Unsaturated Hydraulic Conductivity
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. Physical Properties of Soil Structures Identified by the Profil Cultural under Two Soil Management Systems
ABSTRACT Soil structure plays an important role in water retention, infiltration capacity, porosity, and penetration resistance. The aim of this study was to evaluate the unsaturated hydraulic conductivity and physical properties of Oxisol soils (bulk density and macro-, micro-, and total porosity) in the structures identified using the profil cultural metho
Rev. Bras. Ciênc. Solo. Publicado em: 31/07/2017
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2. Condutividade hidráulica não saturada de um solo arenoso: aplicação do infiltrômetro de disco / Unsaturated hydraulic conductivity of a sandy soil using the disk infiltrometer
A função condutividade hidráulica é um dos parâmetros essenciais para o estudo do fluxo em solos não saturados, permitindo abordar, dentre outros, o avanço da frente de umedecimento e questões como a irrigação e drenagem de solos. Para determinar a condutividade hidráulica não saturada de um solo típico da região Centro-Oeste do Estado de São
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/09/2011
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3. Experimental and numeric analysis of infiltration trenches in unsaturated zone / Análise experimental e numérica de trincheiras de infiltração em meio não saturado
This work assessed the hydraulic behavior of a experimental infiltration trench built at the EESC/USP and proposed a new sizing methodology for infiltration trench, for simulated events. In order to evaluate the hydraulic behavior experimental tests were taken to determine the infiltrated volume. The infiltrated volume was calculated through the difference b
Publicado em: 2009
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4. Influence of the distance of installation of tensiometers to calculate total potential gradient in the field soil hydraulic conductivity determination / Influência da distância de instalação de tensiômetros no campo para o cálculo do gradiente de potencial total no método do perfil instantâneo
The soil hydraulic conductivity determination method most used under unsaturated field conditions is the instantaneous profile method. This method is based on the integration of Richards equation in relation to soil depth, during the soil water redistribution process, after the profile has been saturated till the interest depth and the soil surface prevented
Publicado em: 2009
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5. ANÁLISE DA INFLUÊNCIA DE BARREIRAS HIDRÁULICAS NO PADRÃO DO FLUXO E NA ESTABILIDADE DE TALUDES DE CAVAS A CÉU ABERTO DE MINAS DE FERRO DO QUADRILÁTERO FERRÍFERO, M.G
Less permeable layers, dikes and even discontinuities may act as hydraulic barriers, interfering in the pattern of flow, with dangerous consequences in the stability of the mining slopes. This work intends to analyze the possible influences caused by the phyllites of the Batatal formation, acting as hydraulic barriers, in the flow pattern as well as in the s
Publicado em: 2009
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6. Fuzzy logic applied to the modeling of the transfer of water in soils / LÃgica fuzzy aplicada à modelagem da transferÃncia de Ãgua em solos
Modeling water movement in the unsaturated soil requires a great number of parameters and variables such as the initial soil-water content, the saturated soil-water content, and the saturated hydraulic conductivity, which can relatively easily be assessed. Other functions such as hydraulic conductivity and matric potential which are nonlinear functions of th
Publicado em: 2009
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7. EVAPOTRANSPIRAÇÃO DA MELANCIA IRRIGADA POR MEIO DO SEBAL, BALANÇO HÍDRICO E CORRELAÇÕES TURBULENTAS / ESTIMATING IRRIGATED WATERMELON EVAPOTRANSPIRATION USING SEBAL, SOIL-WATER BALANCE AND EDDY CORRELATIONS
In applications of the SEBAL (Surface Energy Balance Algorithm for Land) algorithm parameters for physical processes adjusted for other regions of the planet are commonly used. Therefore, there is a need for validation of the estimates made with the algorithm compared with other conventional methods of estimating evapotranspiration. Thus, this study main goa
Publicado em: 2009
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8. EVALUATION OF HYDRAULIC PROPERTIES OF UNSATURATED TROPICAL SOILS / AVALIAÇÃO DE PROPRIEDADES HIDRÁULICAS DE SOLOS TROPICAIS NÃO SATURADOS
The present research work had two main objectives. The first was to obtain a geotechnical index for measuring the weathering degree of gneissic residual soils. For that it were analyzed data corresponding to typical weathering profiles found in the municipality of Rio de Janeiro and executed a complete characterization of a specific weathering profile of fac
Publicado em: 2008
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9. NUMERICAL MODELING OF VIRUS TRANSPORT IN FRACTURED-POROUS MEDIA / MODELAGEM NUMÉRICA DO TRANSPORTE DE VÍRUS EM AQÜÍFEROS FRATURADOS - POROSOS
Setback distances of wellhead and catchments from septic tanks are establised by three aproaches: methods based on fixed setback distances or fixed travel times; methods based on vulnerability analysis and methods based on infection risk. In Costa Rica, the determination of setback distances is based on fixed travel times. This approach considers that during
Publicado em: 2008
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10. Estudo das propriedades geotécnicas de solos residuais não saturados de Ubatuba (SP). / Study of the geotechnical properties of unsaturated residual soils of Ubatuba (SP).
This doctoral thesis focusing on the study of the geotechnical properties of unsaturated residual soils occurring in the municipal district of Ubatuba, north coast of the State of Sao Paulo. The study of geotechnical properties was conducted from a macro and micromorfology approach, seeking to establish the relationship between the water present in the resid
Publicado em: 2008
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11. Development of a permeameter for determination of saturated and unsaturated hydraulic conductivity of soils / Desenvolvimento de um permeâmetro para determinação da condutividade hidráulica saturada e não saturada de solos
Quando se projeta uma barragem de terra ou se investiga a estabilidade de um talude é importante que se conheça a condutividade do solo, tanto em condições saturadas, quando em condições não-saturadas. Também, na construção de camadas de impermeabilização construídas na base de aterros industriais, sanitários, etc., é fundamental a determinaç
Publicado em: 2008
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12. Estudo da resistência ao cisalhamento e da condutividade hidráulica de solos coluvionares não saturados da Formação Serra Geral / Shear strength and hydraulic conductivity of unsaturated colluvium soils from Serra Geral Formation
Esta tese apresenta um estudo sobre a resistência ao cisalhamento e a condutividade hidráulica de dois solos coluvionares não saturados situados na divisa dos estados do Rio Grande do Sul e Santa Catarina, em um dos trechos do Gasoduto Bolívia-Brasil. Esses solos são constituídos por sedimentos oriundos da Formação Serra Geral (basalto – Solo RO) e
Publicado em: 2008