LAND USE | Runoff Coefficients | Inlet Times (minutes) | ||
Flat | Rolling | Steep | ||
Commercial (CBD) | 0.75 | 0.83 | 0.90 | 5 |
Neighborhood Commercial | 0.50 | 0.60 | 0.70 | To be Computed |
Industrial | 0.63 | 0.70 | 0.77 | 5 - 10 |
One-Acre Lots | 0.26 | 0.30 | 0.34 | |
Half-Acre Lots | 0.31 | 0.35 | 0.39 | |
Quarter-Acre Lots | 0.36 | 0.40 | 0.44 | 10 - 15 |
Parkland | 0.18 | 0.20 | 0.22 | To be Computed |
1. Flat terrain 0 - 2% slopes.
2. Rolling terrain 2 - 7% slopes.
3. Steep terrain greater than 7% slopes
4. Interpolation, extrapolation and adjustment for local conditions shall be based on engineering experience and judgment.