Designation:D7101−13StandardIndexTestMethodforDeterminationofUnvegetatedRolledErosionControlProduct(RECP)AbilitytoProtectSoilfromRainSplashandAssociatedRunoffUnderBench-ScaleConditions1ThisstandardisissuedunderthefixeddesignationD7101;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisindextestmethodestablishestheguidelines,re-quirementsandproceduresforevaluatingtheabilityofunveg-etatedrollederosioncontrolproducts(RECPs)toprotectsoilsfromsimulatedrainfall(rainsplash)andminimalrunoffinducederosion.ThecriticalelementofthisprotectionistheabilityoftheunvegetatedRECPtoabsorbtheimpactforceofraindrops,therebyreducingsoilparticlelooseningthrough“splash”mechanisms,andlimitingtheabilityofrunofftocarrytheloosenedsoilparticles.1.2Thisindextestmethodutilizesbench-scaletestingproceduresandisnotindicativeofunvegetatedRECPperfor-manceinconditionstypicallyfoundinthefield.NOTE1—Thevaluesobtainedwiththisbenchscaleprocedureareforinitialperformanceindication,generalproductcomparisonandconfor-mancepurposesonly.ThesevaluesshouldnotbeusedinestimatingRECPsoilprotectioninactualfieldusewithsuchcalculationsastheUniversalSoilLossEquation(USLE)orRevisedUniversalSoilLossEquation(RUSLE)withoutverificationfromqualified,large-scaletests.1.3Thisindextestisnotintendedtoreplacefull-scalesimulationorfieldtestinginacquisitionofperformancevaluesthatarerequiredinthedesignoferosioncontrolmeasuresutilizingunvegetatedRECPs.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunitsthatareprovidedforinforma-tiononlyandarenotconsideredstandard.1.5AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026,unlesssupersededbythisstandard.1.5.1Theproceduresusedtospecifyhowd...
