Summary for Subcatchment 2S: IMPERVIOUS
[49] Hint: Tc<2dt may require smaller dt
Runoff = 2.28 cfs @ 12.10 hrs, Volume= 0.172 af, Depth> 4.59"
Routed to Reach 3R : COMPOSITE
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 10 YEAR Rainfall=5.38"
Area (ac) CN Description
0.150 96 Gravel surface, HSG A
0.300 98 Paved parking, HSG A
0.450 97 Weighted Average
0.150 33.33% Pervious Area
0.300 66.67% Impervious Area
Tc (min) Length (feet) Slope (ft/ft) Velocity (ft/sec) Capacity (cfs) Description
1.4 180 0.0110 2.13 Shallow Concentrated Flow, Paved Kv= 20.3 fps
2.6 280 Total
1.2 100 0.0200 1.42 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.42"
Subcatchment 2S: IMPERVIOUS