin and the initial adherence and biofilm formation of Candida albicans (C. albicans). Methods Disk-shaped specimens were divided into six groups: Ra 0.05, Ra 0.2, Ra 0.4, Ra 0.8, Ra 1.5, and Ra 3.0. Water contact angles (WCA) were measured, and the specimens incubated with C. albicans for 90 min (initial adherence, n = 108) or 48 h (biofilm formation, n = 108). Adhered and biofilm cells were evaluated by c.f.u./mL and 2,3-bis-(2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide (XTT), and the correlation between the two methods was evaluated. The surface of the specimens and cells (adhered and biofilm) were also analyzed by scanning electron microscopy (SEM). Results Groups Ra 0.05 and 3.0 exhibited the lowest (~75°) and the highest (~100°) WCA mean values, respectively. For both initial adherence and biofilm formation, no statistically-significant differences were observed among all groups, as determined by c.f.u./mL and XTT. A positive correlation between these two methods was found. SEM analysis showed the presence of scratches and valleys on the acrylic specimens and densely-packed yeast cells covering the entire surface. Conclusions Roughness significantly increased hydrophobicity (WCA), but had no effect on the number and metabolic activity of adherent and biofilm cells of C. albicans.
Resumo:
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)