ASTM D5786-17
(Practice)Standard Practice for (Field Procedure) for Constant Drawdown Tests in Flowing Wells for Determining Hydraulic Properties of Aquifer Systems
Standard Practice for (Field Procedure) for Constant Drawdown Tests in Flowing Wells for Determining Hydraulic Properties of Aquifer Systems
SIGNIFICANCE AND USE
5.1 Constant drawdown test procedures are used with appropriate analytical procedures to determine transmissivity, hydraulic conductivity, and storage coefficient of aquifers.
Note 1: The quality of the result produced by this standard is dependent on the competence of the personnel performing it and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors: Practice D3740 provides a means of evaluating some of those factors.
SCOPE
1.1 This practice covers the methods for controlling drawdown and measuring discharge rates and head to analyze the hydraulic properties of an aquifer or aquifers.
1.2 This practice is used in conjunction with analytical procedures such as those of Jacob and Lohman (1)/(2),2 and Hantush (3).
1.3 The appropriate field and analytical procedures for determining hydraulic properties of aquifer systems are selected as described in Guide D4043.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.5 This practice offers a set of instructions for performing one or more specific operations. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this practice may be applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project's many unique aspects. The word “Standard” in the title of this document means only that the document has been approved through the ASTM consensus process.
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5786 − 17
Standard Practice for
(Field Procedure) for Constant Drawdown Tests in Flowing
Wells for Determining Hydraulic Properties of Aquifer
1
Systems
This standard is issued under the fixed designation D5786; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* D653 Terminology Relating to Soil, Rock, and Contained
Fluids
1.1 This practice covers the methods for controlling draw-
D3740 Practice for Minimum Requirements for Agencies
down and measuring discharge rates and head to analyze the
Engaged in Testing and/or Inspection of Soil and Rock as
hydraulic properties of an aquifer or aquifers.
Used in Engineering Design and Construction
1.2 This practice is used in conjunction with analytical
D4043 Guide for Selection of Aquifer Test Method in
2
procedures such as those of Jacob and Lohman (1)/(2), and
Determining Hydraulic Properties by Well Techniques
Hantush (3).
3. Terminology
1.3 The appropriate field and analytical procedures for
determining hydraulic properties of aquifer systems are se-
3.1 Definitions—For common definitions of terms used in
lected as described in Guide D4043.
this practice, refer to Terminology D653.
1.4 This standard does not purport to address all of the
4. Summary of Practice
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4.1 This practice describes the field procedures for conduct-
priate safety and health practices and determine the applica-
ing an aquifer test on a well that is flowing, that is, the head in
bility of regulatory limitations prior to use.
the well remains above the top of the well casing. This method
1.5 This practice offers a set of instructions for performing
involves inducing a constant drawdown and measuring the
one or more specific operations. This document cannot replace
varying discharge rate from the control well.
education or experience and should be used in conjunction
withprofessionaljudgment.Notallaspectsofthispracticemay
5. Significance and Use
be applicable in all circumstances. This ASTM standard is not
5.1 Constant drawdown test procedures are used with ap-
intended to represent or replace the standard of care by which
propriate analytical procedures to determine transmissivity,
the adequacy of a given professional service must be judged,
hydraulic conductivity, and storage coefficient of aquifers.
nor should this document be applied without consideration of
NOTE 1—The quality of the result produced by this standard is
a project’s many unique aspects. The word “Standard” in the
dependent on the competence of the personnel performing it and the
title of this document means only that the document has been
suitability of the equipment and facilities used. Agencies that meet the
approved through the ASTM consensus process.
criteria of Practice D3740 are generally considered capable of competent
and objective testing/sampling/inspection/etc. Users of this standard are
2. Referenced Documents
cautioned that compliance with Practice D3740 does not in itself assure
3
reliable results. Reliable results depend on many factors: Practice D3740
2.1 ASTM Standards:
provides a means of evaluating some of those factors.
1
6. Apparatus
This practice is under the jurisdiction of ASTM Committee D18 on Soil and
Rock and is the direct responsibility of Subcommittee D18.21 on Groundwater and
6.1 Various types of equipment can be used to measure the
Vadose Zone Investigations.
flow rate of the well. The equipment shall be sized so that it
Current edition approved Jan. 1, 2017. Published January 2017. Originally
approved in 1995. Last previous edition approved in 2012 as D5786 – 95 (2012).
does not constrict the flow rate from the well.
DOI: 10.1520/D5786-17.
2
6.2 An apparatus shall be placed on the control well
The boldface numbers in parentheses refer to a list of references at the end of
this standard.
discharge line such that the well can be shut in to prevent flow
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
prior to conducting this field procedure and so that the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
apparatus will not constrict flow from the well when it is
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. allowed to flow.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D5786 − 95 (Reapproved 2012) D5786 − 17
Standard Practice for
(Field Procedure) for Constant Drawdown Tests in Flowing
Wells for Determining Hydraulic Properties of Aquifer
1
Systems
This standard is issued under the fixed designation D5786; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Scope*
1.1 This practice covers the methods for controlling drawdown and measuring discharge rates and head to analyze the hydraulic
properties of an aquifer or aquifers.
2
1.2 This practice is used in conjunction with analytical procedures such as those of Jacob and Lohman (1)/(2), and Hantush
(3)/(4).
1.3 The appropriate field and analytical procedures for determining hydraulic properties of aquifer systems are selected as
described in Guide D4043.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
1.5 This practice offers a set of instructions for performing one or more specific operations. This document cannot replace
education or experience and should be used in conjunction with professional judgment. Not all aspects of this practice may be
applicable in all circumstances. This ASTM standard is not intended to represent or replace the standard of care by which the
adequacy of a given professional service must be judged, nor should this document be applied without consideration of a project’s
many unique aspects. The word “Standard” in the title of this document means only that the document has been approved through
the ASTM consensus process.
2. Referenced Documents
3
2.1 ASTM Standards:
D653 Terminology Relating to Soil, Rock, and Contained Fluids
D3740 Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in
Engineering Design and Construction
D4043 Guide for Selection of Aquifer Test Method in Determining Hydraulic Properties by Well Techniques
D4750 Test Method for Determining Subsurface Liquid Levels in a Borehole or Monitoring Well (Observation Well)
4
(Withdrawn 2010)
3. Terminology
3.1 Definitions—For common definitions of terms used in this practice, see refer to Terminology D653.
4. Summary of Practice
4.1 This practice describes the field procedures for conducting an aquifer test on a well that is flowing, that is, the head in the
well remains above the top of the well casing. This method involves inducing a constant drawdown and measuring the varying
discharge rate from the control well.
1
This practice is under the jurisdiction of ASTM Committee D18 on Soil and Rock and is the direct responsibility of Subcommittee D18.21 on Groundwater and Vadose
Zone Investigations.
Current edition approved May 1, 2012Jan. 1, 2017. Published December 2012January 2017. Originally approved in 1995. Last previous edition approved in 20062012
as D5786 – 95 (2006).(2012). DOI: 10.1520/D5786-95R12.10.1520/D5786-17.
2
The boldface numbers in parentheses refer to a list of references at the end of this standard.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D5786 − 17
5. Significance and Use
5.1 Constant drawdown test procedures are used with appropriate analytical procedures to determine transmissivity, hydraulic
conductivity, and storage coefficient of aquifers.
NOTE 1—The quality of the result produced by this standard is dependent on the competence of the personnel performing it and the suitability of the
equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective
testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable
results de
...
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