Author: Martin Patrick DerbyPublisher:
ISBN:
Category : Soil permeability
Languages : en
Pages : 110
Book Description
A Comparison of Field and Laboratory Methods for the Determination of Hydraulic Conductivity of the Cohansey Sand Formation in Gloucester County, New Jersey
Author: Martin Patrick DerbyPublisher:
ISBN:
Category : Soil permeability
Languages : en
Pages : 110
Book Description
A Comparison of Laboratory and Field Methods for the Estimation of Hydraulic Conductivity in a Sand and Gravel Aquifer
Author: Linda Peiperl WarrenPublisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 494
Book Description
A Comparison of Field and Laboratory Conductivity Measurements on Plainfield Sand
Author: David Bernard LesczynskiPublisher:
ISBN:
Category : Soil absorption and adsorption
Languages : en
Pages : 110
Book Description
A Comparison of Field and Laboratory Measurements of Hydraulic Conductivity
Author: A. GuerraPublisher:
ISBN:
Category : Field experiments
Languages : en
Pages : 16
Book Description
The hydraulic conductivity of a soil was measured in the laboratory and in the field. Although each technique used yielded consistent results, the hydraulic conductivity obtained differed over several orders of magnitude. These differences in hydraulic conductivity can only be attributed to macroscopic features that weigh differently depending on the mass of soil affected by the different tests.
Techniques to Determine Spatial Variations in Hydraulic Conductivity of Sand and Gravel
Author: Kathryn M. HessPublisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 40
Book Description
The Variability and Estimation of Hydraulic Conductivity in C Horizons of Sandy Loam, Glacial Till Soils ; Comparison of One-step Outflow Laboratory Method to an I̲n̲ S̲i̲t̲u̲ Method for Measuring Hydraulic Conductivity
Author: Dan B. JaynesPublisher:
ISBN:
Category : Soil permeability
Languages : en
Pages : 236
Book Description
Comparison of Four Laboratory and Field Methods for Determining Saturated Hydraulic Conductivity in the Unsaturated Zone
Author: Dana Candice RogersonPublisher:
ISBN:
Category : Groundwater flow
Languages : en
Pages : 132
Book Description
Determination of Hydraulic Conductivity from Grain Size Analysis
Author: Michael KasenowPublisher: Water Resources Publication
ISBN: 9781887201315
Category : Hydrodynamics
Languages : en
Pages : 110
Book Description
Comparison Between Various Field and Laboratory Measurements of the Hydraulic Conductivity of Three Clay Liners
Author: G. DidierPublisher:
ISBN:
Category : Borehole
Languages : en
Pages : 22
Book Description
For waste facilities, field assessment of the hydraulic conductivity of fine- grained soils has been a real challenge for the past decades that has led to several types of test methods. Although standards (ASTM, NF, etc.) have been adopted in many countries, any test method needs careful application for constructing quality-control programs. The type of apparatus, its geometry, and even specimen preparation may be major sources of discrepancy. We compared hydraulic-conductivity values obtained from various field-testing methods (open, sealed, single and double infiltrometers, and borehole methods), and laboratory-testing methods such as oedometer cells or rigid and flexible-wall permeameters. Three materials were tested in this study: a compacted sandbentonite mixture, compacted clayey silt, and natural sandy clay. The field tests were run on soil-test pads whose characteristics were defined beforehand in the laboratory and the field. Comparison of the results shows a large range of hydraulic-conductivity values for a single soil sample. Such variability can commonly be explained by a scale effect, as demonstrated by the use of various types of diameter or geometry for the field or laboratory tests. Soil behavior (swelling or shrinkage) and test-analysis methods (saturated or unsaturated-flow analysis) are other important parameters. In conclusion, we identified the main problems affecting tests with infiltrometers and permeameters, and how they can be reduced or avoided by the improvement of current techniques.
Author: Jay Dunton Dorsey