Runoff = 0.21 cfs @ 12.19 hrs, Volume= 0.028 af, Depth=11.17" Routed to Link 18L : Study Area Road Undetained (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) Description
0.4 35 0.0322 1.52 Sheet Flow, A-B Smooth surfaces n= 0.011 P2= 4.04"
0.4 35 Total, Increased to minimum Tc = 10.0 min
Subcatchment 12S: Study Area Road Undetained (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 122 |
Runoff = 0.58 cfs @ 12.21 hrs, Volume= 0.074 af, Depth= 2.87"
Routed to Link 14L : Study Area West (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 |
|---|---|---|
| 0.310 | 39 | >75% Grass cover, Good, HSG A |
| 0.310 | 39 | 100.00% Pervious Area |
| Tc (min) | Length (feet) | Slope (ft/ft) Velocity (ft/sec) Capacity (cfs) |
| 2.7 | 48 | 0.0850 0.29 Sheet Flow, A-B Grass: Short n= 0.150 P2= 4.04" |
| 3.7 | 48 | Total Increased to minimum Te = 10.0 min |
2.7 48 Total, Increased to minimum Tc = 10.0 min
Subcatchment 14S: Study Area West Undetained