SWAT – Land Phase of the Hydrologic Cycle. Kristina Schneider Kristi Shaw. Surface Water Runoff. Calculates surface runoff volumes and peak runoff rates using daily rainfall amounts Runoff volume estimated using a modification of the SCS Curve Number Technique.
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R is rainfall & Q is daily runoff
tc can be estimated by adding the surface and channel flow times.
Alpha is a dimensionless parameter that expresses the proportion of total rainfall that occurs during tc.
Q is a daily runoff.
A is the drainage Area.
qp = peak rate
qp*=peak rate per unit of rainfall