简介：ThisstudyverifiestheapplicabilityofEPICmodelforanerosionplot(61.2m2)andanuplandterracedwatershed(72ha)usingatotalof94rainfalleventsoverastudyperiodoftwoyears.Inordertoanalyzetheeffectofstormsizeonrunoffandsoillossprocesses,rainfalleventsaredividedintothreegroups:small(＜25mm),moderate(25-50mm)andlarge(＞50mm).Resultsindicatethatthemodelcouldpredictreasonablywelltherunoffandsoillossfromtheerosionplotandthewatershedforthemoderateandlargerainfallevents.However,therunoffandsoillosspredictionforthesmallrainfalleventsisfoundtobepoor.Onannualbasis,bothsurfacerunoffandsoillosspredictionsmatchwelltheobservations.Inlightoftheimportanceofthemoderateandlargerainfalleventsinproducingmostoftheannualrunoffandsoillossinthestudyarea,theEPICmodelisappliedtoassesstheimpactsoferosiononagriculturalproductivityandtoevaluatemanagementpracticestoprotectwatershedsinthemiddlemountainousareaofNepal.