Suspended Sediment
Mostrando 25-36 de 69 artigos, teses e dissertações.
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25. AVALIAÇÃO DA PRODUÇÃO DE SEDIMENTOS EM EVENTOS CHUVOSOS NA BACIA HIDROGRÁFICA EXPERIMENTAL DE SÃO MARTINHO DA SERRA. / EVALUATION OF THE PRODUCTION OF SEDIMENTS IN RAINFALL EVENTS IN SÃO MARTINHO DA SERRA EXPERIMENTAL BASIN
The intense use of the soil and natural resources emphasizes the importance of researching fields related to sediment transport and sediment deposition in catchments. Consequently sediment yield is object of concern in situations regarding the land se and water resources management. The main objective of this research was to evaluate the sediment yield at Sa
Publicado em: 2007
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26. Efeitos da dragagem sobre a qualidade de sedimentos contaminados do canal do porto de Santos : biodisponibilidade e toxicidade de metais e compostos orgânicos persistentes / Effects of dredging on the quality of contaminated Sediments from the channel of the port of santos: Bioavailability and toxicity of metals and persistent Organic compounds
Contaminated sediments is a worldwide problem, and mobilization of contaminants is one of the most critical issue in environmental risk assessment when dredging projects are concerned. Considering this, we decided to investigate if and how toxic metals and persistent organic compounds such as PAH and PCB are mobilized during dredging operations in the Port o
Publicado em: 2007
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27. THE UNSUSTAINABILITY OF SOIL USE WITH TABACCO CROP ON STEEP SLOPES / A INSUSTENTABILIDADE DO USO DO SOLO COM FUMICULTURA EM TERRAS DECLIVOSAS
Areas susceptibility to water erosion and strong pressure of soil use, as in Southern Brazil, where there is cultivation of tobacco, are prone to degradation of the natural resources. The objective of this dissertation was to evaluate the unsustainability of the natural resources in a watershed under tobacco production, characterized by steep slopes, with in
Publicado em: 2007
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28. Análise e estimativa do transporte de sedimentos em suspensão durante eventos chuvosos / Analysis and estimation of suspended sediment transport throughout rainy events
Este trabalho tem por objetivo monitorar o transporte de sedimentos suspensos provenientes da bacia hidrográfica do Rio Taquarizinho, durante os eventos chuvosos ocorridos no período compreendido entre 2005 e 2007. Por meio de levantamento de dados históricos, foi avaliado a evolução das cotas linimétricas, vazões e perfis transversais ao longo das ú
Publicado em: 2007
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29. Avaliação de impactos ambientais nos tributários do lago Paranoá, Brasília - DF
The high level of urbanization in Distrito Federal in Brazil is contributing to modify the environment particularly the quality of surface water resources. The historical of environment aggression to the Paranoá Lake through urban expansion, land use and land occupation, is studied as environmental changes. In this work, physical-chemistry conditions and ge
Publicado em: 2007
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30. The study transport of suspended sediment in the descoberto river watershed. / Estudo do transporte de sedimentos em suspensão na Bacia do Rio Descoberto
In this study, sedimentometric data were collected in streams located upstream and downstream the Descoberto reservoir, with the objective of improving the knowledge about the sediment transport in this watershed. Monthly data collection campaigns from June-2005 to February-2006 were carried out to determine suspended sediments loads using a depth sampler, t
Publicado em: 2006
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31. AplicaÃÃo de um modelo paramÃtrico para a estimativa do transporte de sedimentos arenosos na Bacia de Campos / Application of a parametric model to assess the sandy sediment transport in the Campos Basin
Studies about sediment transport processes that occur in the Campos Basin are of great importance, since they can contribute for example to improve the comprehension of how the sedimentary deposits, that are potential oil reservoirs, take form or to provide elements that can help to understand the changes in marine bed forms on areas where submarine pipeline
Publicado em: 2006
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32. ACUMULAÇÃO E BALANÇO DE SEDIMENTOS EM SUPERFÍCIES ASFÁLTICAS EM ÁREA URBANA DE SANTA MARIA - RS / SEDIMENT ACUMULATION AND BALANCE ON ASPHALTED SURFACES ON AN URBAN AREA IN SANTA MARIA - RS
This paper presents the results from a street gutter sediment characterization study in two asphalted streets in Santa Maria - RS. It also presents the results from the samples collected at the station installed at the outlet of a drainage system. One of the dry sampled streets is the contribution area of the system. The field and laboratory tests were accom
Publicado em: 2006
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33. ESTERÓIS COMO MARCADORES MOLECULARES DA CONTAMINAÇÃO FECAL NO SISTEMA ESTUARINO IGUAÇU-SARAPUÍ, NOROESTE DA BAÍA DE GUANABARA (RJ) / STEROLS AS MOLECULAR MARKERS OF FECAL POLLUTION IN IGUAÇU-SARAPUÍ ESTUARINE SYSTEM, GUANABARA BAY NORTHEAST (RJ)
The contamination by domestic sewage of the Iguaçu River and Sarapuí channel, located in the north-western sector of Guanabara Bay, was investigated by the determination of sterols and elemental composition (C and N) of organic matter in suspended matter and superficial sediments. Physico-chemical and chemical characterization of water and sediments were c
Publicado em: 2006
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34. Espécies químicas inorgânicas (Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb e Sn) no sedimento e nos sólidos em suspensão do rio Corumbataí, SP / Inorganic chemical species (Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb e Sn) in sediment and suspended matter in the Corumbataí River, SP.
Os teores totais e trocáveis de alumínio, arsênio, cádmio, cobre, ferro, manganês, mercúrio, níquel, chumbo e estrôncio, foram determinados em amostras de sedimento do rio Corumbataí. As leituras para quantificação dos elementos foram feitas por espectrometria de emissão atômica com plasma acoplado indutivamente (ICP-AES), análise por ativaçã
Publicado em: 2006
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35. Study of amazon floodplain water composition using hyperion/EO-1 and field reflectance data for the comprehension of temporal variability of optically active constituents / Estudo da composição das águas da planície amazônica por meio de dados de reflectância do sensor hyperion/EO-1 e de espectrômetro de campo visando a compreensão da variação temporal dos seus constituintes opticamente ativos
Two methodological approaches were evaluated to study the reflectance of optically active constituents using hyperspectral imagery of EO-1 Hyperion orbital sensor: a) Linear Spectral Mixture Model; and b) derivative analysis. Two Hyperion images acquired over an area located upstream of the confluence between the Amazon and the Tapajós rivers were analysed,
Publicado em: 2006
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36. "Rio Grande Reservoir: limnological characteristics of the water and metal bioavailability in sediment." / "Reservatório Rio Grande: caracterização limnológica da água e biodisponibilidade de metais-traço no sedimento"
The Rio Grande branch is a part of Billings Complex and is isolated from the central body by Anchieta Dam. This reservoir is located in São Paulo Metropolitan Region and has multiple uses, including water supply, recreation, leisure, receptor of domestic and industrial wastewater. At the present work, the water column was studied in 6 stations along the res
Publicado em: 2006