Designation:D8297/D8297M−22StandardTestMethodforDeterminationofErosionControlProducts(ECP)PerformanceinProtectingSlopesfromSequentialRainfall-InducedErosionUsingaTiltedBedSlope1ThisstandardisissuedunderthefixeddesignationD8297/D8297M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodisusedtoevaluatetheabilityoferosioncontrolproducts(ECP)toprotectslopesfromrainfall-inducederosionusinganadjustabletiltingbedslope.Thestandardslopesrangefrom2:1to4:1(H:V)havingatargetrainfallintensityof3.5in./h[90mm/h].1.2TherearethreemainelementstheECPsmusthavetheabilitytoperform:1.Absorbtheimpactforceofraindrops,therebyreducingsoilparticlelooseninganddetachmentthrough“splash”mechanisms;2.Slowrunoffandencourageinfiltration,therebyreducingsoilparticledisplacementandtransportthrough“overlandflow”mechanisms;and3.TrapsoilparticlesbeneaththeECP.WhencomparingdatafromdifferentECPsunderconsideration,itisimportanttokeepthetestconditionsthesamefortheECPsbeingevaluated,forexample,therainfallintensityrateandtheslope.1.3Theresultsofthistestmethodcanbeusedtoevaluateperformanceandacceptability,andcanbeusedtocomparetheeffectivenessofdifferentECPs.Thismethodprovidesacom-parativeevaluationofanECPtobaselinebaresoilconditionsundercontrolledanddocumentedconditions.Thistestmethodcanprovideinformationaboutaproductthatisunderconsid-erationforaspecificapplicationwherenoperformanceinfor-mationcurrentlyexists.1.4Thistestmethodcoverstheuseofthreedifferentsoiltypes,ECPinstallation:sprayed,rolled,ordryapplied,andarunoffcollectionprocedure.Thistestistypicallyperformedindoors,butmaybeperformedoutsideaslongascertainrequirementsaremet.Partiallyenclosedfacilitiesareaccept-ableprovidingtheenvironmentalconditionsaremet.1.5Units—Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegard...
