Vadose Zone
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Hydrostatic Equilibrium between Soil Samples and Pressure Plates Used in Soil Water Retention Determination: Consequences of a Questionable Assumption
ABSTRACT Soil water retention is among the soil hydraulic properties most routinely measured in studies of soil physics and related areas. This property is used in dynamic simulations of vadose zone processes such as soil water availability, surface boundary processes of evaporation and infiltration, and the fate of soil pollutants. The most common measureme
Rev. Bras. Ciênc. Solo. Publicado em: 29/07/2019
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2. Performance of the Groenevelt and Grant Model for Fitting Soil Water Retention Data from Brazilian Soils
ABSTRACT The soil water retention curve (SWRC) is essential for vadose zone hydrological modeling and related applications. In 2004, Groenevelt and Grant (GRT) presented a mathematical model for describing the SWRC and reported its mathematical versatility and good fit to soils from a Dutch database. In order to evaluate the application of GRT to SWRCs of Br
Rev. Bras. Ciênc. Solo. Publicado em: 22/07/2019
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3. Avaliação de métodos de campo para a determinação de condutividade hidráulica em meios saturados e não saturados
The determination of the hydraulic conductivity of saturated insaturated media for hydrogeologic research is a frequent activity, to academic studies and for practical works. This hydrodynamic parameter is determined by in situ measures, for the insaturated zone the concentric rings and open end hole methodologies are applied and for the saturated zone the s
Publicado em: 2010
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4. GRANTS FOR GROUNDWATER MANAGEMENT AT SANTA MARIA RIVER BASIN/RS / SUBSÍDIO PARA GESTÃO DAS ÁGUAS SUBTERRÂNEAS NA BACIA HIDROGRÁFICA DO RIO SANTA MARIA/RS
This study aims to provide subsidies for groundwater management at the basin of Rio Santa Maria-BHRSM. Located in the southwest of Rio Grande do Sul state, Brazil, on the edge of Paraná Basin and transitioning towards the Uruguaio Sul-Riograndense Shield, has an area of 15,797,300 square kilometers. About 16 formations occur in outcrops Pavão (2004), of wh
Publicado em: 2009
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5. Study of flow in vadose zone from electrical resistivity surveys
Entre os métodos indiretos aplicados ao monitoramento ambiental, a eletrorresistividade tem desempenhado um papel importante no entendimento do fluxo de água na zona não saturada dos solos e, conseqüentemente, na recarga dos aqüíferos. Neste trabalho, pretende-se avaliar a influência de algumas propriedades pedo-geomorfológicas na infiltração e per
Revista Brasileira de Geofísica. Publicado em: 2008-06
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6. FLUX AND TRANSPORT STUDY OF PURE GASOLINE AND GASOLINE BLENDED ETHANOL IN UNSATURATED POROUS MEDIA / ESTUDO DO FLUXO E TRANSPORTE DE GASOLINA PURA E MISTURADA COM ETANOL EM MEIOS POROSOS NÃO SATURADOS
The subsurface release of water immiscible pollutants (NAPLs) due to leaks in storage tanks or pipelines and spilling transportation accidents is of great concern, since the NAPL or its constituents may migrate through the vadose zone until reaching the water table and eventually contaminate clean water sources. In Brazil, most of the gas stations store etha
Publicado em: 2007
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7. Biodegradation of organic compounds in vadose zone and aquifer sediments.
The microbial processes that occur in the subsurface under a typical Midwest agricultural soil were studied. A 26-m bore was installed in November of 1988 at a site of the Purdue University Agronomy Research Center. Aseptic collections of soil materials were made at 17 different depths. Physical analysis indicated that the site contained up to 14 different s
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8. Spatial and Resource Factors Influencing High Microbial Diversity in Soil
To begin defining the key determinants that drive microbial community structure in soil, we examined 29 soil samples from four geographically distinct locations taken from the surface, vadose zone, and saturated subsurface using a small-subunit rRNA-based cloning approach. While microbial communities in low-carbon, saturated, subsurface soils showed dominanc
American Society for Microbiology.
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9. Remobilization of toxic heavy metals adsorbed to bacterial wall-clay composites.
Significant quantities of Ag(I), Cu(II), and Cr(III) were bound to isolated Bacillus subtilis 168 walls, Escherichia coli K-12 envelopes, kaolinite and smectite clays, and the corresponding organic material-clay aggregates (1:1, wt/wt). These sorbed metals were leached with HNO3, Ca(NO3)2, EDTA, fulvic acid, and lysozyme at several concentrations over 48 h a