Download or read book Measurement of Hydraulic Conductivity of Partially Saturated Soils written by DE. Daniel and published by . This book was released on 1981 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increased interest in protection of the environment has led to a need to be able to predict long-term movement of moisture, and contaminants, in the vicinity of shallow land disposal sites for various toxic and radioactive wastes. The advantages of locating potential sites in arid regions has led to a need to develop means for predicting moisture movements in fairly dry, partially saturated soils and for measurements of the hydraulic conductivities of such soils.
Download or read book Evaluation of Hydraulic Conductivity of Non Aqueous Phase Liquids in Partially Saturated Soils written by Chijioke Ekeleme Akamiro and published by . This book was released on 2013 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Field and Laboratory Measurement of the Permeability of Saturated and Partially Saturated Fine grained Soils written by Roy Edwin Olson and published by . This book was released on 1979 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measuring Hydraulic Conductivity for Use in Soil Survey written by Janneke J. Bouma and published by . This book was released on 1982 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measuring Saturated Hydraulic Conductivity of Soils written by American Society of Agricultural Engineers. Drainage Research Committee and published by . This book was released on 1962 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Permeability and Groundwater Contaminant Transport written by and published by ASTM International. This book was released on 1981 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory and Field Testing of Unsaturated Soils written by Alessandro Tarantino and published by Springer Science & Business Media. This book was released on 2008-12-28 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume details recent global advances in laboratory and field testing of unsaturated soils. Coverage includes mechanical, hydraulic, and geo-environmental testing and applications of unsaturated soil monitoring to engineering behavior of geo-structures.
Download or read book Measuring Saturated Hydraulic Conductivity of Soils written by American Society of Agricultural Engineers. Soil and Water Division. DrainageResearch Committee and published by . This book was released on 1962 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Unsaturated Soils Volume 3 written by J.F.T Juca and published by CRC Press. This book was released on 2021-05-30 with total page 328 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 Measuring Hydraulic Conductivity of Variably Saturated Soils at the Hectometer Scale Using Cosmic Ray Neutrons written by Adam Michael Karczynski and published by . This book was released on 2014 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydraulic conductivity of variably-saturated soils is critical to understanding processes at the land surface. Yet measuring it over an area comparable to the resolution of land-surface models is fraught because of its strong spatial and temporal variations, which render point measurements nearly useless. We derived unsaturated hydraulic conductivity at the horizontal scale of hectometers and the vertical scale of decimeters by analyzing trends in soil moisture measured using the cosmic-ray neutron method. The resulting effective hydraulic conductivity remains close to its value at saturation over approximately half of the saturation range and then plummets. It agrees with the aggregate of 36 point measurements near saturation, but becomes progressively higher at lower water contents; the difference is potentially reconcilable by upscaling of point measurements. This study shows the feasibility of the cosmic-ray method, highlights the importance of measurement scale, and provides a route toward better understanding of land-surface processes.
Download or read book Measuring Saturated Hydraulic Conductivity of Soils Classic Reprint written by Society Of Agricultural Engineers and published by Forgotten Books. This book was released on 2018-02-27 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Measuring Saturated Hydraulic Conductivity of Soils Unfortunately, the choice between methods is seldom black or white, and at the present state of technology there still is much disagreement between experts on the relative merits of many of the methods. Hence this compilation is not to be interpreted as a definitive evaluation, or even a tentative standard. Rather, it should be used as an introduction to the methods available and in common use, with some hints as to their pitfalls and limitations. The serious worker can then turn to the literature references for details on that method which most likely will suit sis needs. The project was initiated with G. O. Schwab as chairman. Cor respondence and personal contact with numerous persons, both mem bers and nonmembers of asae, have contributed to the material here presented.2. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Unsaturated Soils Advances in Geo Engineering written by D.G. Toll and published by CRC Press. This book was released on 2008-06-23 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unsaturated Soils: Advances in Geo-Engineering comprises 136 contributions from leading international researchers and practitioners, presented at the First European Conference on Unsaturated Soils (Durham, UK, 2-4 July 2008). The papers report on the latest advances in geo-engineering aspects of unsaturated soils. It is the first collection to focu
Download or read book Four well Method of Measuring Hydraulic Conductivity in Saturated Soils written by Absalom West Snell and published by . This book was released on 1964 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical estimation of hydraulic parameters in partially saturated soils written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Flow analysis in partially saturated soils requires the determination of soil hydraulic properties: its characteristic curve, q(y), and its permeability curve k(y). The instabilization of slopes, often associated with suction variations, and the transport of contaminants, wherethe source of contaminants is often above water leve, are some of the geotechnical problems involving flows in partially saturated media. The main objective of this work is the numerical implementation of a program, based on finite element coding, for the back analysis of flow parameters in partially saturated soils, based on field experiments, capable of providing information on the quality of the estimates obtained. The back analysis method used here allows the simultaneous determination of the characteristic and permeability curves from transient flow data. The program was used to determine flow parameters of a field experiment conducted in Experimental Field II (PUC-Rio). A simpler configuration test is proposed based on theanalysis of the results obtained in this field experiment and on a sensitivity analysis. This test may provide satisfactory results in the determination of hydraulic properties of partially saturated soils.
Download or read book Unsaturated Soils Research Applications written by Adrian R. Russell and published by CRC Press. This book was released on 2020-09-23 with total page 907 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the contributions to the Second European Conference on Unsaturated Soils, E-UNSAT 2012, held in Napoli, Italy, in June 2012, and includes more than one hundred papers, addressing three thematic areas: experimental, modelling, and engineering.
Download or read book Standard Test Methods for Measurement of Hydraulic Conductivity of Unsaturated Soils 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 Hydraulic Functions of Soils from Physical Experiments and Their Applications written by Charles Su and published by . This book was released on 1976 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based upon the Pearson Type VIII distribution function, a general retention function which relates the saturation to the capillary pressure in disturbed soils has been discovered. This simple and yet complete function has been shown to describe precisely the imbibition as well as the drainage branch of the retention curve. It is defined by four readily assessed parameters that either have physical significance themselves or may be used to determine some hydraulic properties of the soil. With the assumption that the Burdine integrals are adequate, a relative permeability function has been derived through the substitution of the retention function for the integrands in the Burdine integrals. The permeability function is expressed in terms of the incomplete Beta function ratio whose value may be conveniently found in some mathematical tables. Further, a general pore-size distribution function of soils has been obtained from the retention function. The derivation of the pore-size distribution function enables more rigorous examination and further exploration of the theories concerning water movement in partially saturated soils. In this respect, an explanation of the phenomenon of air entrapment during imbibition has been offered through an energy concept based upon the pore-size distribution function along with the retention function. Two criteria of affinity have been established for porous media. Media are said to be affine if their corresponding pore-size distribution parameters are identical. The scaling factor for the external dimension of the model has been chosen to be the capillary pressure head at the inflection. point of the retnetion curve, whose value is always finite. The effect of the pore-size distribution parameters upon the retention, permeability and diffusivity curves has been analyzed. The analysis shows the parameter governing the downward concavity of the retention curve is as important as that governing the upward concavity when it comes to computing the permeability values from the retention data. A new and simple apparatus and procedure for obtaining the retention data of soil water in the laboratory have been developed. The technique can expedite the acquisition of the data for either the drainage or the imbibition branch of the retention curve.
