ASTM_D_5473_-_D_5473M_-_15.pdf

Designation:D5473/D5473M15Standard Test Method for(Analytical Procedure for)Analyzing the Effects of PartialPenetration of Control Well and Determining the Horizontaland Vertical Hydraulic Conductivity in a Nonleaky ConfinedAquifer1This standard is issued under the fixed designation D5473/D5473M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers an analytical solution fordetermining the horizontal and vertical hydraulic conductivityof an aquifer by analysis of the response of water levels in theaquifer to the discharge from a well that partially penetrates theaquifer.This standard uses data derived from Test MethodD4050.1.2 LimitationsThe limitations of the technique for deter-mination of the horizontal and vertical hydraulic conductivityof aquifers are primarily related to the correspondence betweenthe field situation and the simplifying assumption of this testmethod.1.3 UnitsThe values stated in either inch-pound or SIunits are to be regarded separately as the standard.The valuesgiven in parentheses are for information only.1.4 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.4.1 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 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 data to becommensurate with these considerations.It is beyond the scopeof this standard to consider significant digits used in analyticalmethods for engineering design1.5 This standard does not purport to address all of thesafety problems,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4050 Test Method for(Field Procedure)for Withdrawaland Injection Well Testing for Determining HydraulicProperties of Aquifer SystemsD4105 Test Method for(Analytical Procedure)for Deter-mining Transmissivity and Storage Coefficient of Non-leaky Confined Aquifers by the Modified Theis Nonequi-librium MethodD6026 Practice for Using Significant Digits in GeotechnicalData3.Terminology3.1 Definitions:3.1.1 For common definitions of terms in this standard,referto Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 observation wella well open to all or part of anaquifer.3.2.2 unconfined aquiferan aquifer that has a water table.3.3 Symbols and Dimensions:3.3.1 a nd(Kz/Kr)1/2.3.3.2 b Lthickness of aquifer.3.3.3 d Ldistance from top of aquifer to top of screenedinterval of control well.1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.21 on Groundwater andVadose Zone Investigations.Current edition approved Nov.1,2015.Published December 2015.Originallyapproved in 1993.Last previous edition approved in 2006 as D547393(2006),which was withdrawn July 2015 and reinstated in November 2015.DOI:10.1520/D5473_D5473M15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,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 States1 3.3.4 d Ldistance from top of aquifer to top of screenedinterval of observation well.3.3.5 fsnddimensionless drawdown factor.3.3.6 KLT1hydraulic conductivity.3.3.7 KrLT1hydraulic conductivity in the plane of theaquifer,radially from the control well.3.3.8 KzLT1hydraulic conductivity normal to the planeof the aquifer.3.3.9 K0modified Bessel function of the second kind andzero order.3.3.10 l Ldistance from top of aquifer to bottom ofscreened interval of control well.3.3.11 l Ldistance from top of aquifer to bottom ofscreened interval of observation well.3.3.12 Q L3T1discharge.3.3.13 r Lradial distance from control well.3.3.14 rcdistance from pumped well at which an observeddrawdown deviation,s,would occur in the equivalent isotro-pic aqu