Sediment Research
Mostrando 1-12 de 64 artigos, teses e dissertações.
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1. Experimental bedforms by saline density currents
Abstract Bedforms are sedimentary features that can be generated on the seafloor by the interaction between density currents and mobile beds. Developing knowledge about the hydraulic and sedimentary processes involved during these events is in the interest of research groups and oil companies. Because of the magnitude of the density currents in its natural e
Braz. J. Geol.. Publicado em: 20/05/2019
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2. Frequency of mentum deformity in Chironomus sancticaroli (Diptera: Chironomidae) in a laboratory culture
Resumo A espécie Chironomus sancticaroli (Diptera: Chironomidae) tem sido utilizada em testes ecotoxicológicos por ser sensível a uma variedade de poluentes inorgânicos. Um dos parâmetros utilizados para avaliar a toxicidade de uma substância é a frequência de deformidade do mento, que faz parte do sistema oral deste organismo. Entretanto, ainda não
Rev. Ambient. Água. Publicado em: 01/04/2019
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3. Potentially mobile of heavy metals on the surface sediments in tropical hyper-saline and positive estuaries
ABSTRACT Estuarine sediments represent important pools of trace metals, released from both anthropogenic and natural sources. Fluctuations in the water column physicochemical conditions, on the other hand, may transfer metals from solid to liquid compartment and resulting in contamination of the surrounding environment. The present research was carried out t
An. Acad. Bras. Ciênc.. Publicado em: 2017-12
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4. CLAY AND PHOSPHORUS LOSSES BY EROSION IN OXISOL WITH SUGARCANE RESIDUES
ABSTRACT Considering the importance of nutrients in the soil for the plants development and the soil quality conservation and the quantification relevance of them for proper soil management, the aims of this research were: (i) to quantify the clay loss, adsorbed and soluble P from interrill erosion influenced by the presence of sugarcane residues on the grou
Eng. Agríc.. Publicado em: 2016-12
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5. Water erosion in surface soil conditions: runoff velocity, concentration and D50 index of sediments in runoff
ABSTRACT Water erosion and contamination of water resources are influenced by concentration and diameter of sediments in runoff. This study aimed to quantify runoff velocity and concentration and the D50 index of sediments in runoff under different soil surface managements, in the following treatments: i) cropped systems: no-tilled soil covered by ryegrass (
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-06
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6. Avaliação e quantificação da contribuição de uma voçoroca para o assoreamento do Ribeirão das Cruzes, tributário da represa de Três Irmãos, SP / Assessment and quantification of a gully erosion contribution to the Ribeirão das Cruzes siltation, a tributary of the Três Irmãos dam, SP
Devido a dificuldade em se modelar a contribuição de aporte de sedimentos provenientes de erosões lineares em uma bacia hidrográfica, muitas vezes estes são desconsiderados nos estudos hidrossedimentológicos, contudo, podem corresponder a parcela significativa do assoreamento. O presente projeto analisou como a contribuição de uma voçoroca no munic�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/06/2012
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7. Avaliação da contaminação de córregos de Cerrado por metais pesados utilizando-se larvas de Odonata como bioindicadores / Assessment of heavy metal contamination in Brazilian savannas streams using Odonata larvae as bioindicators
The aquatic ecosystems are the main receptors of pollutants and contaminants from industrial and agricultural activities and of the discharge of sewage. Among the various substances potentially harmful, heavy metals are a threat to the aquatic ecosystems and the biota. This research aimed to evaluate the contamination of Cerrados streams by heavy metals usin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012
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8. Personagens emolduradas: os discursos de gênero e sexualidade no Big Brother Brasil 10 / Characters in frames: Gender and Sexuality discourses in Big Brother Brasil 10
Open your eyes and see. There is nothing more incredible than the act of visualizing the innumerous possibilities that are before our eyes: images, they are more than a combination of colors and forms, they produce meanings and, logically, symbols. From this production of images some questions can be raised, such as, what do they want to represent? This diss
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/09/2011
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9. Diagnóstico ambiental das bacias hidrográficas que deságuam no trecho de Vazão Reduzida da Usina Hidrelétrica Amador Aguiar I, Uberlândia MG
The goal of this study is to make an environmental assessment of the hydrographic basin that disembogues into Trecho de Vazão Reduzida (TVR) of the electric plant of Amador Aguiar as a tool for environmental management. To achieve this goal, several studies such as watershed morphometry, flow monitoring, water quality, precipitation and finally, mapping the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/04/2011
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10. Sedimentary characteristics and their effects on hatching success and incubation duration of Caretta caretta (Testudines: Cheloniidae) in Espirito Santo, Brazil
The beaches of Espírito Santo encompass the most important nesting sites of the loggerhead sea turtle, Caretta caretta (Linnaeus, 1758), in the South Atlantic Ocean. Previous research has shown that, unlike other nesting sites in Brazil, Espírito Santo harbors a large percentage of male individuals, which play an important role in maintaining the equilibri
Zoologia (Curitiba). Publicado em: 2011-06
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11. Impacto de condicionantes hidrológicas na definição de traçados rodoviários : aplicação na rodovia TO-247
The contribution of this research is given by the design of effective impacts of highways, through the expansion of the influence areas beyond the linear tracks, adding the assessment of the environmental sensitivity of watersheds in order to optimize the layout of road projects. It was produced an orderly and systematic approach of the cause and consequence
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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12. Desenvolvimento e aplicação de procedimento metodológico em suporte ao planejamento participativo para redução de perda de solos em pequenas bacias hidrográficas com emprego da EUPS
The agrosilvipastoral activity has impacted negatively the environment worldwide, promoting soil erosion and sediment settling in water bodies. The Universal Soil Loss Equation (USLE) estimates the rates of laminar erosion (A; in ton/acre/year) by the multiplication of six parameters: A = RKLSCP (R: rainfall erosivity factor; K = soil erodibility factor; S:
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2010