Unsaturated Zone Modeling

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Unsaturated-zone Modeling

R.A. Feddes,G.H.de Rooij,J.C. van Dam
Unsaturated zone Modeling Book PDF

Author : R.A. Feddes,G.H.de Rooij,J.C. van Dam
Publisher : Springer Science & Business Media
Page : 392 pages
File Size : 54,8 Mb
Release : 2004-10-11
Category : Science
ISBN : 1402029187

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Unsaturated-zone Modeling by R.A. Feddes,G.H.de Rooij,J.C. van Dam Pdf

Mankind has manipulated the quantity and quality of soil water for millennia. Food production was massively increased through fertilization, irrigation and drainage. But malpractice also caused degradation of immense areas of once fertile land, rendering it totally unproductive for many generations. In populated areas, the pollutant load ever more often exceeds the soil’s capacity for buffering and retention, and large volumes of potable groundwater have been polluted or are threatened to be polluted in the foreseeable future. In the past decades, the role of soil water in climate patterns has been recognized but not yet fully understood. The soil-science community responded to this diversity of issues by developing numerical models to simulate the behavior of water and solutes in soils. These models helped improve our understanding of unsaturated-zone processes and develop sustainable land-management practices. Aimed at professional soil scientists, soil-water modelers, irrigation engineers etc., this book discusses our progress in soil-water modeling. Top scientists present case studies, overviews and analyses of strengths, weaknesses, opportunities and threats related to soil-water modeling. The contributions cover a wide range of spatial scales, and discuss fundamental aspects of unsaturated-zone modeling as well as issues related to the application of models to real-world problems.

Conceptual Models of Flow and Transport in the Fractured Vadose Zone

National Research Council,Commission on Geosciences, Environment, and Resources,Board on Earth Sciences and Resources,U.S. National Committee for Rock Mechanics,Panel on Conceptual Models of Flow and Transport in the Fractured Vadose Zone
Conceptual Models of Flow and Transport in the Fractured Vadose Zone Book PDF

Author : National Research Council,Commission on Geosciences, Environment, and Resources,Board on Earth Sciences and Resources,U.S. National Committee for Rock Mechanics,Panel on Conceptual Models of Flow and Transport in the Fractured Vadose Zone
Publisher : National Academies Press
Page : 399 pages
File Size : 48,9 Mb
Release : 2001-06-21
Category : Science
ISBN : 9780309073028

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Conceptual Models of Flow and Transport in the Fractured Vadose Zone by National Research Council,Commission on Geosciences, Environment, and Resources,Board on Earth Sciences and Resources,U.S. National Committee for Rock Mechanics,Panel on Conceptual Models of Flow and Transport in the Fractured Vadose Zone Pdf

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.

Unsaturated Zone Hydrology

Gary L. Guymon
Unsaturated Zone Hydrology Book PDF

Author : Gary L. Guymon
Publisher : Pearson Education
Page : 369 pages
File Size : 41,6 Mb
Release : 1994-03-23
Category : Science
ISBN : 9780132441216

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Unsaturated Zone Hydrology by Gary L. Guymon Pdf

Using a quantitative modeling approach, this volume offers a comprehensive exploration of the movement of water in the unsaturated zone (and associated transport phenomena) – the pathway of many contaminants to the saturated zone where much of the world's potable water is stored. It is the first book to combine research and knowledge on this subject from a wide variety of disciplines into a single source directed toward engineering and environmental training and applications. Deals with contaminant and heat transport in the unsaturated zone; includes a description of soils and their properties and unsaturated soil hydraulic properties; describes unsaturated zone processes; and thoroughly explores numerical modeling and uncertainty in modeling. A text for students in engineering and environmental science, and a reference for practicing engineers and scientists involved in the analysis of unsaturated zone contaminant problems.

Unsaturated Zone Hydrology for Scientists and Engineers

James A. Tindall,James R. Kunkel,Dean E. Anderson
Unsaturated Zone Hydrology for Scientists and Engineers Book PDF

Author : James A. Tindall,James R. Kunkel,Dean E. Anderson
Publisher : Unknown
Page : 648 pages
File Size : 55,5 Mb
Release : 1999
Category : Science
ISBN : STANFORD:36105023081149

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Unsaturated Zone Hydrology for Scientists and Engineers by James A. Tindall,James R. Kunkel,Dean E. Anderson Pdf

Introduction and bief history; Physical properties and characteristics of soils; Behavior of clay-water systems; Potential and thermodynamics of soil water; Chemical properties and principles of soil water; Principles of water flow in soil; Saturated water flow in soil; Unsaturated water flow in soil; Transport of heat and gas in osil and at the surface; Contaminant transport; Effects of infiltration and drainage on soil-water redistribution; Applied soil physics: modeling water, solute, and vapor movement. Drainage in soil water and ground water; Soil remediation techniques; Saptial variability, scaling, and fractals; Appendix 1: Site characterizaton and monitoring devices; Appendix 2: Mathematics review; Appendix 3: tables; References; Index.

Unsaturated Flow in Hydrologic Modeling

H.J. Morel-Seytoux
Unsaturated Flow in Hydrologic Modeling Book PDF

Author : H.J. Morel-Seytoux
Publisher : Springer Science & Business Media
Page : 534 pages
File Size : 45,6 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400923522

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Unsaturated Flow in Hydrologic Modeling by H.J. Morel-Seytoux Pdf

This volume certainly is a Conference Proceedings, the Proceedings of the NATO Advanced Research Workshop (ARW) on "Unsaturated Flow in Hydrologic Modeling" held at "Les Villages du Soleil" near ArIes, France from June 13 to 17, 1988. Let me therefore acknowledge properly, at the very beginning, the gratitude of all the participants to the NATO Science Committee for its generous support and worthwhile goal of bringing together scientists of many countries to communicate and share their experiences. Particular thanks are extended to the director of the program, Dr. Luis Vega da Cunha for his interest and understanding. On the other hand this volume is also, and probably more so, a Textbook that fills a gap in the field of unsaturated flow. Many treatises on the subject present the theory in its different aspects. Hardly any explain in details how the different pieces can be put together to address realistic problems at the basin scale. The various invited contributions to the ARW were structured in a subject progression much as chapters are organized in a book. The intent of the ARW was to assess the current state of knowledge in "Unsaturated Flow" and its use in "Hydrologic Modeling Practice". In a sense the interest in fundamentals of unsaturated flow in this ARW was not just for the sake of knowledge but also and primarily for the sake of action. Can such fundamental knowledge be utilized for better management of the water resource? was the basic question.

Evaluation of Unsaturated/vadose Zone Models for Superfund Sites

D. L. Nofziger,Jin-Song Chen,Charles Thomas Haan
Evaluation of Unsaturated vadose Zone Models for Superfund Sites Book PDF

Author : D. L. Nofziger,Jin-Song Chen,Charles Thomas Haan
Publisher : Unknown
Page : 200 pages
File Size : 49,8 Mb
Release : 1994
Category : Government publications
ISBN : UCR:31210012661326

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Evaluation of Unsaturated/vadose Zone Models for Superfund Sites by D. L. Nofziger,Jin-Song Chen,Charles Thomas Haan Pdf

Groundwater Flow and Quality Modelling

E. Custodio,A. Gurgui,J.P. Lobo Ferreira
Groundwater Flow and Quality Modelling Book PDF

Author : E. Custodio,A. Gurgui,J.P. Lobo Ferreira
Publisher : Springer Science & Business Media
Page : 876 pages
File Size : 42,9 Mb
Release : 1988-02-29
Category : Science
ISBN : 9027726558

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Groundwater Flow and Quality Modelling by E. Custodio,A. Gurgui,J.P. Lobo Ferreira Pdf

Proceedings of the NATO Advanced Research Workshop on Advances in Analytical and Numerical Groundwater Flow and Quality Modelling, Lisbon, Portugal, June 2-6, 1987

Modelling Water Flow in Unsaturated Porous Media

Adam Szymkiewicz
Modelling Water Flow in Unsaturated Porous Media Book PDF

Author : Adam Szymkiewicz
Publisher : Springer Science & Business Media
Page : 254 pages
File Size : 53,6 Mb
Release : 2012-10-11
Category : Science
ISBN : 9783642235580

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Modelling Water Flow in Unsaturated Porous Media by Adam Szymkiewicz Pdf

The book focuses on two issues related to mathematical and numerical modelling of flow in unsaturated porous media. In the first part numerical solution of the governing equations is discussed, with particular emphasis on the spatial discretization of highly nonlinear permeability coefficient. The second part deals with large scale flow in heterogeneous porous media of binary structure. Upscaled models are developed and it is shown that the presence of material heterogeneities may give rise to additional non-equilibrium terms in the governing equations or to hysteresis in the averaged constitutive relationships.

Modeling Groundwater Flow and Contaminant Transport

Jacob Bear,Alexander H.-D. Cheng
Modeling Groundwater Flow and Contaminant Transport Book PDF

Author : Jacob Bear,Alexander H.-D. Cheng
Publisher : Springer Science & Business Media
Page : 851 pages
File Size : 48,7 Mb
Release : 2010-01-18
Category : Science
ISBN : 9781402066825

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Modeling Groundwater Flow and Contaminant Transport by Jacob Bear,Alexander H.-D. Cheng Pdf

In many parts of the world, groundwater resources are under increasing threat from growing demands, wasteful use, and contamination. To face the challenge, good planning and management practices are needed. A key to the management of groundwater is the ability to model the movement of fluids and contaminants in the subsurface. The purpose of this book is to construct conceptual and mathematical models that can provide the information required for making decisions associated with the management of groundwater resources, and the remediation of contaminated aquifers. The basic approach of this book is to accurately describe the underlying physics of groundwater flow and solute transport in heterogeneous porous media, starting at the microscopic level, and to rigorously derive their mathematical representation at the macroscopic levels. The well-posed, macroscopic mathematical models are formulated for saturated, single phase flow, as well as for unsaturated and multiphase flow, and for the transport of single and multiple chemical species. Numerical models are presented and computer codes are reviewed, as tools for solving the models. The problem of seawater intrusion into coastal aquifers is examined and modeled. The issues of uncertainty in model input data and output are addressed. The book concludes with a chapter on the management of groundwater resources. Although one of the main objectives of this book is to construct mathematical models, the amount of mathematics required is kept minimal.

Assessment of Non-Point Source Pollution in the Vadose Zone

Dennis L. Corwin,Keith Loague,Timothy R. Ellsworth
Assessment of Non Point Source Pollution in the Vadose Zone Book PDF

Author : Dennis L. Corwin,Keith Loague,Timothy R. Ellsworth
Publisher : American Geophysical Union
Page : 369 pages
File Size : 54,6 Mb
Release : 1999-01-26
Category : Science
ISBN : 9780875900919

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Assessment of Non-Point Source Pollution in the Vadose Zone by Dennis L. Corwin,Keith Loague,Timothy R. Ellsworth Pdf

Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 108. Non-point source (NPS) pollution in the vadose zone (simply defined as the layer of soil extending from the soil surface to the groundwater table) is a global environmental problem. Characteristically, NPS pollutants are widespread and occasionally ubiquitous in extent, thus making remediation efforts difficult and complex; have the potential for maintaining a relatively long active presence in the global ecosystem; and may result in long?]term, chronic health effects in humans and other life forms. Similar to other global environmental issues, the knowledge and information required to address the problem of NPS pollutants in the vadose zone cross several technological and subdisciplinary lines: spatial statistics, geographic information systems (GIS), hydrology, soil science, and remote sensing. Cooperation between disciplines and scientific societies is essential to address the problem. Evidence of such cooperation was the jointly sponsored American Geophysical Union Chapman/Soil Science Society of America (SSSA) Outreach Conference that occurred in October 1997, entitled “Applications of GIS, Remote Sensing, Geostatistics, and Solute Transport Modeling to the Assessment of Non-Point Source Pollution in the Vadose Zone.” The objective of the conference and this book, which was developed from the conference, was to explore current multidisciplinary research for assessing NPS pollution in soil and groundwater resources.