Rational Method Runoff Coefficient Tables for Storm Water Runoff Calculation

Watershed runoff coefficients for calculation of storm water runoff rate can be obtained from the rational method runoff coefficient tables in this article. The watershed parameters that affect the runoff coefficient value are the land use, soil type, and slope of the watershed. A primary use for watershed runoff coefficients is calculation of design peak storm water runoff rate with the Rational Method equation, for use in storm water management projects like storm sewers or storm water detention or storm water retention basins.