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1.1 This guide covers an overview of methods to measure well discharge. This guide is an integral part of a series of standards prepared on the in-situ determination of hydraulic properties of aquifer systems by single- or multiple-well tests. Measurement of well discharge is a common requirement to the determination of aquifer and well hydraulic properties.
1.2 This guide does not establish a fixed procedure for any method described. Rather, it describes different methods for measuring discharge from a pumping or flowing well. A pumping well is one type of control well. A control well can also be an injection well or a well in which slug tests are conducted.
1.3 This guide does not address borehole flow meters that are designed for measuring vertical or horizontal flow within a borehole.
1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
1.5 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. Furthermore, it is the user's responsibility to properly dispose of water discharged.
1.6 This guide offers an organized collection of information or a series of options and does not recommend a specific course of action. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this guide 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D653 Terminology Relating to Soil, Rock, and Contained Fluids
D1941 Test Method for Open Channel Flow Measurement of Water with the Parshall Flume
D4043 Guide for Selection of Aquifer Test Method in Determining Hydraulic Properties by Well Techniques
D5242 Test Method for Open-Channel Flow Measurement of Water with Thin-Plate Weirs
D5390 Test Method for Open-Channel Flow Measurement of Water with Palmer-Bowlus Flumes
D5716 Test Method for Measuring the Rate of Well Discharge by Circular Orifice Weir
ISO StandardRecommendation R541 Measurement of Fluid Flow by Means of Orifice Plates and Nozzles Available from American National Standards Institute, 11 W. 42nd St., 13th Floor, New York, NY 10036.
ANSI StandardStandard1042 Part 1 Methods for the Measurement of Fluid Flow in Pipes, 1, Orifice Plates, Nozzles and Venturi Tubes
ASME StandardStandard MFC-3M-1989 Measurement of Fluid Flow in Pipes Using Orifice, Nozzle, and Venturi Available from American Society of Mechanical Engineers, 345 E. 47th Street, New York, NY 10017.
ICS Number Code 17.120.20 (Flow in open channels)
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ASTM D5737-95(2006), Standard Guide for Methods for Measuring Well Discharge, ASTM International, West Conshohocken, PA, 2006, www.astm.orgBack to Top