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Showing 1 to 20 of 286 for “"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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Hydraulic Conductivity of GCLs Permeated With Inorganic Chemical Solutions
… of chemical solutions and effective stress on hydraulic properties. In solutions with low cation concentration, the free swell index exhibits an increasing trend with increasing concentration before the diffused double layer fully collapsed at higher concentration. Decrease of void ratio, …
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Soil-Bentonite Cutoff Walls: Hydraulic Conductivity and Contaminant Transport
… the effectiveness of a cutoff wall is its hydraulic conductivity. There are important difficulties and uncertainties regarding the accuracy of commonly used methods of measuring the hydraulic conductivity of cutoff walls. When predicting contaminant transport through cutoff walls, common …
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Variability of hydraulic conductivity and sorption in a heterogeneous aquifer
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1994.
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Bayesian model averaging on hydraulic conductivity estimation and groundwater head prediction
… parameterization (GP) methods to identify hydraulic conductivity and along with multiple simulation models to predict groundwater head and quantify the prediction uncertainty. Two major issues about BMA are discussed. The first problem is with using Occam’s window in usual BMA applications. …
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Simultaneous measurement of compressibility and hydraulic conductivity using volume controlled methods
Includes bibliographical references.
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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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Selected factors affecting measurement of the hydraulic conductivity of geosynthetic clay liners
… are thin (~7 to 10 mm), factory manufactured hydraulic barriers typically comprising a layer of sodium bentonite sandwiched between two geotextiles. Upon hydration and permeation with water at low effective stress (σ´) (e.g., typically ≤ ~30 kPa [4 psi]), the bentonite in GCLs, which typically …
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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 describing …
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Analysis of Slug Tests to Determine Hydraulic Conductivity of Vertical Cutoff Walls
… is to develop two new methods to evaluate hydraulic conductivity in a cutoff wall considering the compressibility of the backfill material and the proximity of the wall boundaries to the well. One of the new methods involves a series of type curves that takes into account the …
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An Experimental Study on Soil Water Characteristics and Hydraulic Conductivity of Compacted Soils
… Soil water characteristic curve (SWCC) and hydraulic conductivity function (HCF) are vital soil properties that govern engineering behavior of unsaturated soils. In this study, a transient water release and imbibitions method (TRIM) is used to measure the SWCC and HCF under drying and …
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Spatial and temporal variability of the soil saturated hydraulic conductivity in gradients of disturbance
… 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 hydraulic …
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Temporal and spatial variations of hydraulic conductivity in a stream bed in Golden, Colorado
Includes bibliographical references.
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An Evaluation of Borehole Hydraulic Conductivity Equations and Field Determined Soil Water Characteristic Curves
<p>The methods utilized to determine the hydraulic conductivity of compacted clay liners (CCLs) are of importance for safe guarding the environment from landfill leachate. Therefore, the methods utilized in the analysis of the Two Stage Borehole (TSB) test, as described in the ASTM D6391-11 (Method …
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Hydraulic conductivity and chemical compatibility of some Victorian soils used as liners for waste containment
… to chemical leaching. It follows that the design hydraulic conductivity of the clay is a governing parameter and many environmental regulations require this parameter to be less than 1x10"' m/s. Therefore, the precise assessment of hydraulic conductivity and the compatibility of the liner material …
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The Hydraulic Conductivity-Water Content Relationship During Non-Steady Flow in a Vertical Sand Column
Made available in DSpace on 2014-12-10T17:12:43Z (GMT). No. of bitstreams: 1 6915370.pdf: 2059894 bytes, checksum: 3f850432dcf470e297232ab6445d54fa (MD5) Previous issue date: 1969
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The Effects Of Waste Leachates On The Hydraulic Conductivity Of Natural Clays (volumes I And Ii)
… or compacted clay borrow. The liner acts as a hydraulic barrier to control the flux of contaminants from the waste into the adjacent groundwater. In order to do this clay liners are required to have low hydraulic conductivity, k (typically 10{dollar}sp{lcub}-8{rcub}{dollar} cm/s) that shall not …
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Factors Affecting Hydraulic Conductivity of High pH, High Silica Groundwater at the Former Occidental Chemical Corporation Facility
… and column tests to identify factors that affect hydraulic conductivity of OCC site soil in response to high pH groundwater. High pH groundwater at the OCC site has elevated concentrations of Si and Al. These constituents dissolved from OCC site soil historically, though whether dissolution is …
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Effects of structural iron oxidation state on the hydraulic conductivity and potassium fixation of smectite clays and soils
Restricted to the U of I community indefinitely during batch ingest of legacy ETDs
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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
… 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 lateral flow …
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