Download or read book Report of Groundwater Flow and Contaminant Migration Modeling at the Ammunition Burning Ground Crane NSWC Indiana written by Henk M. Haitjema and published by . This book was released on 1994 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Groundwater Modeling written by Paul Van der Heijde and published by . This book was released on 1989 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Groundwater Modeling Flow and Contaminated Migration written by William C. Walton and published by CRC-Press. This book was released on 1988-12-01 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Simulation of Contaminant Migration in Ground Water at the Lawrence Livermore National Laboratory written by and published by . This book was released on 1995 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report reviews a set of two-dimensional ground water flow and contaminant transport simulations in the upper aquifer materials beneath Lawrence Livermore National Laboratory (LLNL). The transport simulations focus on the migration, dilution, extraction, and potential degradation of existing aqueous volatile organic compounds (VOCs) in ground water, under both ambient flow and remedial pumping conditions. Simulations are used to show how, where, and at what rate vertically-averaged concentrations decrease to acceptable levels. Both the flow and transport calculations are made with a slightly modified version of the CFEST finite-element code. The hydrogeologic study area is defined to be the upper 200 feet of the saturated sediments within a 25 square mile area surrounding LLNL. Migration calculations focus on a single surrogate total-VOC (TVOC), equal to the sum of all VOC concentrations. Under natural flow conditions, and in the absence of intrinsic contaminant degradation, the results indicate that 800 y are required for the vertically-averaged TVOC concentrations to reduce to 5 parts per billion (ppb) or less in all parts of the study area. Although contaminant levels at several nearby agricultural wells may exceed 5 ppb during this time, levels at the municipal pumping wells in downtown Livermore never exceed 1 ppb. Under non-remedial conditions with an assumed linear TVOC degradation model corresponding to a 50 y half-life, simulation results indicate that all concentrations reduce to 5 ppb in 160 y, with very little impact on water quality at neighboring agricultural or municipal wells. Results of three additional simulations of TVOC migration under the influence of remedial pumping wells indicate that vertically-averaged TVOC concentrations uniformly reach 5 ppb (or below) within 50 to 75 y with little or no impact on water quality at nearby agricultural and municipal wells.
Download or read book Numerical Groundwater Flow written by William C. Walton and published by CRC-Press. This book was released on 1989-01-01 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: This valuable new book, with 2 programs on diskettes, will help practitioners in solving groundwater flow and contamination problems by integrating simulation techniques. The reader is expected to have knowledge of hydrogeology, and have access to books on groundwater hydrogeology. Two microcomputer programs, in compiled FORTRAN 77 with source codes for simulating quasi-three-dimensional groundwater flow and contaminant migration, are presented in this book. The numerical and analytical techniques incorporated in these programs are described in detail. Data entry has been simplified so that the user can run the programs without worrying about FORTRAN input file structures and editors. The basic requirements are a monitor, dot-matrix printer, and an IBM-PC or compatible computer running DOS Version 2.1 or compatible. Programs require a full 640K RAM (minus that used by DOS) for their operation.
Download or read book Simulation of Ground water Flow and Potential Contaminant Transport at Area 6 Landfill Naval Air Station Whidbey Island Island County Washington written by F. W. Simonds and published by . This book was released on 2002 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analytical Modeling of Solute Transport in Groundwater written by Mark Goltz and published by John Wiley & Sons. This book was released on 2017-02-08 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Modeling Groundwater Flow and Pollution written by Jacob Bear and published by Springer. This book was released on 1987-09-30 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Summary Review of Available Models for Groundwater Flow and Contaminant Migration written by F. Quercia and published by . This book was released on 1993 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Simulation of Ground water Flow and Application to the Design of a Contaminant Removal System Loring Air Force Base Maine written by J. Jeffrey Starn and published by . This book was released on 1997 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Groundwater Modeling Flow and Contaminated Migration written by William C. Walton and published by Springer. This book was released on 1989 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Programs for simulation and graphing of uncomplicated, two-dimensional groundwater flow.
Download or read book Phase I Hydrologic Data for the Groundwater Flow and Contaminant Transport Model of Corrective Action Unit 97 written by John McCord and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Department of Energy (DOE), National Nuclear Security Administration Nevada Site Office (NNSA/NSO) initiated the Underground Test Area (UGTA) Project to assess and evaluate the effects of the underground nuclear weapons tests on groundwater beneath the Nevada Test Site (NTS) and vicinity. The framework for this evaluation is provided in Appendix VI, Revision No. 1 (December 7, 2000) of the Federal Facility Agreement and Consent Order (FFACO, 1996). Section 3.0 of Appendix VI ''Corrective Action Strategy'' of the FFACO describes the process that will be used to complete corrective actions specifically for the UGTA Project. The objective of the UGTA corrective action strategy is to define contaminant boundaries for each UGTA corrective action unit (CAU) where groundwater may have become contaminated from the underground nuclear weapons tests. The contaminant boundaries are determined based on modeling of groundwater flow and contaminant transport. A summary of the FFACO corrective action process and the UGTA corrective action strategy is provided in Section 1.5. The FFACO (1996) corrective action process for the Yucca Flat/Climax Mine CAU 97 was initiated with the Corrective Action Investigation Plan (CAIP) (DOE/NV, 2000a). The CAIP included a review of existing data on the CAU and proposed a set of data collection activities to collect additional characterization data. These recommendations were based on a value of information analysis (VOIA) (IT, 1999), which evaluated the value of different possible data collection activities, with respect to reduction in uncertainty of the contaminant boundary, through simplified transport modeling. The Yucca Flat/Climax Mine CAIP identifies a three-step model development process to evaluate the impact of underground nuclear testing on groundwater to determine a contaminant boundary (DOE/NV, 2000a). The three steps are as follows: (1) Data compilation and analysis that provides the necessary modeling data that is completed in two parts: the first addressing the groundwater flow model, and the second the transport model. (2) Development of a groundwater flow model. (3) Development of a groundwater transport model. This report presents the results of the first part of the first step, documenting the data compilation, evaluation, and analysis for the groundwater flow model. The second part, documentation of transport model data will be the subject of a separate report. The purpose of this document is to present the compilation and evaluation of the available hydrologic data and information relevant to the development of the Yucca Flat/Climax Mine CAU groundwater flow model, which is a fundamental tool in the prediction of the extent of contaminant migration. Where appropriate, data and information documented elsewhere are summarized with reference to the complete documentation. The specific task objectives for hydrologic data documentation are as follows: (1) Identify and compile available hydrologic data and supporting information required to develop and validate the groundwater flow model for the Yucca Flat/Climax Mine CAU. (2) Assess the quality of the data and associated documentation, and assign qualifiers to denote levels of quality. (3) Analyze the data to derive expected values or spatial distributions and estimates of the associated uncertainty and variability.
Download or read book Contaminated Ground Water and Sediment written by Calvin C. Chien and published by CRC Press. This book was released on 2003-11-24 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the documented result of an expert workshop, Modeling and Management of Emerging Environmental Issues, held at Penn State University. This event assembled four panels of modeling experts from the U.S. and Canada to discuss modeling technology development and application in order to promote sound and cost-effective environmental decision-making. This thorough analysis provides an overview on the state-of-the-art in current practice and identifies emerging research and development trends within modeling technology. Each of the discussions considers not only technical issues, but regulatory and cost factors as well.
Download or read book Contaminant Transport in Groundwater written by H.E. Kobus and published by CRC Press. This book was released on 1989-01-01 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceeding of a symposium on Contaminant transport in groundwater held in Stuttgart, April 1989. Topics covered include: Field methods & data processing; Field studies & tracer experiments; Contaminant chemistry & column experiments; Modelling of chemistry coupled to transport; Dispersion theory & transport in fractured media; Numerical aspects of modelling, parameter identification & optimization; Multiphase flow & transport in saturated soil.
Download or read book Proceedings written by International Symposium on Ground Water Monitoring and Management and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Groundwater Flow and Mass Transport Modeling written by and published by . This book was released on 2006 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers presented at various inter-disciplinary and multi-institutional training programmes, held at Andhra University during 23 January-4 February, 2006.
Download or read book Dream Analytical Ground Water Flow Programs written by Stewart Rounds and published by CRC Press. This book was released on 2020-10-28 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: Valuable for consultants and regulators...Dream is a useful tool for basic field work, including the first-cut evaluation of remediation design. Ground water professionals will find Dream to be ideal for estimating actual flow conditions when information on aquifer properties is limited. Flow nets, streamline plots, and capture zone maps are easily produced by contouring Dream's output files. Maps of head, drawdown, and ground water velocity are equally simple to create. These provide an uncomplicated method for estimating both direction and magnitude of flow, and the areal extent of the well's influence. This must-have volume is valuable for hydrologists, regulators, ground water professionals, students, professors, and consultants. This work is a valuable teaching tool for principles of subsurface hydrology. It is easy-to-use and illustrates hydrologic concepts, pumping schemes, remediation schemes, etc. The importance of fundamental aquifer properties can be easily explored, at both the graduate and undergraduate levels.
