Runoff coefficients by land use and soil type Summary of runoff coefficients by land use and soil type RV coefficients A soils B soils C soils D soils Forest/Open space 0.02 0.03 0.04 0.05 Managed turf (disturbed soils) 0.15 0.20 0.22 0.25 Impervious cover 0.95 0.95 0.95 0.95