简介：TheUnitedStatesDepartmentofAgriculture(USDA)AnnualizedAgriculturalNon-PointSourcePollutionmodel(AnnAGNPS)isusedtohelpevaluateawatershedresponsetoagriculturalmanagementpracticestocontrolwaterquality.However,AnnAGNPSversion3.5doesnotcontainfeaturestoestimatetheeffectofariparianbuffer(RB)systemonwaterquality.TheRiparianEcosystemManagementModel(REMM)isusedtosimulatetheimpactofriparianbuffersystemsonwaterquality.However,frequentlythelackofmeasureduplandloadingsthatarerequiredbyREMMsimulationlimitstheapplicationofREMM.Toaddressthisdatagap,astudywasconductedtointegrateAnnAGNPSwithREMMforRBsystemsimulation.AnnAGNPSwasusedtosimulatewaterandsedimentloadingsfromanuplandfieldintoathree-zoneRBsystemattheGibbsFarmlocatedintheGeorgiacoastalplain.TheseAnnAGNPSoutputswereusedastheinputstoREMM.REMMwasusedtosimulatewaterandsedimentmovementalongtheriparianbuffers.TheAnnAGNPSsimulatedamountofannualrunoffattheedgeofthefieldwasclosetoobservedamounts(Nash-Sutcliffeefficiencyof0.92).Itisbelievedthatasubstantialportionofsandwasremovedfromtherunoffonemeterintothegrassbufferwherethesamplerswerelocated;therefore,sandwasexcludedfromtheAnnAGNPSsimulationforcomparisonwithobservedsediment.Excludingsand,theAnnAGNPSpredictedamountofannualsedimentmatchestheobservedamountfairlywell(Nash-Sutcliffeefficiencyof0.46).Inaddition,basedonevaluatingthepercentreductionofsedimentateachzonalinterface,theAnnAGNPS/REMMmodelwellsimulatedthefunctionoftheRBsystemtoreducesediment.