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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


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

Download The Design, Performance, and Analysis of Slug Tests Book in PDF, ePub and Kindle

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.


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, Second Edition

The Design, Performance, and Analysis of Slug Tests, Second Edition
Author: James Johnson Butler, Jr.
Publisher: CRC Press
Total Pages: 290
Release: 2016-04-15
Genre: Science
ISBN: 9781466595903

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This edition serves as a resource for field practitioners in the planning, performance, and analysis of slug tests that will produce more reliable parameter estimates. It updates the previously presented material and expands the coverage into new areas. It includes a new set of practical guidelines for the design, performance, and analysis of slug tests; all new field examples; extensive coverage of slug tests in wells; considerations for barometric pressure changes; and discussions of new software for the processing and analysis of slug-test data.


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: 2019-11-25
Genre: Science
ISBN: 9780367815509

Download The Design, Performance, and Analysis of Slug Tests Book in PDF, ePub and Kindle

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.


Slug Test Data Analysis

Slug Test Data Analysis
Author: Susan Marie Goetz
Publisher:
Total Pages: 144
Release: 1994
Genre:
ISBN:

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Disagreeing Evaluations for Slug Tests in Monitoring Wells: Importance of Standards

Disagreeing Evaluations for Slug Tests in Monitoring Wells: Importance of Standards
Author: Robert P. Chapuis
Publisher:
Total Pages: 28
Release: 2019
Genre: Aquifers
ISBN:

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Hundreds of variable-head permeability (slug) tests were carried out in monitoring wells to assess the hydraulic conductivity, K, of an unconfined sand-and-gravel aquifer and, after that, the migration of contaminants. The pollution case has generated a legal dispute about the loss of many water supply wells and major health issues. The experts for the defendants had analyzed the slug test data with methods that differ from the standards. For the legal issues, the author reanalyzed all test data and made all verifications as required by standards. The new K values were about three times higher than the initial values obtained without respect to the standards, a major difference. The divergence was solved by studying the statistical distributions of K values. The initial values were too low to explain the high K values obtained with pumping tests, but the new K values correctly explained them. The new K values predicted groundwater velocity values at least three times higher than the initial values predicted with K values obtained without following the standards. These higher velocities were confirmed by field tracer tests performed by independent companies that designed and operated field pilot tests for decontaminating groundwater. The capacity to reconcile medium-scale tests (slug tests in monitoring wells) and large-scale tests (pumping tests in large wells) forms new evidence that strengthens the reasons for why it is important to follow the standards and make the required verifications.


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.