Designation:D7208−14´1StandardTestMethodforDeterminationofTemporaryDitchCheckPerformanceinProtectingEarthenChannelsfromStormwater-InducedErosion1ThisstandardisissuedunderthefixeddesignationD7208;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—EditoriallyupdatedunitsofmeasurementstatementinApril2018.1.Scope1.1Thistestmethodcoverstheguidelines,requirements,andproceduresforevaluatingtheabilityoftemporaryditchchecksystemstoprotectearthenchannelsfromstormwater-inducederosion.Criticalelementsofthisprotectionaretheabilityofthetemporaryditchcheckto:1.1.1Sloworpondrunoff,orboth,toencouragesedimentation,therebyreducingsoilparticletransportdown-stream;1.1.2Trapsoilparticlesupstreamofstructure;and1.1.3Decreasesoilerosion.1.2Thistestmethodutilizesfull-scaletestingprocedures,ratherthanreduced-scale(bench-scale)simulation,andispatternedafterconditionstypicallyfoundonconstructionsitesattheconclusionofearthworkoperations,butpriortothestartofrevegetationwork.Thereforethistestmethodconsidersonlyunvegetatedconditions.1.3Thistestmethodprovidesacomparativeevaluationofatemporaryditchchecktobaselinebaresoilconditionsundercontrolledanddocumentedconditions.1.4AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026unlesssupersededbythisstandard.1.4.1Theproceduresusedtospecifyhowdataarecollected/recordedandcalculatedinthisstandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatshouldgenerallyberetained.Theproce-duresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsider-ationsfortheuser’sobjectives;anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatocom-mensuratewiththeseconsiderations.Itisbeyondthescopeofthisst...
