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Showing 1 to 20 of 51 for “"saturated hydraulic conductivity"”.
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Estimating scale dependence of saturated hydraulic conductivity in soils
Understanding the effect of scale on hydraulic and physical properties of soils has broad applications to scaling problems in hydrogeology, soil physics, and environmental engineering. The scale dependence of flow and transport is attributed to spatial heterogeneities, such as pore-size …
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Rapid Measurement and Estimation of Saturated Hydraulic Conductivity of Mineral Slurries
… tailings management and reclamation plans. The hydraulic conductivity-void ratio relationship primarily influences this behaviour, dominating the long-term performance of fine-grained slurries with higher initial water contents. However, the determination of this function can be very challenging …
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Laboratory investigation of a method for determining in situ saturated hydraulic conductivity
… of a method for determining in situ saturated hydraulic conductivity in porous media. This method requires an accurate measurement of the horizontal port water speed through a section of a borehole packed with a porous material of known hydraulic conductivity. Analytical expressions …
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Spatial and temporal variability of the soil saturated hydraulic conductivity in gradients of disturbance
… key parameter of the hydrologic cycle, the soil saturated hydraulic conductivity (synonym: permeability; Ks from here on), because it is a sensitive indicator for soil disturbances. My general objective was to quantify the effects of the regional natural and human disturbances on the saturated …
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Saturated hydraulic conductivity in the humid tropics : sources of variability, implications for monitoring and effects on near-surface hydrological flow paths
… properties sensitive to land-use change is the saturated hydraulic conductivity (Ks) as it governs vertical percolation of water within the soil profile. Low values of Ks in a certain soil depth can form an impeding layer and lead to perched water tables and the development of predominantly …
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Determining the Mobility of Metals Through Coal Combustion Byproducts in Surface Impoundments by Analyzing Leachate From Modified Saturated Hydraulic Conductivity Tests
… a open column percolation test to determine the hydraulic conductivity of the ash, a set of tests were run to see what metals were contained within the test leachate using permitted discharge from the generating facility (Georgia Power Company's (GPC) Plant McDonough, Smyrna, Georgia). The …
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Impacts of timber harvesting on soil physical properties in wetlands
… (macro-, micro-, total), water table levels, and saturated hydraulic conductivity within the compacted areas. However, the depth to reducing conditions was not significantly different from between undisturbed and disturbed areas of compacted sites. Puddling increased in bulk density and a decrease …
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Range of and relationships between physical and hydraulic properties of commonly available denitrifying bioreactor woodchips
Saturated hydraulic conductivity (Ksat), porosity, and particle size are key physical parameters of woodchip media for denitrifying bioreactor design. Current design guidelines can be improved by analyzing more woodchip types and the effects of overburden on woodchip properties. The objectives of …
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Water flow paths in soils of an undisturbed and landslide affected mature montane rainforest in South Ecuador
… relationship between rock fragment content and saturated hydraulic conductivity of the soil, present study aims particularly to investigate flow paths of water in soils of landslide affected and unaffected hillslopes. Therefore, we employed conventional field- and laboratory methods, dye tracer …
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Preferential flow in vertically oriented, unsaturated soil layers
… flow and the flow of water through unsaturated soils. Unfortunately, the research has been completed by different disciplines of science and engineering, resulting in a wide range of terminology and research objectives. A field program conducted during the excavation of a large waste …
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Reclamation of fine-textured sodic soil using gypsum, langbeinite, and calcium chloride
… CaCl₂ (anhydrous) on exchangeable Na removal and saturated hydraulic conductivity of a sodic soil were investigated under laboratory batch studies and laboratory column leaching studies. The research involved four phases of studies. Characterization of the soil and irrigation water indicated that …
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Impacts of biota on bioretention cell function during establishment in the Midwest
… Kansas grasses impact runoff treatment and hydraulic function of a bioretention cell. This study also employed the Comprehensive Bioretention Cell (BRC) model to demonstrate how three seasons of growth could impact bioretention cell function. The model results of the first season of growth …
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Quantification of wildfire-induced perturbations to soil-water retention curves and their impact on rainfall runoff
… shown significant post-fire perturbations to saturated hydraulic conductivity (Ks) and sorptivity, and in some cases these perturbations appear to exert a strong control on the observed increase in post-fire runoff and debris flow. However, a variety of other soil properties also influence …
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Quality Soil Management in Illinois Using Winter Cover Crops
… distribution, water retention properties, and saturated hydraulic conductivity (K sat). Compared to winter fallow, crop sequences that included WCC provided substantial benefits from the soil productivity standpoint. In particular, the inclusion of the biculture of vetch + rye as WCC in no-till …
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Evaluating Conservation Agricultural Management for Soil Health Outcomes in Southeastern Virginia
… layer), total organic carbon, carbon stocks, saturated hydraulic conductivity, and yield were measured repeatedly over a seven-year period to better understand the longitudinal response of these properties to management. Bulk density and saturated hydraulic conductivity showed a greater …
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Hyporheic flow in a mountainous riverine system
… hyporheic fluxes, due to a layer with low saturated hydraulic conductivity (K ~ 10ˉ⁷ – 10ˉ⁹ m/s) just below the streambed throughout most of the study reach. The lateral flow around the north dam (> 0.6 m high) resulted in fluxes that ranged from 0.002 to 0.015 L/s in the near bank …
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Comparison of two hydrological models on a Virginia Piedmont watershed
… very sensitive to changes in rainfall amount, saturated hydraulic conductivity and effective capillary drive. For PSRM-QUAL, peak discharge rate and total runoff volume were very sensitive to changes in SCS CN, initial abstraction coefficient and rainfall amount.
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Characterizing and modeling the hydrologic properties of coal combustion by-products in landfills
… investigation focused on determination of the saturated and unsaturated hydraulic properties of fly ash and bottom ash to then be used in order to develop a 1-dimensional unsaturated flow model. Ash samples from a power plant as well as core samples from buried CCB pits were collected for …
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Modelling and Monitoring of Phosphorus Transport and Speciation in Soil
… The model successfully predicts trends in saturated hydraulic conductivity. The effect of the assumptions used in the Pore-Cor geometry have been investigated by comparing of two dimensional slices of the simulated networks with two dimensional image analysis data. The geometric limitations …
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An Experimental Study on Soil Water Characteristics and Hydraulic Conductivity of Compacted Soils
The importance of applying unsaturated soil mechanics concepts to geotechnical engineering design has been widely recognized. Soil water characteristic curve (SWCC) and hydraulic conductivity function (HCF) are vital soil properties that govern engineering behavior of unsaturated soils. In this …
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