Designation:D5610−94(Reapproved2014)StandardGuideforDefiningInitialConditionsinGroundwaterFlowModeling1ThisstandardisissuedunderthefixeddesignationD5610;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguidecoverstechniquesandproceduresusedindefininginitialconditionsformodelingsaturatedgroundwaterflow.Thespecificationofinitialconditionsisanessentialpartofconceptualizingandmodelinggroundwatersystems.1.2Thisguideoffersanorganizedcollectionofinformationoraseriesofoptionsanddoesnotrecommendaspecificcourseofaction.Thisdocumentcannotreplaceeducationorexperienceandshouldbeusedinconjunctionwithprofessionaljudgment.Notallaspectsofthisguidemaybeapplicableinallcircumstances.ThisASTMstandardisnotintendedtorepre-sentorreplacethestandardofcarebywhichtheadequacyofagivenprofessionalservicemustbejudged,norshouldthisdocumentbeappliedwithoutconsiderationofaproject’smanyuniqueaspects.Theword“Standard”inthetitleofthisdocumentmeansonlythatthedocumenthasbeenapprovedthroughtheASTMconsensusprocess.2.ReferencedDocuments2.1ASTMStandards:2D653TerminologyRelatingtoSoil,Rock,andContainedFluidsD5447GuideforApplicationofaGroundwaterFlowModeltoaSite-SpecificProblemD5609GuideforDefiningBoundaryConditionsinGround-waterFlowModeling3.Terminology3.1Definitions:3.1.1aquifer,confined—anaquiferboundedaboveandbe-lowbyconfiningbedsandinwhichthestaticheadisabovethetopoftheaquifer.3.1.2conceptualmodel—aninterpretationorworkingde-scriptionofthecharacteristicsofthephysicalsystem.3.1.3flux—thevolumeoffluidcrossingaunitcross-sectionalsurfaceareaperunittime.3.1.4groundwaterflowmodel—anapplicationofamath-ematicalmodeltorepresentagroundwaterflowsystem.3.1.5hydraulicconductivity—(fieldaquifertests),thevol-umeofwaterattheexistingkinematicviscositythatwillmoveinaunittimeunderunithydraulicgr...
