Runoff = 0.21 cfs @ 12.19 hrs, Volume= 0.028 af, Depth=11.17" Routed to Link 8L : Existing Study Area Road (Total)
Runoff by SCS TR-20 method, UH=Delmarva, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 100-Year-Projected Rainfall=11.41"
Area (ac) CN Description
0.030 98 Paved parking, HSG A
0.030 98 100.00% Impervious Area
Tc (min) Length (feet) Slope (ft/ft) Velocity (ft/sec) Capacity (cfs)
1.0 82 0.0150 1.32 Sheet Flow, A-B Smooth surfaces n = 0.011 P2= 4.04"
1.0 82 Total, Increased to minimum Tc = 10.0 min
Subcatchment 6S: Ex. Study Area Road (Imp)
2026-02 Existing and Proposed NOAA 24-hr D 100-Year-Projected Rainfall=11.41"
Prepared by Dynamic Engineering Printed 2/10/2026
HydroCAD\circledR 10.20-8a s/n 08640\circledR 2025 HydroCAD Software Solutions LLC Page 118
Runoff = 0.22 cfs @ 12.21 hrs, Volume= 0.029 af, Depth= 2.87"
Routed to Link 8L : Existing Study Area Road (Total)
Runoff by SCS TR-20 method, UH=Delmarva, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs NOAA 24-hr D 100-Year-Projected Rainfall=11.41"
| Area (ac) | CN | Description |
|---|---|---|
| 0.120 | 39 | >75% Grass cover, Good, HSG A |
| 0.120 | 39 | 100.00% Pervious Area |
| Tc (min) | Length (feet) | Slope (ft/ft) Velocity (ft/sec) Capacity (cfs) |
| 1.0 | 61 | 0.0100 1.06 |
| Sheet Flow, A-B | ||
| Smooth surfaces | ||
| n= 0.011 P2= 4.04" | ||
1.0 61 Total, Increased to minimum Tc = 10.0 min
Subcatchment 7S: Ex. Study Area Road (Perv)