OCSCD NOAA 24-hr D 2 YEAR Rainfall=3.42" Prepared by Professional Design Services Printed 12/31/2025 HydroCAD® 10.20-6a s/n 02223 © 2024 HydroCAD Software Solutions LLC Page 13
Summary for Subcatchment 11S: BY-PASS IMPERVIOUS
Runoff = 0.24 cfs @ 12.09 hrs, Volume= Routed to Reach 10 : COMPOSITE 0.017 af, Depth> 2.92"
0.017 af, Depth> 2.92"
Runoff by SCS TR-20 method, UH=Delmarva, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs NOAA 24-hr D 2 YEAR Rainfall=3.42"
Area (ac) CN Description
0.070 98 Paved parking, HSG A
0.070 100.00% Impervious Area
Tc (min) Length (feet) Slope (ft/ft) Velocity (ft/sec)
Direct Entry,
Subcatchment 11S: BY-PASS IMPERVIOUS