Designation:D5609−94(Reapproved2015)´1StandardGuideforDefiningBoundaryConditionsinGroundwaterFlowModeling1ThisstandardisissuedunderthefixeddesignationD5609;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—ReapprovedwitheditorialchangesinSeptember2015.1.Scope*1.1Thisguidecoversthespecificationofappropriateboundaryconditionsthataretobeconsideredpartofconcep-tualizingandmodelinggroundwatersystems.Thisguidede-scribestechniquesthatcanbeusedindefiningboundaryconditionsandtheirappropriateapplicationformodelingsaturatedgroundwaterflowmodelsimulations.1.2Thisguideisoneofaseriesofstandardsongroundwa-terflowmodelapplications.DefiningboundaryconditionsisastepinthedesignandconstructionofamodelthatistreatedgenerallyinGuideD5447.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.4Thisguideoffersanorganizedcollectionofinformationoraseriesofoptionsanddoesnotrecommendaspecificcourseofaction.Thisdocumentcannotreplaceeducationorexperienceandshouldbeusedinconjunctionwithprofessionaljudgment.Notallaspectsofthisguidemaybeapplicableinallcircumstances.ThisASTMstandardisnotintendedtorepre-sentorreplacethestandardofcarebywhichtheadequacyofagivenprofessionalservicemustbejudged,norshouldthisdocumentbeappliedwithoutconsiderationofaproject’smanyuniqueaspects.Theword“Standard”inthetitleofthisdocumentmeansonlythatthedocumenthasbeenapprovedthroughtheASTMconsensusprocess.2.ReferencedDocuments2.1ASTMStandards:2D653TerminologyRelatingtoSoil,Rock,andContainedFluidsD5447GuideforApplicationofaGroundwaterFlowModeltoaSite-SpecificProblem3.Terminology3.1Forcommondefinitionsoftermsinthisstandard,ref...
