The runoff curve number (also called a curve number or simply CN) is an empirical parameter used in hydrology for predicting direct runoff or infiltration from rainfall excess. The curve number method was developed by the USDA Natural Resources Conservation Service, which was formerly called the Soil Conservation Service or SCS — the number is still popularly known as a "SCS runoff curve number" in the literature. The runoff curve number was developed from an empirical analysis of r… WebThe Soil Conservation Service Curve Number (SCS-CN) model developed by Soil Conservation Services (SCS) of USA in 1969 is a simple, predictable and stable conceptual method for estimation of direct runoff depth based on storm rainfall depth (USDA SCS, 1969). It relies on only one parameter, i.e. curve number (CN). Currently, it is a well-
Hydrology And Soil Conservation Engineering Including Watershed …
Webwhere S is in inches. The curve number CN values range from approximately 30 for permeable soils with high infiltration rates to 100 for water bodies and soils with low … WebThis relationship, after algebraic manipulation and inclusion of simplifying assumptions, results in the following equation found in Section 4 of the National Engineering Handbook … earth\u0027s wind patterns map
Revisiting the Soil Conservation Service Curve Number Method
WebS can be represented as a change of soil moisture content and in this context is commonly used to estimate direct runoff, especially in the Soil Conservation Service (SCS) curve … WebThe SCS CN method estimates precipitation excess as a function of the cumulative precipitation, soil cover, land use, and antecedent soil moisture. The input requirements … WebBasics of Soil Conservation Service Curve Number (SCS-CN) Equation: The SCS CN is based on the water balance where two hypothesis (ratio of actual amount of direct runoff to the total rainfall and actual infiltration to the potential maximum retention) are equated to form the equation. The equation (1) is the basic equation of SCS CN. Q = earth\\u0027s wobble effect on climate