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stormwater.mang.2004.pg11 47392-CLUTE - SELF STORAGE Type 11 24-hr Rainfall=4.90" Prepared by {enter your company name here} Page 4 HydroCAD®6 10 s/n 002373 © 1986-2002 Applied Microcomputer Systems 2/3/2004 Pond 2P: (new Pond) Inflow Area = 0.788 ac, Inflow Depth = 2.69" Inflow = 4.26 cfs @ 11.92 hrs, Volume= 0.177 of Outflow = 2.59 cfs @ 11.99 hrs, Volume= 0.177 af, Atten= 39%, Lag= 4.2 min Discarded = 2.59 cfs @ 11.99 hrs, Volume= 0.177 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 96.49' Surf.Area= 1,867 sf Storage= 922 cf Plug-Flow detention time= (not calculated: outflow precedes inflow) Storage and wetted areas determined by Prismatic sections Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 96.00 1,161 0 0 97.00 2,600 1,881 1,881 98.00 4,451 3,526 5,406 Discarded OutFlow Max=2.57 cfs @ 11.99 hrs HW=96.48' (Free Discharge) t-1=Exfiltration (Controls 2.57 cfs) # Routing Invert Outlet Devices 1 Discarded 0.00' 0.083300 fpm Exfiltration over entire Surface area Pond 3P: 4 DWS AND 117 LF INFILTRA. TRENCH Inflow Area = 0.600 ac, Inflow Depth = 4.28" Inflow = 4.55 cfs @ 11.90 hrs, Volume= 0.214 of Outflow = 1.91 cfs @ 12.00 hrs, Volume= 0.212 A Atten= 58%, Lag= 5.9 min Primary = 1.91 cfs @ 12.00 hrs, Volume= 0.212 of Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 95.59' Storage= 2,763 cf Plug-Flow detention time= 26.0 min calculated for 0.212 of(99% of inflow) Elevation Cum.Store (feet) (cubic-feet) 89.60 0 90.60 152 91.60 480 92.60 967 93.60 1,534 94.60 2,102 95.60 2,772 96.60 3,551 97.60 4,452 98.60 5,483