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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. [1] The curve number method was developed by the USDA Natural Resources Conservation Service , which was formerly called the Soil Conservation Service or SCS — the ...
The runoff curve number was developed from an empirical analysis of runoff from small catchments and hillslope plots monitored by the USDA. It is widely used and is an efficient method for determining the approximate amount of direct runoff from a rainfall event in a particular area.
This approach is adopted from the NRCS (SCS) curve number method for estimating runoff. It assumes that the total infiltration capacity of a soil can be found from the soil's tabulated curve number. During a rain event this capacity is depleted as a function of cumulative rainfall and remaining capacity.
The runoff curve number at various sites on Blizzards Run ranged from 68.6 to 81.6 in 2010. The average runoff curve number between these sites was 74.9. The predicted runoff curve numbers of the stream for 2020 range from 69.5 to 82.0, with an average of 75.3.
Runoff model (reservoir), a mathematical model involving rainfall and runoff; Runoff curve number, an empirical parameter used in hydrology; RUNOFF, the first computer text-formatting program; Runoff or run-off, another name for bleed, printing that lies beyond the edges to which a printed sheet is trimmed; Runoff or run-off, a stock market term
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