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Showing 1 to 14 of 14 for “"retention curve"”.
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Sistema de classificação dos solos baseado na estrutura do espaço poroso
… space structure and takes into account the water retention curve. SPSCS was designed according to the textural classification system and it conceives a structural triangle equivalent to the textural triangle. Nine Orders and four Suborders were proposed, resulting in 36 structural Families that …
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Moisture distribution in soil irrigated with a line source subsurface trickle irrigation system
… were conducted to determine the soil moisture retention curve, the hydraulic conductivity, and soil moisture distribution from the line source. This data was used for model verification with the lateral lines buried 13 inches below the soil surface and spaced 36 and 72 inches apart. Simulated …
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Estimating scale dependence of saturated hydraulic conductivity in soils
… the K_sat at the large scale from the soil water retention curve and K_sat measured at the small scale. We find the root mean square log-transformed error (RMSLE) values 0.45, 0.77, 1.9, and 2.05 (cm/day) for sites Jyndevad, Tylstrup, Silstrup, and Estrup, respectively. Results show that the …
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An Evaluation of Borehole Hydraulic Conductivity Equations and Field Determined Soil Water Characteristic Curves
… of field-obtained soil water characteristic curves (SWCCs) and hydraulic conductivity functions (k-functions) for unsaturated soils. For the determination of the SWCCs and k-functions, each test pad was subjected to an infiltration cycle, using either a sealed double ring infiltrometer or a …
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Soil Heterogeneity in Arid Shrublands: Biotic and Abiotic Processes
… parameters associated with the dry-end of the retention curve were well-defined while saturated conductivity and air-entry lost physical meaning or certainty. The coupled use of water content and potential data as minimization criteria through inverse modeling yielded more realistic parameters …
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Étude des recouvrements avec effet de barrière capillaire pour minimiser les infiltrations d'eau dans les sites d'enfouissement de matières résiduelles
… the amount of leachate produced. Given its water retention characteristics, DBP can also help to control biogas emissions. An experimental cell at Saint-Tite-des-Caps landfill, Québec, was designed to be a low permeability cover and to increase the effectiveness of biogas collection. The design …
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Quantification of wildfire-induced perturbations to soil-water retention curves and their impact on rainfall runoff
… rates into unsaturated soils. The soil-water retention curve (SWRC), also called the soil-water characteristic curve, is the relationship between matric suction and soil-water content and determines many critical unsaturated soil properties such as unsaturated hydraulic conductivity. The SWRC …
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Development and Use of Moisture-Suction Relationships for Geosynthetic Clay Liners
… and relative humidity tests, then fitting water retention curves (WRCs) to the data. WRCs were determined for wetting processes and drying processes in terms of gravimetric moisture content and volumetric moisture content.</p> <p>The effects of GCL type, hydration solution, wet-dry cycles, and …
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Measurement of Soil and Water-Quality Parameters to Understand Subsurface Transport Processes
The goal of this dissertation is to contribute toward a better understanding of the flow and transport dynamics in saturated and unsaturated soils. In the first phase of this study, we have focused on understanding the impacts of climate change driven hydrological processes such as excess rainfall …
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Experimental and numerical analysis of behaviour of the myxospermous seeds of Capsella bursa-pastoris (L.) Medik. (shepherd’s purse) in soil
… Thirdly, a comparative analysis of soil water retention, hydraulic conductivity and rheology using clay and sandy-loam soil containing a range of seed mucilage, or myxospermous seed (MS) or demucilaged seeds (DS) was carried out. The applied densities for mucilage were 0.5 and 1 % [w/w] and for …
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Moisture transport and fixation in porous materials at high moisture levels
… storage capacity is represented by water retention curves, in which suction is plotted against moisture content. The pressure plate and pressure membrane technique is often used to measure water retention curves. There are, however, various ways of carrying out such measurements. This …
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Analyse und Konzeption von Messstrategien zur Erfassung der bodenhydraulischen Variabilität
… Innerhalb einer Klasse kann die Variabilität der Retentions- und hydraulischen Leitfähigkeitcharakteristik auf einen freien Parameter (Skalierungsparameter) reduziert werden. Die Analyse der Zusammenhänge zwischen Boden- und Skalierungsparametern führt letztendlich zu den geeigneten Parametern die …
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Networking in a heterogeneous world: Optimization, measurement, and opportunities
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-05-01
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Stanovení hydraulických charakteristik půdy ve vybrané lokalitě
Diplomová práce se zabývá přímým a nepřímým stanovením hydraulických charakteristik půdy, tj. retenční čára a hydraulická vodivost, v lokalitě Bohaté Málkovice. Pro laboratorní stanovení vlhkostní retenční křivky půdy se používá pískový tank a přetlakový přístroj. K nepřímému určení hydraulických …