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Book Laboratory and Field Testing of Unsaturated Soils

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.

Book Chambre des pairs impressions diverses session de 1840 Tome 1 n 15

Download or read book Chambre des pairs impressions diverses session de 1840 Tome 1 n 15 written by and published by . This book was released on 1840 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Soil Hydraulic Properties

Download or read book Soil Hydraulic Properties written by Nabil Ibrahim Mina and published by . This book was released on 1994 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unsaturated flow through porous media has gained a lot of attention in recent decades in many fields of agriculture and hydrology. Examples are many, of which are deficit irrigation and contaminants transport. Several models simulating unsaturated flow processes require as input the diffusivity -water content relation (D-0) and/or the hydraulic conductivity-water content relation (K-0). Several techniques for measuring or predicting these relations were developed throughout the literature. Most of these techniques involve either analytical and quasi-analytical solutions of the governing non-linear partial differential equation, or laboratory experiments, which are both expensive and time consuming. In this research, an experimental model was developed based on the field capacity concept and requires only measurements of the wetting depth with time. The laboratory setup is simple and inexpensive, consisting of uniformly packed soil columns. Three replicates of three different soil textures were used. Water was added to the columns and measurements of the wetting depths were taken after infiltration has virtually ceased; these measurements were then used to get the D-0 relation. With the aid of the soil moisture characteristic curves developed by the pressure plate method, the K-0 relation was determined. Results produced by this model showed trends that were in good agreement with some empirical relations in the literature, especially for fine textured soils. The best fitted relations for clay and sandy clay loam soils were of the power function and the exponential function types. For coarse textured soils (sand) the data were scattered and the developed model was not valid, - this was due to neglecting the gravity term in the model. The values of the fitted experimental parameters were too high as compared with those in the literature.

Book The UNSODA Unsaturated Soil Hydraulic Database

Download or read book The UNSODA Unsaturated Soil Hydraulic Database written by and published by . This book was released on 1996 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Unsaturated Soils Two Volume Set

Download or read book Unsaturated Soils Two Volume Set written by Eduardo E. Alonso and published by CRC Press. This book was released on 2010-09-02 with total page 1532 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent decades the development of unsaturated soil mechanics has been remarkable, resulting in momentous advances in fundamental knowledge, testing techniques, computational procedures, prediction methodologies and geotechnical practice. The advances have spanned the full spectrum of theory and practice. In addition, unsaturated materials exhibiting complex behaviour such as residual soils, swelling soils, compacted soils, collapsing soils, tropical soils and solid wastes have been integrated in a common understanding of shared behaviour features. It is also noteworthy that unsaturated soil mechanics has proved surprisingly fruitful in expanding to other neighbouring areas such as swelling rocks, rockfill mechanics, and freezing soils. As a consequence, geotechnical engineering involving unsaturated soils can be now approached from a more rational and systematic perspective leading towards an improved and more effective practice. Unsaturated Soils contains the papers presented at the 5th International Conference on Unsaturated Soil (Barcelona, Spain, 6-8 September 2010). They report significant advances in the areas of unsaturated soil behaviour, testing techniques, constitutive and numerical modelling and applications. The areas of application include soil-atmosphere interaction, foundations, slopes, embankments, pavements, geoenviromental problems and emerging topics. They are complemented by three keynote lectures and three general reports covering general issues of modelling, testing and applications. Unsaturated Soils is a comprehensive record of the state-of-the art in unsaturated soil mechanics and a sound basis for further progress in the future. The two volumes will serve as an essential reference for academics, researchers and practitioners interested in unsaturated soils.

Book Soil Water Solute Process Characterization

Download or read book Soil Water Solute Process Characterization written by Javier Alvarez-Benedi and published by CRC Press. This book was released on 2004-12-28 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt: The practitioner or researcher often faces complex alternatives when selecting a method to characterize properties governing a soil process. After years of research and development, environmental and agricultural professionals now have an array of methods for characterizing soil processes. Well-established methods, however, may not be suitable for

Book An Analytical Method for the Simultaneous Determination of Soil Hydraulic Properties from Multistep Outflow Data

Download or read book An Analytical Method for the Simultaneous Determination of Soil Hydraulic Properties from Multistep Outflow Data written by Rayan Ribal Bsat and published by . This book was released on 2006 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water transport in the vadose zone greatly depends on the hydraulic properties o f soils. The direct determination of those properties in the field or laboratory is tedious, time-consuming, and involves considerable uncertainty for most prac tical applications. Recently, inverse modeling has been introduced to estimate s oil hydraulic properties, using transient flow information of measured time seri es. Inverse methods combine forward soil water flow models with optimization alg orithms to find the best parameter set that minimizes an objective function. Ass uming a linear hydraulic conductivity - moisture content k(theta) relationship a nd an exponential hydraulic conductivity - water pressure k(h) model, the parame ter identification problem is solved with reasonable accuracy and simplicity, th rough the analysis of multistep outflow data. Unsaturated hydraulic properties o f a hypothetical soil are first evaluated by a nonlinear inversion method minimi zing various objective functions, to identify the information content of data re quired for the proper determination of soil hydraulic parameters. Multistep expe riments are then simulated on three soils with different texture characteristics via Hydrus-1D software, to explore the applicability and limitations of applyin g the proposed parameter estimation technique to various soil types. Finally, tr ansient flow data from an actual multistep experiment with inherent measurement errors is used, whereby the proposed optimization method is used along with the Hydrus-1D numerical code to inversely estimate the unsaturated soil hydraulic pr operties. The proposed method does not require a numerical solution of the flow problem, and when tested against numerical and experimental outflow data gives v ery satisfactory results.

Book Laboratory Tests for Unsaturated Soils

Download or read book Laboratory Tests for Unsaturated Soils written by Eng-Choon Leong and published by CRC Press. This book was released on 2023-02-16 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: The testing of unsaturated soils requires greater care and effort than that of saturated soils. Although unsaturated soil mechanics has been embraced by geotechnical engineering, engineering practice has not yet caught up as the characterization of unsaturated soils is difficult and time-consuming, and made harder still by a lack of standards. Laboratory Tests for Unsaturated Soils collates test procedures to cover all laboratory tests for characterising unsaturated soils. It covers the background, theory, test procedures, and interpretation of test results. Each test procedure is broken down into simple stages and described in detail. The pitfalls of each test and the interpretation of the test results are explained. Test data and calculation methods are given, along with many numerical examples to illustrate the methods of interpretation and to offer the presentation of typical results. The book is especially useful for students and researchers who are new to the field and provides a practical handbook for engineering applications.

Book Handbook of Soil Sciences Two Volume Set

Download or read book Handbook of Soil Sciences Two Volume Set written by Pan Ming Huang and published by CRC Press. This book was released on 2018-10-03 with total page 2272 pages. Available in PDF, EPUB and Kindle. Book excerpt: An evolving, living organic/inorganic covering, soil is in dynamic equilibrium with the atmosphere above, the biosphere within, and the geology below. It acts as an anchor for roots, a purveyor of water and nutrients, a residence for a vast community of microorganisms and animals, a sanitizer of the environment, and a source of raw materials for co

Book The Handbook of Groundwater Engineering Third Edition

Download or read book The Handbook of Groundwater Engineering Third Edition written by John H. Cushman and published by CRC Press. This book was released on 2016-11-25 with total page 1726 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition adds several new chapters and is thoroughly updated to include data on new topics such as hydraulic fracturing, CO2 sequestration, sustainable groundwater management, and more. Providing a complete treatment of the theory and practice of groundwater engineering, this new handbook also presents a current and detailed review of how to model the flow of water and the transport of contaminants both in the unsaturated and saturated zones, covers the protection of groundwater, and the remediation of contaminated groundwater.

Book Evaluation of Transient Flow Measurements on Intact Cores as a Means of Approximating the Hydraulic Conductivity of Unsaturated Soil Under Field Conditions

Download or read book Evaluation of Transient Flow Measurements on Intact Cores as a Means of Approximating the Hydraulic Conductivity of Unsaturated Soil Under Field Conditions written by Michael Henry Roulier and published by . This book was released on 1972 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Infiltration Measurements for Soil Hydraulic Characterization

Download or read book Infiltration Measurements for Soil Hydraulic Characterization written by Rafael Angulo-Jaramillo and published by Springer. This book was released on 2016-06-29 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarises the main results of many contributions from researchers worldwide who have used the water infiltration process to characterize soil in the field. Determining soil hydrodynamic properties is essential to interpret and simulate the hydrological processes of economic and environmental interest. This book can be used as a guide to soil hydraulic characterization and in addition it gives a complete description of the treated techniques, including an outline of the most significant research results, with the main points that still needing development and improvement.

Book Unsaturated Soil Mechanics in Engineering Practice

Download or read book Unsaturated Soil Mechanics in Engineering Practice written by Delwyn G. Fredlund and published by John Wiley & Sons. This book was released on 2012-07-30 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive guide to unsaturated soil— from the world's experts on the subject This book builds upon and substantially updates Fredlund and Rahardjo's publication, Soil Mechanics for Unsaturated Soils, the current standard in the field of unsaturated soils. It provides readers with more thorough coverage of the state of the art of unsaturated soil behavior and better reflects the manner in which practical unsaturated soil engineering problems are solved. Retaining the fundamental physics of unsaturated soil behavior presented in the earlier book, this new publication places greater emphasis on the importance of the "soil-water characteristic curve" in solving practical engineering problems, as well as the quantification of thermal and moisture boundary conditions based on the use of weather data. Topics covered include: Theory to Practice of Unsaturated Soil Mechanics Nature and Phase Properties of Unsaturated Soil State Variables for Unsaturated Soils Measurement and Estimation of State Variables Soil-Water Characteristic Curves for Unsaturated Soils Ground Surface Moisture Flux Boundary Conditions Theory of Water Flow through Unsaturated Soils Solving Saturated/Unsaturated Water Flow Problems Air Flow through Unsaturated Soils Heat Flow Analysis for Unsaturated Soils Shear Strength of Unsaturated Soils Shear Strength Applications in Plastic and Limit Equilibrium Stress-Deformation Analysis for Unsaturated Soils Solving Stress-Deformation Problems with Unsaturated Soils Compressibility and Pore Pressure Parameters Consolidation and Swelling Processes in Unsaturated Soils Unsaturated Soil Mechanics in Engineering Practice is essential reading for geotechnical engineers, civil engineers, and undergraduate- and graduate-level civil engineering students with a focus on soil mechanics.