Numerical Simulations of Groundwater Flow and Solute Transport in the Lake 233 Aquifer PDF Download

Author: M. H. Klukas
Publisher: Chalk River, Ont. : Environmental Research Branch, Chalk River Laboratories
ISBN: 9780660162058
Category : Groundwater
Languages : en
Pages : 54

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Author: M. H. Klukas
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Book Description
This is volume 5, dealing with the surry nuclear power plant, of a seven-volume report of work done at battelle's columbus laboratories to estimate the amount of radioactive material that could be released from light water reactor (lwr) power plants under specific, hypothetical accident conditions. to make these estimates, five power plants were selected that represent the major categories of lwrs: three pressurized water reactors (pwrs) and two boiling water reactors (bwrs). specifications and data from these plants, along with data from laboratory experiments, were input to computer codes designed to describe various conditions prevailing and physical processes occuring inside reactor systems, including the containment and other buildings. ultimately, these computer codes provide an estimate of how much radioactive material would be able to escape to the environment if a specific series of events (an "accident sequence") took place. this volume reports the results of the analysis of the surry power station, a westinghouse pwr housed in a large, dry, high-pressure containment building. the specific accident sequences investigated for the surry plant were selected to represent cases of high risk, severe consequences, and most importantly, a wide range of physical conditions. the computer codes used to analyze the accident sequences include the new code march 2. the surry plant was previously examined in this study using an earlier version of the code, march 1.1; those results were reported in volume 1 of this series. other power plants included in the study are peach bottom bwr (volume 2); grand gulf bwr (volume 3); sequoyah pwr (volume 4); and zion pwr (volume 6). the seventh volume will address technical questions raised during peer review meetings sponsored by the nuclear regulatory commission.

Author: Bill X. Hu
Publisher:
ISBN:
Category : Science
Languages : en
Pages :

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Numerical simulation of groundwater flow and solute transport in a dual-permeability karst aquifer is a challenging issue, since groundwater flow in karst conduit network can become non-darcian even turbulent flow. The discrete-continuum model is a relatively new modeling method, which accounts for turbulent and laminar flow in karst aquifer. MODFLOW-CFP (Conduit Flow Process) is compared to the MODFLOW, a numerical code based on Darcy law, to evaluate the accuracy in a sub-regional scale karst aquifer. MODFLOW-CFP is more accurate than the MODFLOW when comparing the head simulation results with field measurements. After that, the CFPv2 and UMT3D numerical models are applied in the WKP to establish a sub-regional scale model to simulate chloride transport processes in the last four decades, and to predict contamination development. Numerical simulation results indicate sprayfields are the major chloride source in the study region. Conduit networks significantly control solute transport and contaminant distribution in the study region. Chloride transports through conduits rapidly and spread to several large contamination plumes in a short period. Chloride concentration started to increase in 1980s due to the operation of sparyfield. Solute transport simulation results by discrete-continuum models are more accurate because of the precise description of conduit network.

Author: Michael L. Merritt
Publisher:
ISBN:
Category : Groundwater flow
Languages : en
Pages : 156

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Author: Jacob Bear
Publisher: Springer Science & Business Media
ISBN: 1402066821
Category : Science
Languages : en
Pages : 851

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Book Description
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.

Author: Thomas C. Winter
Publisher:
ISBN:
Category : Groundwater flow
Languages : en
Pages : 56

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Author: Nilkanth Kulkarni
Publisher: LAP Lambert Academic Publishing
ISBN: 9783845442532
Category :
Languages : en
Pages : 252

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Book Description
The book is written for UG & PG students of civil and environmental engineering and earth sciences. Teachers, researchers and policy makers dealing with water will find it a useful reading material. The book introduces the subject of numerical groundwater flow and solute transport modeling followed by relevant review of literature. Chapter 3 looks to finite difference, finite element, random walk and modified method of characteristics models for groundwater flow and solute transport simulation. Chapter 4 considers validation and implementation of these models for various test cases. Chapter 5 examines the adequacy of best performed coupled model for field problem.

Author: Tian-Chyi Jim Yeh
Publisher: Cambridge University Press
ISBN: 1316511189
Category : Science
Languages : en
Pages : 365

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Book Description
This book provides a unified and comprehensive overview of physical explanations of the stochastic concepts of solute transport processes, important scaling issues, and practical tools for the analysis of solute transport.

Author: Mary P. Anderson
Publisher: Academic Press
ISBN: 0080916384
Category : Technology & Engineering
Languages : en
Pages : 632

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Book Description
This second edition is extensively revised throughout with expanded discussion of modeling fundamentals and coverage of advances in model calibration and uncertainty analysis that are revolutionizing the science of groundwater modeling. The text is intended for undergraduate and graduate level courses in applied groundwater modeling and as a comprehensive reference for environmental consultants and scientists/engineers in industry and governmental agencies. Explains how to formulate a conceptual model of a groundwater system and translate it into a numerical model Demonstrates how modeling concepts, including boundary conditions, are implemented in two groundwater flow codes-- MODFLOW (for finite differences) and FEFLOW (for finite elements) Discusses particle tracking methods and codes for flowpath analysis and advective transport of contaminants Summarizes parameter estimation and uncertainty analysis approaches using the code PEST to illustrate how concepts are implemented Discusses modeling ethics and preparation of the modeling report Includes Boxes that amplify and supplement topics covered in the text Each chapter presents lists of common modeling errors and problem sets that illustrate concepts

Author: Mark Goltz
Publisher: John Wiley & Sons
ISBN: 1119300231
Category : Science
Languages : en
Pages : 262

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Book Description
Teaches, using simple analytical models how physical, chemical, and biological processes in the subsurface affect contaminant transport Uses simple analytical models to demonstrate the impact of subsurface processes on the fate and transport of groundwater contaminants Includes downloadable modeling tool that provides easily understood graphical output for over thirty models Modeling tool and book are integrated to facilitate reader understanding Collects analytical solutions from many sources into a single volume and, for the interested reader, shows how these solutions are derived from the governing model equations