SCS-CN-based modeling of sediment yield

摘要: Coupling the soil conservation service curve number (SCN-CN) method with universal loss equation (USLE), a new model is proposed for estimation of rainstorm-generated sediment yield from watershed. The coupling based on three hypotheses: (1) runoff coefficient equal to degree saturation, (2) potential maximum retention can be expressed in terms USLE parameters, and (3) delivery ratio coefficient. applied large set rainfall-runoff-sediment data (98 storm events) obtained 12 watersheds different land uses (urban, agricultural, forest). For all computed found good agreement observed values. results analysis application show that has considerable field.