Download or read book Hydraulic Conductivity and Waste Contaminant Transport in Soil written by David Edwin Daniel and published by ASTM International. This book was released on 1994 with total page 617 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lessons Learned from the Application of Standard Test Methods for Field and Laboratory Hydraulic Conductivity Measurement written by RJ. Dunn and published by . This book was released on 1994 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Standard ASTM test methods are now available for laboratory and field measurements of hydraulic conductivity of compacted clay soils which are used in liners and covers at waste facilities. They are widely used in waste facility design and construction quality assurance. Many of these methods require input of qualified professionals to select appropriate test parameters. Unless the parameters are carefully selected, conflict may arise over the suitability of test results and thus the regulatory acceptance of a liner or cover. Four case histories are presented which illustrate the use of both laboratory and field test methods and some of the variations which may result. These variations can usually be explained in terms of test parameters, but they emphasize the importance of suitable engineering judgement for careful selection of test conditions, and data reduction methods which are appropriate for to site conditions and allow for comparison of test results from various tests.
Download or read book Evaluation and Remediation of Low Permeability and Dual Porosity Environments written by Martin N. Sara and published by ASTM International. This book was released on 2002 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Constructing and Controlling Compaction of Earth Fills written by Donald W. Shanklin and published by ASTM International. This book was released on 2000 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation Presents 22 papers, from the July 1999 symposium, written on the use of various standardized methods for specifying and controlling the compaction of soil for engineered constructed earth fills. Perspectives include the historical background, current state-of-the- art practices, case histories of challenging situations, concerns regarding appropriate design parameters for compaction control, and new methods to evaluate soil compaction and related qualities. Annotation copyrighted by Book News, Inc., Portland, OR.
Download or read book Unsaturated Soils Volume 3 written by J.F.T Juca and published by CRC Press. This book was released on 2021-05-31 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unsaturated materials comprise residua, collapsible and expansive naturally occurring soils, compacted soils and, more recently, residues of solid wastes. The engineering problems associated with unsaturated materials range from those related to conventional geotechnical works (e.g. foundations, pavements, slopes and excavations, retaining structures, earthdams, irrigation canals, tunnelling, compacted embankments) to those included in the environmental area (e.g. natural slope instability, erosion and subsidence processes, tailings, residues or solid waste disposal, contaminant transport, remediation of contaminant sites, engineered barriers for environmental protection, re-use of residues). This book, published in three separate volumes, comprises a selection of selected and invited papers presented at the Third International Conference on Unsaturated Soils – UNSAT ‘2002 – that took place in Recife, Brazil, form 10th to 13th March 2002. The book is of interest to consultants, researchers, practitioners, lecturers and students with a background in geotechnical engineering, environmental engineering and engineering geology.
Download or read book Proceedings of the Annual Symposium on Engineering Geology Geotechnical Engineering written by and published by . This book was released on 2001 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Geotechnical Engineering written by and published by . This book was released on 1995 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparison Between Various Field and Laboratory Measurements of the Hydraulic Conductivity of Three Clay Liners written by G. Didier and published by . This book was released on 2002 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Field and Laboratory Measurements of the Hydraulic Conductivity of Compacted Mine Waste Rock written by Todd H. Hill and published by . This book was released on 1998 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Unsaturated Geotechnics written by Charles D. Shackelford and published by . This book was released on 2000 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: GSP 99 contains 38 papers presented at sessions at Geo-Denver 2000, held in Denver, Colorado, August 5-8, 2000.
Download or read book State of the art Field Hydraulic Conductivity Testing of Compacted Soils written by Joseph O. Sai and published by . This book was released on 1991 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydraulic Conductivity written by Lakshmanan Elango and published by BoD – Books on Demand. This book was released on 2011-11-23 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are several books on broad aspects of hydrogeology, groundwater hydrology and geohydrology, which do not discuss in detail on the intrigues of hydraulic conductivity elaborately. However, this book on Hydraulic Conductivity presents comprehensive reviews of new measurements and numerical techniques for estimating hydraulic conductivity. This is achieved by the chapters written by various experts in this field of research into a number of clustered themes covering different aspects of hydraulic conductivity. The sections in the book are: Hydraulic conductivity and its importance, Hydraulic conductivity and plant systems, Determination by mathematical and laboratory methods, Determination by field techniques and Modelling and hydraulic conductivity. Each of these sections of the book includes chapters highlighting the salient aspects and most of these chapters explain the facts with the help of some case studies. Thus this book has a good mix of chapters dealing with various and vital aspects of hydraulic conductivity from various authors of different countries.
Download or read book Standard Test Method for Field Measurement of Hydraulic Conductivity Using Borehole Infiltration written by and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relationship of Laboratory and Field determined Hydraulic Conductivity in Compacted Clay Layer written by A. S. Rogowski and published by . This book was released on 1990 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Comparison Between Field and Laboratory Measurements of Hydraulic Conductivity in a Varved Clay written by DJ. DeGroot and published by . This book was released on 1994 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The measurement of hydraulic conductivity using a variety of field and laboratory techniques was evaluated at a site consisting of medium stiff and soft lacustrine varved clay in western Massachusetts. Field measurements were obtained by conducting "slug" tests in both predrilled and push-in piezometers and also from pore pressure dissipation tests using the piezocone and flat dilatometer. Laboratory hydraulic conductivity values were obtained for both vertical and horizontal flow conditions using a flexible wall permeameter and by indirect estimation from 1-dimensional consolidation tests. Based on a comparison of tests conducted throughout the profile, laboratory flexible wall tests with vertical flow gave the lowest values of hydraulic conductivity whereas the predrilled piezometers yielded the highest values. Of all the field techniques, the push-in piezometers gave the lowest values. Hydraulic conductivity values interpreted from piezocone and flat dilatometer dissipation tests tended to be between those obtained from the predrilled and push-in piezometers. Results from tests in predrilled piezometers show that the hydraulic conductivity increases with increasing screen length, showing the influence of scale effects. The results of this study clearly show that estimation of hydraulic conductivity for this soil is highly dependent on scale effects, the test technique used and on the direction of flow (i.e., parallel versus perpendicular to the orientation of the varves).
Download or read book Measurement of Hydraulic Conductivity Distributions written by Fred J. Molz and published by . This book was released on 1990 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the Hydraulic Conductivity of Gravels Using a Laboratory Permeameter and Silty Sands Using Field Testing with Observation Wells written by Aaron Judge and published by . This book was released on 2013 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new laboratory permeameter was developed for measuring the hydraulic conductivity of gravels ranging from 0.1 to 2 m/s. The release of pneumatic pressure applied to the test specimen induces an underdamped oscillatory response of the water level above the permeameter, similar to an underdamped in situ slug test response in monitoring wells. A closed form model was derived to calibrate the hydraulic minor losses in the permeameter and the hydraulic conductivity of the specimen by performing tests without and with a specimen. The majority of each test series performed on individual specimens produced hydraulic conductivity values within 10% of the average, which is very small for such a measurement. Tests were performed using the permeameter on a collection of subrounded and angular gravels prepared to measured grain size distributions and porosities. The surface area was determined by evaluating the shape and angularity using a method developed in this research and these parameters were used with the measured tortuosity and hydraulic conductivity, to back calculate the packing factor of the Kozeny-Carman equation. The results show that the packing factor for the gravels and materials tested is proportional to the tortuosity cubed. These results provide a valuable update to the Kozeny-Carman equation for predicting the hydraulic conductivity of gravels. Field slug interference tests were performed in pairs of monitoring wells installed at the same elevation in a floodplain deposit of silty sand in Dedham MA. Slug tests were performed in one of the wells while the response was monitored simultaneously in both wells. The measured responses were both analyzed by modifying the KGS model of Hyder et al. (1994) to consider the wellbore storage and filter packs effects. This modification was found to produce estimates of hydraulic conductivity based on the slugged well response that compared well with that estimated based on the observation well's response. Calibrated hydraulic conductivities for the pairs of wells tested ranged from 4x10-6 to 1.5x10-5 m/s and specific storage ranged from 2x10-5 to 7x10-4 m-1.
