Inflow Area = 77,967 sf, 31.84% Impervious, Inflow Depth = 1.83" for 10 YR-C event
Inflow = 3.06 cfs @ 12.10 hrs, Volume= 11,893 cf
Outflow = 0.29 cfs @ 13.26 hrs, Volume= 11,894 cf, Atten= 91%, Lag= 69.6 min
Primary = 0.29 cfs @ 13.26 hrs, Volume= 11,894 cf
Routed to Pond 2P : Subsurface Infiltration Basin 1
Routing by Dyn-Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs / 3
Automatic Starting Elev= 91.55' Surf.Area= 1,500 sf Storage= 2,325 cf
Peak Elev= 94.67' @ 13.25 hrs Surf.Area= 1,500 sf Storage= 7,004 cf (4,679 cf above start)
Plug-Flow detention time= 378.3 min calculated for 9,568 cf (80% of inflow)
Center-of-Mass det. time= 180.7 min (955.7 - 775.0 )
Volume Invert Avail.Storage Storage Description
#1 90.00' 8,250 cf Custom Stage Data (Prismatic) Listed below (Recalc)
Elevation (feet) Surf.Area (sq-ft) Inc.Store (cubic-feet) Cum.Store (cubic-feet)
90.00 1,500 0 0
95.50 1,500 8,250 8,250
Device Routing Invert Outlet Devices
#1 Device 3 91.00' 2.5" Vert. Orifice C= 0.600 Limited to weir flow at low heads
#2 Device 3 95.00' 48.0" x 48.0" Horiz. Grate C= 0.600
#3 Primary 87.48' 12.0" Round Culvert L= 28.0' RCP, groove end projecting, Ke= 0.200 Inlet / Outlet Invert= 87.48' / 87.00' S= 0.0171 ' / Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 0.79 sf
Primary OutFlow Max=0.29 cfs @ 13.26 hrs HW=94.67' TW=91.58' (Dynamic Tailwater)
3=Culvert (Passes 0.29 cfs of 7.93 cfs potential flow)
1=Orifice (Orifice Controls 0.29 cfs @ 8.46 fps)
2=Grate ( Controls 0.00 cfs)