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Interpreting Slug Tests with Large Data Sets

Interpreting Slug Tests with Large Data Sets
Author: Robert P. Chapuis
Publisher:
Total Pages: 8
Release: 2009
Genre: Monitoring well
ISBN:

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Pressure transducers are frequently used to monitor slug tests, and to collect a data set for height Z of water column versus time t. Direct application of the data to draw a velocity graph usually produces a wide scatter, thus limiting the usefulness of the velocity graph method. This paper proposes to interpret the data set in five steps. First, a Z(t) plot is drawn to assess the uncertainty in the Z data. Second, a limited number of data points are selected to reduce the uncertainty to about ±10 % in the velocity graph. Third, the velocity graph is drawn to obtain the hydraulic conductivity k and the piezometric error H0, if any, giving the piezometric level for the test. Fourth, the graph of ln(Z-H0) versus t is drawn to verify its linearity and check the k value of the velocity graph. Fifth, the graph of Z versus log10(t) can be used in a curve fitting process to yield directly both H0 and k, thus providing a second method to interpret the data set, which may be the only one possible when the Z(t) data are inaccurate. Examples are provided to illustrate the five steps and common problems.


The Design, Performance, and Analysis of Slug Tests

The Design, Performance, and Analysis of Slug Tests
Author: James Johnson Butler, Jr.
Publisher: CRC Press
Total Pages: 281
Release: 2019-11-25
Genre: Science
ISBN: 100072722X

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The slug test can provide valuable information for hydrogeologic investigations ranging from assessments of sites of groundwater contamination to the monitoring of well deterioration through time. Inappropriate procedures in one or more phases of a test program, however, can introduce considerable error into the resulting parameter estimates. The Design, Performance, and Analysis of Slug Tests, Second Edition remedies that problem by explaining virtually all there is to know regarding the design, performance, and analysis of slug tests. The first edition has become the standard reference for all aspects of slug tests; this revised edition updates the earlier material and expands the topical coverage with new developments that have come to the fore in the intervening years between editions. Features: Describes and demonstrates the eight key steps for the performance and analysis of slug tests Presents new methods for the analysis of tests in unconfined aquifers and in highly permeable settings Expands topical coverage of LNAPL baildown tests and slug tests in small diameter wells Includes numerous flow charts that illustrate easy-to-use strategies for selection of analysis methods, and field examples demonstrate how each method should be used to get the most out of test data Offers straightforward practical guidelines that summarize the major points of each chapter Written for practicing groundwater consultants and engineers, The Design, Performance, and Analysis of Slug Tests, Second Edition will enable readers to get more reliable information from slug tests and increase the utility of this widely-used field method.


The Design, Performance, and Analysis of Slug Tests

The Design, Performance, and Analysis of Slug Tests
Author: James Johnson Butler, Jr.
Publisher: CRC Press
Total Pages: 266
Release: 1997-11-25
Genre: Technology & Engineering
ISBN: 9781566702300

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The slug test is currently the most common method for the in situ estimation of hydraulic conductivity at sites of suspected groundwater contamination. However, inappropriate procedures in one or more phases of a slug test can introduce considerable error into the resulting parameter estimates. This book remedies this problem by answering virtually every question regarding the design, performance, and analysis of slug tests. This is the first book to provide detailed information on the practical aspects of the methodology of slug tests. All major analysis methods are described in The Design, Performance, and Analysis of Slug Tests. Each analysis method is outlined in a step-by-step manner and illustrated with a field example. The major practical issues related to the field application of each technique are also discussed. This book will help the reader get more reliable parameter estimates from slug tests and increase the utility of slug test data.


Groundwater Science

Groundwater Science
Author: Charles R. Fitts
Publisher: Academic Press
Total Pages: 698
Release: 2012-08-06
Genre: Science
ISBN: 0123847052

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Groundwater Science, 2E, covers groundwater's role in the hydrologic cycle and in water supply, contamination, and construction issues. It is a valuable resource for students and instructors in the geosciences (with focuses in hydrology, hydrogeology, and environmental science), and as a reference work for professional researchers. This interdisciplinary text weaves important methods and applications from the disciplines of physics, chemistry, mathematics, geology, biology, and environmental science, introducing you to the mathematical modeling and contaminant flow of groundwater. New to the Second Edition:. New chapter on subsurface heat flow and geothermal systems. Expanded content on well construction and design, surface water hydrology, groundwater/ surface water interaction, slug tests, pumping tests, and mounding analysis.. Updated discussions of groundwater modeling, calibration, parameter estimation, and uncertainty. Free software tools for slug test analysis, pumping test analysis, and aquifer modeling. Lists of key terms and chapter contents at the start of each chapter. Expanded end-of-chapter problems, including more conceptual questions. Two-color figures. Homework problems at the end of each chapter and worked examples throughout. Companion website with videos of field exploration and contaminant migration experiments, PDF files of USGS reports, and data files for homework problems. PowerPoint slides and solution manual for adopting faculty.


The Design, Performance, and Analysis of Slug Tests

The Design, Performance, and Analysis of Slug Tests
Author: Jr., James Johnson Butler
Publisher: CRC Press
Total Pages: 263
Release: 1997-11-25
Genre: Science
ISBN: 1482229374

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The slug test is currently the most common method for the in situ estimation of hydraulic conductivity at sites of suspected groundwater contamination. However, inappropriate procedures in one or more phases of a slug test can introduce considerable error into the resulting parameter estimates. This book remedies this problem by answering virtually


Fundamentals of Ground Water

Fundamentals of Ground Water
Author: Franklin W. Schwartz
Publisher: John Wiley & Sons
Total Pages: 592
Release: 2002-12-10
Genre: Science
ISBN: 0471137855

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Fundamentals of Ground Water provides the reader with the fundamental principles of the hydraulic cycle. Also complete with illustrations and real-life case studies, this text takes a comprehensive and realistic approach to the subject of hydrology. It also contains strong interactive computer-based programs for solving and simulating hydraulics groundwater processes.


Aquifer Characterization Techniques

Aquifer Characterization Techniques
Author: Robert G. Maliva
Publisher: Springer
Total Pages: 632
Release: 2016-05-26
Genre: Science
ISBN: 3319321374

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This book presents an overview of techniques that are available to characterize sedimentary aquifers. Groundwater flow and solute transport are strongly affected by aquifer heterogeneity. Improved aquifer characterization can allow for a better conceptual understanding of aquifer systems, which can lead to more accurate groundwater models and successful water management solutions, such as contaminant remediation and managed aquifer recharge systems. This book has an applied perspective in that it considers the practicality of techniques for actual groundwater management and development projects in terms of costs, technical resources and expertise required, and investigation time. A discussion of the geological causes, types, and scales of aquifer heterogeneity is first provided. Aquifer characterization methods are then discussed, followed by chapters on data upscaling, groundwater modelling, and geostatistics. This book is a must for every practitioner, graduate student, or researcher dealing with aquifer characterization .


Aquifer Test Analysis with WindowsTM Software

Aquifer Test Analysis with WindowsTM Software
Author: William C. Walton
Publisher: CRC Press
Total Pages: 328
Release: 1996-01-10
Genre: Technology & Engineering
ISBN: 9781566701921

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The purpose of this book is to broaden and improve aquifer test analysis by generating type curves for complicated aquifer and well conditions. It simplifies type curve matching with on-screen interactive techniques, and introduces a statistical semi-automatic protocol for calibrating aquifer test site models. In addition, it discusses the validity of aquifer test analysis results. For anyone involved in aquifers and wells, this is an excellent resource for testing and analysis.


Aquifer Testing

Aquifer Testing
Author: Jonathan D. Istok
Publisher: CRC Press
Total Pages: 365
Release: 2014-07-22
Genre: Science
ISBN: 1498710751

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New! A practical, easy-to-use reference for the design and analysis of groundwater pumping and slug tests Aquifer Testing: Design and Analysis of Pumping and Slug Tests is a complete design and analysis reference emphasizing practical solutions for engineers, scientists, consultants, and students knowledgeable in basic ground water theory. T