Analysis-Existing Conditions Prepared by Civil Core Consulting HydroCAD® 10.20-7a s/n 13637 © 2025 HydroCAD Software Solutions LLC
NOAA 24-hr D 10 YR-C Rainfall=5.26" Printed 8/29/2025
R-C Rainfall=5.26" Printed 8/29/2025 Page 49
Summary for Subcatchment 3S: DA-E4
Runoff = 5.80 cfs @ 12.32 hrs, Volume= 0.955 af, Depth= 1.91" Routed to Link 16L : Reduction
Runoff by SCS TR-20 method, UH=Delmarva, Split Pervious/Imperv. UI as Pervious, Time Span= 0.00-72.00 hrs, dt= NOAA 24-hr D 10 YR-C Rainfall=5.26"
Area (ac) CN Description
3.030 55 Woods, Good, HSG B
2.980 78 Row crops, straight row, Good, HSG B
6.010 66 Weighted Average
6.010 66 100.00% Pervious Area
Tc (min) Length (feet) Slope (ft/ft) Velocity (ft/sec) Capacity (cfs) Description
7.5 100 0.0040 0.22 Sheet Flow, Fallow n= 0.050 P2= 3.42" Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps
5.3 360 0.0160 1.14
2.1 62 0.0030 0.49 Shallow Concentrated Flow, Cultivated Straight Rows Kv= 9.0 fps
4.4 231 0.0300 0.87 Shallow Concentrated Flow, Woodland Kv= 5.0 fps
19.3 753 Total
Subcatchment 3S: DA-E4