1、Designation:D603420Standard Practice for(Analytical Procedure)Determining the Efficiency of aProduction Well in a Confined Aquifer from a Constant RatePumping Test1This standard is issued under the fixed designation D6034;the number immediately following the designation indicates the year oforiginal
2、 adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This practice describes an analytical procedure fordetermining the hydrau
3、lic efficiency of a production well in aconfined aquifer.It involves comparing the actual drawdown inthe well to the theoretical minimum drawdown achievable andis based upon data and aquifer coefficients obtained from aconstant rate pumping test.1.2 This analytical practice is used in conjunction wi
4、th thefield procedure,Test Method D4050.1.3 The values stated in inch-pound units are to be regardedas standard,except as noted below.The values given inparentheses are mathematical conversions to SI units,whichare provided for information only and are not consideredstandard.The reporting of results
5、 in units other than inch-pound shall not be regarded as nonconformance with thisstandard.1.3.1 The gravitational system of inch-pound units is usedwhen dealing with inch-pound units.In this system,the pound(lbf)represents a unit of force(weight),while the unit for massis slugs.1.4 LimitationsThe li
6、mitations of the technique for deter-mination of well efficiency are related primarily to the corre-spondence between the field situation and the simplifyingassumption of this practice.1.5 All observed and calculated values shall conform to theguidelines for significant digits and round established
7、inPractice D6026,unless superseded by this standard.1.5.1 The procedures used to specify how data are collected/recorded or calculated,in this standard are regarded as theindustry standard.In addition,they are representative of thesignificant digits that generally should be retained.The proce-dures
8、used do not consider material variation,purpose forobtaining the data,special purpose studies,or any consider-ations for the users objectives;and it is common practice toincrease or reduce significant digits of reported date to becommensurate with these considerations.It is beyond the scopeof this s
9、tandard to consider significant digits used in analysismethod for engineering design.1.6 This practice offers a set of instructions for performingone or more specific operations.This document cannot replaceeducation or experience and should be used in conjunction withprofessional judgment.Not all as
10、pects of the practice may beapplicable in all circumstances.This ASTM standard is notintended to represent or replace the standard of care by whichthe adequacy of a given professional service must be judged,nor should this document be applied without the considerationof a projects many unique aspect
11、s.The word“Standard”in thetitle of this document means only that the document has beenapproved through the ASTM consensus process.1.7 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish a
12、ppro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.8 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theD
13、evelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD3740 Practice for Minimum Requirements for AgenciesEn
14、gaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and Construction1This practice is under the jurisdiction of ASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.21 on Groundwater andVadose Zone Investigations.Current edition approve
15、d June 1,2020.Published June 2020.Originallyapproved in 1996.Last previous edition approved in 2010 as D603417.DOI:10.1520/D6034-20.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume informatio
16、n,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Or
