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

Home Browse Search

T:10742\1406\June11 CityApp\Surface Water\ ER Landfill 06_2011 Type ll 24-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 31 Summary for Pond 26P: Wetland west of RR trail, NW of S Expansion Inflow Area = 53.162 ac, 0.23% Impervious, Inflow Depth > 0.69" for 25 yr event Inflow = 6.52 cfs @ 12.30 hrs, Volume= 3.062 of Outflow = 2.17 cfs @ 19.43 hrs, Volume= 3.055 af, Atten= 67%, Lag= 427.9 min Primary = 1.09 cfs @ 19.43 hrs, Volume= 1.528 of Secondary = 1.09 cfs @ 19.43 hrs, Volume= 1.528 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= 955.98' @ 19.43 hrs Surf.Area= 1.383 ac Storage= 0.835 of (0.273 of above start) Plug-Flow detention time= 483.7 min calculated for 2.494 of (81 % of inflow) Center-of--Mass det. time= 105.5 min (1,480.6 - 1,375.1 ) 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 south 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 955.76' 4.0' tong x 20.0' breadth north 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=1.08 cfs @ 19.43 hrs HW=955.98' (Free Discharge) 'L1=south weir (Weir Controls 1.08 cfs @ 1.25 fps) Secondary OutFlow Max=1.08 cfs @ 19.43 hrs HW=955.98' (Free Discharge) 2=north weir (Weir Controls 1.08 cfs @ 1.25 fps)