5.2.-5.4. PCSR 09-13-2011 - Laserfiche WebLink

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T:\074211406\June11 CityApplSurface Water\ ER Landfill 06_2011 Type 1124-hr 25 yr Rainfall=4.70" Prepared by Wenck Associates, Inc. Printed .8/2/2011 HydroCAD® 9.10 s/n 02201 ©2010 HydroCAD Software Solutions LLC Page 35 Summary for Pond EX-26P: Existing Wetland west of RR trail, NW of S Expansion Inflow Area = .15.860 ac, 0.76% Impervious, ..Inflow Depth = 0.72" for 25 yr event Inflow = 6.52 cfs @ 12.30 hrs, Volume= 0.954 of Outflow = 1.25 cfs @ 13.74 hrs, Volume= 0.954 af, Atten= 81 %, Lag= 86.9 min Primary = 1.25 cfs @ 13.74 hrs, Volume= 0.954 of Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 0.00-96.00 hrs, dt= 0.02 hrs Starting Elev= 955.76' Surf.Area= 1.135 ac Storage= 0.562 of Peak Elev= 956.00' @ 13.74. hrs Surf.Area= 1.408 ac Storage= 0.864 of (0.303 of above start) Plug-Flow detention time= 767.7 min calculated for 0.392 of (41 % of inflow) Center-of-Mass det. time= 223.9 min (1,171.8 - 947.9 ) Volume Invert Avail.Storage Storage Description #1 954.77' 6.337 of Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store __ __ (feet) (acres) (acre-feet) (acre-feet) 954.77 0.000 0.000 0.000 956.00 1.410 0.867 0.867 958.00 4.060 5.470 6.337 Device Routing Invert Outlet Devices #1 Primary 955.76' 4.0' long x 20.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 #2 Secondary 957.87' 4.0' long x 20.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=1.25 cfs @ 13.74 hrs HW=956.00' (Free Discharge) L1=Broad-Crested Rectangular Weir (Weir Controls 1.25 cfs @ 1.31 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=955.76' (Free Discharge) 2=Broad-Crested Rectangular Weir (Controls 0.00 cfs)