ASTM_D_6029_-_96_2010e1.pdf

Designation:D602996(Reapproved 2010)1Standard Test Method(Analytical Procedure)forDetermining Hydraulic Properties of a Confined Aquifer anda Leaky Confining Bed with Negligible Storage by theHantush-Jacob Method1This standard is issued under the fixed designation D6029;the number immediately following the designation indicates the year oforiginal 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.1NOTEThe units statement in 1.4 was revised editorially in August 2010.1.Scope1.1 This test method covers an analytical procedure fordetermining the transmissivity and storage coefficient of aconfined aquifer and the leakance value of an overlying orunderlying confining bed for the case where there is negligiblechange of water in storage in a confining bed.This test methodis used to analyze water-level or head data collected from oneor more observation wells or piezometers during the pumpingof water from a control well at a constant rate.With appropriatechanges in sign,this test method also can be used to analyzethe effects of injecting water into a control well at a constantrate.1.2 This analytical procedure is used in conjunction withTest Method D4050.1.3 LimitationsThe valid use of the Hantush-Jacobmethod is limited to the determination of hydraulic propertiesfor aquifers in hydrogeologic settings with reasonable corre-spondence to the assumptions of the Theis nonequilibriummethod(Test Method D4106)with the exception that in thiscase the aquifer is overlain,or underlain,everywhere by aconfining bed having a uniform hydraulic conductivity andthickness,and in which the gain or loss of water in storage isassumed to be negligible,and that bed,in turn,is bounded onthe distal side by a zone in which the head remains constant.The hydraulic conductivity of the other bed confining theaquifer is so small that it is assumed to be impermeable(seeFig.1).1.4 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to inch-pound units,which are provided forinformation only and are not considered standard.1.4.1 The converted inch-pound units use the gravitationalsystem of units.In this system,the pound(lbf)represents a unitof force(weight),while the unit for mass is slugs.Theconverted slug unit is not given,unless dynamic(F=ma)calculations are involved.1.5 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 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 ContainedFluidsD4050 Test Method for(Field Procedure)for Withdrawaland Injection Well Testing for Determining HydraulicProperties of Aquifer SystemsD4106 Test Method for(Analytical Procedure)for Deter-mining Transmissivity and Storage Coefficient of Non-leaky Confined Aquifers by the Theis NonequilibriumMethodD6028 Test Method(Analytical Procedure)for DeterminingHydraulic Properties of a Confined Aquifer Taking intoConsideration Storage of Water in Leaky Confining Bedsby Modified Hantush Method3.Terminology3.1 Definitions:3.1.1 aquifer,confined,nan aquifer bounded above andbelow by confining beds and in which the static head is abovethe top of the aquifer.3.1.2 aquifer,unconfined,nan aquifer is unconfined whereit has a water table.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 Aug.1,2010.Published September 2010.Originallyapproved in 1996.Last previous edition approved in 2004 as D602996(2004).DOI:10.1520/D6029-96R10E01.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.3 coeffcient of leakage,nsee leakance.3.1.4 confining bed,na hydrogeologic unit of less perme-able material bounding one or more aquifers.3.1.5 control well,nwell by which the head and flow inthe aquifer is changed,for example,by pumping,injection,orchange of head.3.1.6 drawdown,nvertical distance the static head islowered due to the removal of water.3.1.7 head,nsee head,static.3.1.8 head,static,nthe height above a standard datum ofthe surface of a column of water(or other liquid)that can besupported by the static pressure at a given point.3.1.9 hydraulic conductivity,n(field aquifer test)the vol-ume of water at the existing kinematic viscosity that will movein a unit time under a un