Laboratory Measurements of the Unsaturated Hydraulic Properties at the Vadose Zone Transport Field Study Site PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Laboratory Measurements of the Unsaturated Hydraulic Properties at the Vadose Zone Transport Field Study Site PDF full book. Access full book title Laboratory Measurements of the Unsaturated Hydraulic Properties at the Vadose Zone Transport Field Study Site by . Download full books in PDF and EPUB format.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Get Book Here
Book Description
This report presents sampling and measurement procedures and measurement results for 60 samples from the S-1, S-2, and S-3 bore holes at the Vadose Zone Transport Field Study Leak Simulation Test Site, located at the Sisson and Lu (1984) injection site in the 200 East Area of the Hanford Site. Measured data include particle size distributions (19 points), bulk densities (and bulk density-derived porosity), water retention characteristics (16 static points), and saturated and unsaturated hydraulic conductivities. The coring and sub-sampling procedures led to partially, and occasionally completely, disturbed samples. Textural analyses showed that most of the samples could be classified as sand, some as loamy sands, and two as sandy loams. The multi-step outflow method failed for seven samples, yielding 53 samples for which hydraulic parameters were available. Van Genuchten and Brooks-Corey water retention parameters were determined using static retention points (derived from multi-step outflow time series). Inverse analyses of the multi-step outflow data yielded additional unsaturated hydraulic conductivity parameters. Unfortunately, the inverse analyses had some problems in reaching stable solutions. Therefore, we sometimes fixed saturated and residual water contents and saturated hydraulic conductivities at initial values. Even then, it was not possible to reach a solution for two samples leaving the total number of samples for which inverse solutions were available at 51. We also noticed that Brooks-Corey inversions were of lesser quality than van Genuchten inversions. We suggest that Brooks-Corey inversions be treated carefully and that, where possible, the far more reliable direct fits of the Brooks-Corey curve to the static retention data be used. The data gathered in this effort are for the most part reported in the appendix. Raw, outflow time series data from the multi-step outflow procedure are not included. An electronic version of the data is available from the first and third authors.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
Get Book Here
Book Description
This report presents sampling and measurement procedures and measurement results for 60 samples from the S-1, S-2, and S-3 bore holes at the Vadose Zone Transport Field Study Leak Simulation Test Site, located at the Sisson and Lu (1984) injection site in the 200 East Area of the Hanford Site. Measured data include particle size distributions (19 points), bulk densities (and bulk density-derived porosity), water retention characteristics (16 static points), and saturated and unsaturated hydraulic conductivities. The coring and sub-sampling procedures led to partially, and occasionally completely, disturbed samples. Textural analyses showed that most of the samples could be classified as sand, some as loamy sands, and two as sandy loams. The multi-step outflow method failed for seven samples, yielding 53 samples for which hydraulic parameters were available. Van Genuchten and Brooks-Corey water retention parameters were determined using static retention points (derived from multi-step outflow time series). Inverse analyses of the multi-step outflow data yielded additional unsaturated hydraulic conductivity parameters. Unfortunately, the inverse analyses had some problems in reaching stable solutions. Therefore, we sometimes fixed saturated and residual water contents and saturated hydraulic conductivities at initial values. Even then, it was not possible to reach a solution for two samples leaving the total number of samples for which inverse solutions were available at 51. We also noticed that Brooks-Corey inversions were of lesser quality than van Genuchten inversions. We suggest that Brooks-Corey inversions be treated carefully and that, where possible, the far more reliable direct fits of the Brooks-Corey curve to the static retention data be used. The data gathered in this effort are for the most part reported in the appendix. Raw, outflow time series data from the multi-step outflow procedure are not included. An electronic version of the data is available from the first and third authors.
Author: Daniel B. Stephens
Publisher: CRC Press
ISBN: 1351405802
Category : Science
Languages : en
Pages : 347
Get Book Here
Book Description
Vadose Zone Hydrology describes the elements of the physical processes most often encountered by hydrogeologists and ground-water engineers in their vadose zone projects. It illustrates the application of soil physics to practical problems relevant to the characterization and monitoring of the vadose zone. It includes an introduction to physical processes, including basic flow theory, and provides examples of important field-scale processes that must be recognizable by hydrogeologists. Considerable attention is given to the concepts of recharge, including how it is most accurately evaluated in the vadose zone. Field and laboratory methods for characterizing hydraulic properties in the vadose zone are also covered, and case studies illustrating these methods are provided. New and emerging technologies for monitoring the vadose zone, particularly for the purpose of detecting contaminants, are highlighted. In the last section of the book, additional case studies are presented, demonstrating applications related to seepage detection, landfill monitoring, and soil gas investigations. This book is written from the perspective of hydrogeologists and is designed to be directly applicable and to maintain continuity and consistency between chapters. It will be an invaluable primer for environmental or geotechnical consultants, regulators, or students who have no prior formal academic training in unsaturated flow concepts. Because the text contains some of the latest advances in this field, it will be an excellent reference for geologists and engineers currently working on problems of vadose zone hydrology.
Author: Allen Hunt
Publisher: Springer Science & Business Media
ISBN: 3540897895
Category : Science
Languages : en
Pages : 334
Get Book Here
Book Description
Why would we wish to start a 2nd edition of “Percolation theory for ?ow in porous media” only two years after the ?rst one was ?nished? There are essentially three reasons: 1) Reviews in the soil physics community have pointed out that the introductory material on percolation theory could have been more accessible. Our additional experience in teaching this material led us to believe that we could improve this aspect of the book. In the context of rewriting the ?rst chapter, however, we also expanded the discussion of Bethe lattices and their relevance for “classical” - ponents of percolation theory, thus giving more of a basis for the discussion of the relevance of hyperscaling. This addition, though it will not tend to make the book more accessible to hydrologists, was useful in making it a more complete reference, and these sections have been marked as being possible to omit in a ?rst reading. It also forced a division of the ?rst chapter into two. We hope that physicists without a background in percolation theory will now also ?nd the - troductory material somewhat more satisfactory. 2) We have done considerable further work on problems of electrical conductivity, thermal conductivity, and electromechanical coupling.
Author: S. S. Sumioka
Publisher:
ISBN:
Category : Earth sciences
Languages : en
Pages : 60
Get Book Here
Book Description
Author: John S. Selker
Publisher: CRC Press
ISBN: 9780873719537
Category : Technology & Engineering
Languages : en
Pages : 356
Get Book Here
Book Description
Vadose Zone Processes provides a unified, up-to-date treatment on the movement of water through unsaturated media. In addition to covering the basic equations governing the flow and fate of water in unsaturated media, the text covers the biogeochemistry of vadose environments and the statistical description of vadose processes. The authors emphasize maintaining an intuitive understanding of how the results are derived and how they are appropriately applied. This comprehensive and important book will be useful not only to those in traditional fields such as civil engineering, geology, crop science, chemical engineering, agricultural engineering, and hydrology but also in the newer environmental engineering fields including containment transport, pollution remediation, and waste disposal.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309170990
Category : Science
Languages : en
Pages : 398
Get Book Here
Book Description
Fluid flow and solute transport within the vadose zone, the unsaturated zone between the land surface and the water table, can be the cause of expanded plumes arising from localized contaminant sources. An understanding of vadose zone processes is, therefore, an essential prerequisite for cost-effective contaminant remediation efforts. In addition, because such features are potential avenues for rapid transport of chemicals from contamination sources to the water table, the presence of fractures and other channel-like openings in the vadose zone poses a particularly significant problem, Conceptual Models of Flow and Transport in the Fractured Vadose Zone is based on the work of a panel established under the auspices of the U.S. National Committee for Rock Mechanics. It emphasizes the importance of conceptual models and goes on to review the conceptual model development, testing, and refinement processes. The book examines fluid flow and transport mechanisms, noting the difficulty of modeling solute transport, and identifies geochemical and environmental tracer data as important components of the modeling process. Finally, the book recommends several areas for continued research.
Author: Robert Stephen Bowman
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 150
Get Book Here
Book Description
Author: Lorne Graham Wilson
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 188
Get Book Here
Book Description
Author: Tian-Chyi Yeh
Publisher: Cambridge University Press
ISBN: 1316299643
Category : Science
Languages : en
Pages : 353
Get Book Here
Book Description
This textbook integrates classic principles of flow through porous media with recently developed stochastic analyses to provide new insight on subsurface hydrology. Importantly, each of the authors has extensive experience in both academia and the world of applied groundwater hydrology. The book not only presents theories but also emphasizes their underlying assumptions, limitations, and the potential pitfalls that may occur as a result of blind application of the theories as 'cookie-cutter' solutions. The book has been developed for advanced-level courses on groundwater fluid flow, hydraulics, and hydrogeology, in either civil and environmental engineering or geoscience departments. It is also a valuable reference text for researchers and professionals in civil and environmental engineering, geology, soil science, environmental science, and petroleum and mining engineering.
Author: M. Th Van Genuchten
Publisher:
ISBN:
Category : Porous materials
Languages : en
Pages : 810
Get Book Here
Book Description
