Designation:D4822−88(Reapproved2019)StandardGuideforSelectionofMethodsofParticleSizeAnalysisofFluvialSediments(ManualMethods)1ThisstandardisissuedunderthefixeddesignationD4822;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguidecoverstheselectionofmethodsfordeter-miningthesizedistributionoffluvialsedimentsparticlesintherangegreaterthan0.45µmusingmanualmethods.Manualmethodsaredefinedasthosemethodsthatrequiretheoperatortodosomeactualmeasurementsandcalculations.Anauto-matedmethodwouldbeonewhich,afterthesampleispreparedandinsertedintoaninstrument,theinstrument(machine)doesthemeasuringandcalculations,nottheopera-tor.Notallmanualmethodsarepresentedinthisguide.However,whereavailable,atleasttwomethodsforeachparticlesizerangearegiven.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D422TestMethodforParticle-SizeAnalysisofSoils(With-drawn2016)3D1129TerminologyRelatingtoWaterD4410TerminologyforFluvialSedimentD4411GuideforSamplingFluvialSedimentinMotionE20PracticeforParticleSizeAnalysisofParticulateSub-stancesintheRangeof0.2to75MicrometresbyOpticalMicroscopy(Withdrawn1994)33.Terminology3.1Definitions:3.1.1Fordefinitionsoftermsuse...
