Runoff coefficients for different soil groups and slopes Source: Hydrologic Analysis and Design (4th Edition) (McCuen.
Link to this Runoff coefficients for different soil groups and slopes

Land use Soil Group A Soil Group B Soil Group C Soil Group D
0-2% 2-6% >6% 0-2% 2-6% >6% 0-2% 2-6% >6% 0-2% 2-6% >6%