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Curve Number Method For Estimating Runoff. Q PI PI S PI QPI a a a a 2 0. The curve number method generally performed well in simulating surface run-off in the studied watersheds. The Soil Conservation Service-Curve Number SCS-CN method developed by National Resources Conservation Service NRSC United States Department of Agriculture USDA is simple predictable and stable conceptual method for estimation of direct runoff depth based on storm rainfall depth. The SCS Runoff Curve Number The RCN Runoff Curve Number method was originally established by the SCS in 1954.
The Soil Conservation Service Curve Number SCS-CN method is widely used in determination of surface run-off in long-term continuous hydrologic simulation models. A Development The curve number runoff equation is. That is the relationship excludes time as a variable. Curve number method Where F Actual retention mm. The method is described in detail in National Engineering Handbook 2004. USDASCS Curve Number Method.
The curve number method generally performed well in simulating surface run-off in the studied watersheds.
There was no difference in the performance of the curve number method in simulating surface run-off under low and high antecedent rainfall. The method is described in detail in National Engineering Handbook 2004. Originally the methodology was intended to calculate total infiltration during a storm. SCS curve numbers are used to estimate the amount of precipitation which becomes runoff and the amount which infiltrates into the soil. An early version of the relation-ship was described by Mockus 1949. The SCS Runoff Curve Number The RCN Runoff Curve Number method was originally established by the SCS in 1954.