Introduction to Groundwater Modeling

Finite Difference and Finite Element Methods

Author: Herbert F. Wang,Mary P. Anderson

Publisher: Academic Press

ISBN: 0080571948

Category: Technology & Engineering

Page: 237

View: 8176

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The dramatic advances in the efficiency of digital computers during the past decade have provided hydrologists with a powerful tool for numerical modeling of groundwater systems. Introduction to Groundwater Modeling presents a broad, comprehensive overview of the fundamental concepts and applications of computerized groundwater modeling. The book covers both finite difference and finite element methods and includes practical sample programs that demonstrate theoretical points described in the text. Each chapter is followed by problems, notes, and references to additional information. This volume will be indispensable to students in introductory groundwater modeling courses as well as to groundwater professionals wishing to gain a complete introduction to this vital subject. Key Features * Systematic exposition of the basic ideas and results of Hilbert space theory and functional analysis * Great variety of applications that are not available in comparable books * Different approach to the Lebesgue integral, which makes the theory easier, more intuitive, and more accessible to undergraduate students

Introduction to Groundwater Modeling

Finite Difference and Finite Element Methods

Author: Herbert F. Wang,Mary P. Anderson

Publisher: N.A

ISBN: N.A

Category: Science

Page: 237

View: 3402

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The dramatic advances in the efficiency of digital computers during the past decade have provided hydrologists with a powerful tool for numerical modeling of groundwater systems. Introduction to Groundwater Modeling presents a broad, comprehensive overview of the fundamental concepts and applications of computerized groundwater modeling. The book covers both finite difference and finite element methods and includes practical sample programs that demonstrate theoretical points described in the text. Each chapter is followed by problems, notes, and references to additional information. This volume will be indispensable to students in introductory groundwater modeling courses as well as to groundwater professionals wishing to gain a complete introduction to this vital subject. Key Features * Systematic exposition of the basic ideas and results of Hilbert space theory and functional analysis * Great variety of applications that are not available in comparable books * Different approach to the Lebesgue integral, which makes the theory easier, more intuitive, and more accessible to undergraduate students

Introduction to the Numerical Modeling of Groundwater and Geothermal Systems

Fundamentals of Mass, Energy and Solute Transport in Poroelastic Rocks

Author: Jochen Bundschuh,Mario César Suárez A.

Publisher: CRC Press

ISBN: 0203848101

Category: Technology & Engineering

Page: 522

View: 394

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This book provides an introduction to the scientific fundamentals of groundwater and geothermal systems. In a simple and didactic manner the different water and energy problems existing in deformable porous rocks are explained as well as the corresponding theories and the mathematical and numerical tools that lead to modeling and solving them. This approach provides the reader with a thorough understanding of the basic physical laws of thermoporoelastic rocks, the partial differential equations representing these laws and the principal numerical methods, which allow finding approximate solutions of the corresponding mathematical models. The book also presents the form in which specific useful models can be generated and solved. The text is introductory in the sense that it explains basic themes of the systems mentioned in three areas: engineering, physics and mathematics. All the laws and equations introduced in this book are formulated carefully based on fundamental physical principles. This way, the reader will understand the key importance of mathematics applied to all the subjects. Simple models are emphasized and solved with numerous examples. For more sophisticated and advanced models the numerical techniques are described and developed carefully. This book will serve as a synoptic compendium of the fundamentals of fluid, solute and heat transport, applicable to all types of subsurface systems, ranging from shallow aquifers down to deep geothermal reservoirs. The book will prove to be a useful textbook to senior undergraduate and graduate students, postgraduates, professional geologists and geophysicists, engineers, mathematicians and others working in the vital areas of groundwater and geothermal resources.

Applied Groundwater Modeling

Simulation of Flow and Advective Transport

Author: Mary P. Anderson,William W. Woessner

Publisher: Academic Press

ISBN: 0080886949

Category: Science

Page: 381

View: 1277

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Creating numerical groundwater models of field problems requires careful attention to describing the problem domain, selecting boundary conditions, assigning model parameters, and calibrating the model. This unique text describes the science and art of applying numerical models of groundwater flow and advective transport of solutes. Key Features * Explains how to formulate a conceptual model of a system and how to translate it into a numerical model * Includes the application of modeling principles with special attention to the finite difference flow codes PLASM and MODFLOW, and the finite-element code AQUIFEM-1 * Covers model calibration, verification, and validation * Discusses pathline analysis for tracking contaminants with reference to newly developed particle tracking codes * Makes extensive use of case studies and problems

Optimal Management of Flow in Groundwater Systems

Author: David Philip Ahlfeld,Ann E. Mulligan

Publisher: Academic Press

ISBN: 9780120448302

Category: Computers

Page: 185

View: 5995

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CD-ROM contains: Complete FORTRAN source code for MODOFC -- Executable compiled using the Lahey F77L-EM/32 FORTRAN 77 Compiler -- Documentatiion for MODOFC -- Sample problems -- HTML files from the MODOFC Web site.

Modeling Groundwater Flow and Pollution

Author: Jacob Bear,Arnold Verruijt

Publisher: Springer Science & Business Media

ISBN: 9781556080142

Category: Science

Page: 414

View: 8043

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Groundwater constitutes an important component of many water resource systems, supplying water for domestic use, for industry, and for agriculture. Management of a groundwater system, an aquifer, or a system of aquifers, means making such decisions as to the total quantity of water to be withdrawn annually, the location of wells for pumping and for artificial recharge and their rates, and control conditions at aquifer boundaries. Not less important are decisions related to groundwater qUality. In fact, the quantity and quality problems cannot be separated. In many parts of the world, with the increased withdrawal of ground water, often beyond permissible limits, the quality of groundwater has been continuously deteriorating, causing much concern to both suppliers and users. In recent years, in addition to general groundwater quality aspects, public attention has been focused on groundwater contamination by hazardous industrial wastes, by leachate from landfills, by oil spills, and by agricultural activities such as the use of fertilizers, pesticides, and herbicides, and by radioactive waste in repositories located in deep geological formations, to mention some of the most acute contamination sources. In all these cases, management means making decisions to achieve goals without violating specified constraints. In order to enable the planner, or the decision maker, to compare alternative modes of action and to ensure that the constraints are not violated, a tool is needed that will provide information about the response of the system (the aquifer) to various alternatives.

Groundwater Modelling

An Introduction with Sample Programs in BASIC

Author: W. Kinzelbach

Publisher: Elsevier

ISBN: 9780080870168

Category: Computers

Page: 332

View: 7076

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With the growing concern about groundwater resources both with respect to quantity and quality, the need for groundwater modelling tools is increasing. Although there are a number of excellent introductions to the concepts of groundwater flow and pollution transport, the student or practising engineer wishing to develop a model and do practical work on the computer finds that there is still a gap between the understanding of concepts and the ability to handle the actual computations. A great deal of groundwater modelling software for personal computers and microcomputers has appeared recently, but taking these models from the shelf and applying them without a background on their capabilities often leads to disappointment and frustration. This book provides the reader with all necessary details to start modelling on his own. It gives a comprehensive introduction to the major techniques currently used in the modelling of groundwater flow and pollutant transport in groundwater. Both self-contained and comprehensive, it presents a wide variety of methods currently applied in the management, protection, and remediation of groundwater resources, which allows the reader to take the step from understanding the concepts to the ability to handle actual computations. All major techniques are illustrated by a total of 19 sample programs in BASIC which can be modified by the reader to suit his own need. The programs can be run directly on an Apple II+ or compatible personal computer, and with slight modifications, most can be transferred to other microcomputers with BASIC capability and at least 48K of central memory. The necessary modifications for running the programs on an IBM-PC are indicated in the appendix. Students and professionals in the fields of hydrogeology and civil and environmental engineering will find this to be an extremely useful book. Knowledge of the basic concepts of hydrogeology is assumed and, starting from that basis, the book will enable them to understand mathematical groundwater models and write computer programs of their own.

Analytic Element Modeling of Groundwater Flow

Author: H. M. Haitjema

Publisher: Elsevier

ISBN: 9780080499109

Category: Technology & Engineering

Page: 394

View: 4873

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Modeling has become an essential tool for the groundwater hydrologist. Where field data is limited, the analytic element method (AEM) is rapidly becoming the modeling method of choice, especially given the availability of affordable modeling software. Analytic Element Modeling of Groundwater Flow provides all the basics necessary to approach AEM successfully, including a presentation of fundamental concepts and a thorough introduction to Dupuit-Forchheimerflow. This book is unique in its emphasis on the actual use of analytic element models. Real-world examples complement material presented in the text. An educational version of the analytic element program GFLOW is included to allow the reader to reproduce the various solutions to groundwater flow problems discussed in the text. Researchers and graduate students in groundwater hydrology, geology, andengineering will find this book an indispensable resource. * * Provides a fundamental introduction to the use of the analytic element method. * Offers a step-by-step approach to groundwater flow modeling. * Includes an educational version of the GFLOW modeling software.

A mathematical primer on groundwater flow

an introduction to the mathematical and physical concepts of saturated flow in the subsurface

Author: John F. Hermance

Publisher: N.A

ISBN: N.A

Category: Science

Page: 230

View: 586

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Preparing users for further study in numerical modeling, this practical, succinct review of the mathematical foundations of groundwater flow connects various mathematical flow equations to actual physical situations, helping readers understand mathematical formulas by demonstrating how the relations are derived and showing the legitimacy and/or relevance of a particular relation.Organized into three parts, the guide begins with a study of the fundamental relation of groundwater flow, with discussions that include the hydrologic nature of the subsurface, plus Darcy's Law and three dimensional flow; next, it looks at steady-state flow, deriving mathematical formulas for the refraction of flux, as well as steady-state flow in unconfined aquifers; then it concludes with a review of transient flow, delving into periodic and aperiodic solutions in a confined layer to the diffusion equation for hydraulic head, and transient well discharge from a confined aquifer.For hydrologists, hydrogeologists, environmental engineers, environmental scientists, and civil engineers.

Modeling Groundwater Flow and Contaminant Transport

Author: Jacob Bear,Alexander H.-D. Cheng

Publisher: Springer Science & Business Media

ISBN: 1402066821

Category: Science

Page: 834

View: 4842

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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.

Construction Dewatering and Groundwater Control

New Methods and Applications

Author: J. Patrick Powers,Christine J. Herridge

Publisher: John Wiley & Sons

ISBN: 0471479438

Category: Science

Page: 638

View: 1642

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Twilight in the Desert reveals a Saudi oil and production industry that could soon approach a serious, irreversible decline. In this exhaustively researched book, veteran oil industry analyst Matthew Simmons draws on his three–plus decades of insider experience and more than 200 independently produced reports about Saudi petroleum resources and production operations. He uncovers a story about Saudi Arabia’s troubled oil industry, not to mention its political and societal instability, which differs sharply from the globally accepted Saudi version. It’s a story that is provocative and disturbing, based on undeniable facts, but until now never told in its entirety. Twilight in the Desert answers all readers’ questions about Saudi oil and production industries with keen examination instead of unsubstantiated posturing, and takes its place as one of the most important books of this still–young century.

Introduction to Environmental Modeling

Author: William G. Gray,Genetha A. Gray

Publisher: Cambridge University Press

ISBN: 1107571693

Category: Science

Page: 450

View: 7782

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This textbook presents the timeless basic physical and mathematical principles and philosophy of environmental modeling to students who need to be taught how to think in a different way than they would for more narrowly-defined engineering or physics problems. Examples come from a range of hydrologic, atmospheric, and geophysical problems.

Groundwater Resources Modelling

A Case Study from the UK

Author: M. G. Shepley

Publisher: Geological Society of London

ISBN: 9781862393448

Category: Science

Page: 378

View: 4123

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The UK is a country with over 150 years of widespread exploitation of its principal aquifers for public water supply. Increasing demands, greater awareness of environmental pressures and more exacting legislation has heightened the need for quantitative models to predict the impacts of groundwater use. In the UK this has culminated in a unique national, regulator-led programme for England and Wales to develop conceptual and numerical models of the principal bedrock aquifers. The outcomes of this programme will be of interest to the international hydrogeological community, particularly as international legislation such as the European Water Framework Directive requires management of water issues across administrative boundaries with a varied cast of stakeholders. The collection of papers provides a contrast between practitioner- and research-based approaches to assess and predict the anthropogenic impacts and environmental pressures.

Groundwater in the Environment

An Introduction

Author: Paul L. Younger

Publisher: John Wiley & Sons

ISBN: 1444309048

Category: Science

Page: 336

View: 1535

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This accessible new textbook provides a thorough introduction to all aspects of groundwater systems and their management. Using straightforward language and analogies to everyday experiences, it explains the origins, nature, and behavior of subsurface water without resorting to complicated mathematics. Groundwater in the Environment draws on case studies and cutting-edge research from around the world, giving a unique insight into groundwater occurring in a wide range of different climate zones and geological settings. This book: provides a robust, practical introduction to groundwater quality, and a succinct summary of modern remedial technologies for polluted groundwaters explores how groundwater fits into the wider natural environment, especially in relation to freshwater ecosystems considers the vulnerability of groundwater systems and the effects of pollution, climate change, land-use change, and overexploitation examines human dependence on water and the effect that this has on groundwater systems presents vivid examples of geohazards associated with ground waters explains the whys and wherefores of groundwater modeling examines competing philosophies of groundwater management, making the case for approaches which take social, economic and ecological issues into account. Goundwater in the Environment provides an up-to-date, essential introduction for undergraduate students of environmental sciences, geography and geology. It will also be invaluable to professionals working in various fields of natural resource management who need accessible information on groundwater but who are reluctant to read conventional texts full of mathematical notation. For practicing hydrogeologists and engineers without formal training in freshwater ecology, this book provides a `crash course' in the new frontiers of groundwater management. Artwork from the book is available to instructors online at www.blackwellpublishing.com/younger. An Instructor manual CD-ROM for this title is available. Please contact our Higher Education team at [email protected] for more information.

3D-Groundwater Modeling with PMWIN

A Simulation System for Modeling Groundwater Flow and Pollution

Author: Wen-Hsing Chiang,Wolfgang Kinzelbach

Publisher: Springer Science & Business Media

ISBN: 366205549X

Category: Science

Page: 346

View: 5874

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This book and CD-ROM offer a complete simulation system for modeling groundwater flow and transport processes. The companion full-version software (PMWIN) comes with a professional graphical user-interface, supported models and programs and several other useful modeling tools. Tools include a Presentation Tool, a Result Extractor, a Field Interpolator, a Field Generator, a Water Budget Calculator and a Graphic Viewer. Book and CD-ROM are targeted at novice and experienced groundwater modelers.

Groundwater Hydrology

Conceptual and Computational Models

Author: K. R. Rushton

Publisher: John Wiley & Sons

ISBN: 0470871652

Category: Science

Page: 430

View: 2384

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Groundwater is a vital source of water throughout the world. As the number of groundwater investigations increase, it is important to understand how to develop comprehensive quantified conceptual models and appreciate the basis of analytical solutions or numerical methods of modelling groundwater flow. Groundwater Hydrology: Conceptual and Computational Models describes advances in both conceptual and numerical modelling. It gives insights into the interpretation of field information, the development of conceptual models, the use of computational models based on analytical and numerical techniques, the assessment of the adequacy of models, and the use of computational models for predictive purposes. It focuses on the study of groundwater flow problems and a thorough analysis of real practical field case studies. It is divided into three parts: * Part I deals with the basic principles, including a summary of mathematical descriptions of groundwater flow, recharge estimation using soil moisture balance techniques, and extensive studies of groundwater-surface water interactions. * Part II focuses on the concepts and methods of analysis for radial flow to boreholes including topics such as large diameter wells, multi-layered aquifer systems, aquitard storage and the prediction of long-term yield. * Part III examines regional groundwater flow including situations when vertical flows are important or transmissivities change with saturated depth. Suitable for practising engineers, hydrogeologists, researchers in groundwater and irrigation, mathematical modellers, groundwater scientists, and water resource specialists. Appropriate for upper level undergraduates and MSc students in Departments of Civil Engineering, Environmental Engineering, Earth Science and Physical Geography. It would also be useful for hydrologists, civil engineers, physical geographers, agricultural engineers, consultancy firms involved in water resource projects, and overseas development workers.

Groundwater Geochemistry

A Practical Guide to Modeling of Natural and Contaminated Aquatic Systems

Author: Broder J. Merkel,Britta Planer-Friedrich

Publisher: Springer Science & Business Media

ISBN: 9783540746683

Category: Science

Page: 230

View: 9927

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To understand hydrochemistry and to analyze natural as well as man-made impacts on aquatic systems, hydrogeochemical models have been used since the 1960’s and more frequently in recent times. Numerical groundwater flow, transport, and geochemical models are important tools besides classical deterministic and analytical approaches. Solving complex linear or non-linear systems of equations, commonly with hundreds of unknown parameters, is a routine task for a PC. Modeling hydrogeochemical processes requires a detailed and accurate water analysis, as well as thermodynamic and kinetic data as input. Thermodynamic data, such as complex formation constants and solubility-products, are often provided as databases within the respective programs. However, the description of surface-controlled reactions (sorption, cation exchange, surface complexation) and kinetically controlled reactions requires additional input data. Unlike groundwater flow and transport models, thermodynamic models, in principal, do not need any calibration. However, considering surface-controlled or kinetically controlled reaction models might be subject to calibration. Typical problems for the application of geochemical models are: • speciation • determination of saturation indices • adjustment of equilibria/disequilibria for minerals or gases • mixing of different waters • modeling the effects of temperature • stoichiometric reactions (e.g. titration) • reactions with solids, fluids, and gaseous phases (in open and closed systems) • sorption (cation exchange, surface complexation) • inverse modeling • kinetically controlled reactions • reactive transport Hydrogeochemical models depend on the quality of the chemical analysis, the boundary conditions presumed by the program, theoretical concepts (e.g.

A Practical Guide to Groundwater and Solute Transport Modeling

Author: Karlheinz Spitz,Joanna Moreno

Publisher: Wiley-Interscience

ISBN: N.A

Category: Science

Page: 461

View: 7064

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Focusing on modeling applications, this outstanding reference provides a step-by-step, non-mathematical approach to constructing and using realistic workable groundwater models on a daily basis. Extensive detailed drawings, case studies, practical examples, and sample models illustrate important concepts. Includes data on hydrogeologic features and pollutants plus a glossary of terms.

A Basic Introduction to Pollutant Fate and Transport

An Integrated Approach with Chemistry, Modeling, Risk Assessment, and Environmental Legislation

Author: Frank M. Dunnivant,Elliot Anders

Publisher: John Wiley & Sons

ISBN: 0471758124

Category: Science

Page: 504

View: 7516

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A uniquely accessible text on environmental modeling designed for both students and industry personnel Pollutant fate and modeling are becoming increasingly important in both regulatory and scientific areas. However,the complexity of the software and models often act as an inhibitor to the advancement of water quality science. A Basic Introduction to Pollutant Fate and Transport fills the need for a basic instructional tool for students and environmental professionals who lack the rigorous mathematical background necessary to derive the governing fate and transport equations. Taking a refreshingly simple approach to the subject that requires only a basic knowledge of algebra and first-year college chemistry, the book presents and integrates all of the aspects of fate and transport, including chemistry, modeling, risk assessment, and relevant environmental legislation; approaching each topic first conceptually before introducing the math necessary to model it. The first half of the book is dedicated to the chemistry and physics behind the fate and transport models, while the second half teaches and reinforces the logical concepts underlying fate and transport modeling. This better prepares students for support jobs in the environmental arena surrounding chemical industry and Superfund sites. Contributing to the book's ease of use are: An extremely user-friendly software program, Fate, which uses basic models to predict the fate and transport of pollutants in lakes, rivers, groundwater, and atmospheric systems The use of "canned" models to evaluate the importance of model parameters and sensitivity analysis A wealth of easy-to-understand examples and problems A chapter on environmental legislation in the United States and Europe A set of lab exercises, as well as a downloadable set of teaching aids A much-needed basic text for contemporary hydrology or environmental chemistry courses and support courses forthe environmental industry, this is a valuable desk reference for educators and industry professionals.