Full Gospel Tabernacle Church - 18080144-01_Pond Calculations

8.755.562.86%880738673293784.391.76%2.31%6690880744076881Total DA=8.75acImp. Area=5.5acI(A)= 0.629Rv= 0.616 inR(D)=1.0inTreatment Vol. Required=19,557cu. Ft.Treatment Vol. Provided =27,193cu. Ft. EDv/WQv= 27,193 cu. Ft.EDv/WQv Depth=1Ft.Release Time=52Hr.Avg. Release Q=0.145 cfsOrifice Area=0.052 cu. Ft.Orifice Dia.=0.258 Ft.Orifice Dia.=3.10 in.4560 1.77 1.49631.87 1.5870 2.09 1.80Required Forebay Vol (ft3)Average Depth (ft)SA/DA Table% ImperviousProvided Forebay Vol (ft3)Wet Detention Pond DesignWQ VolumeDrawdown TimeDrainage Area (ac)Impervious Area (ac)Impervious %Pond Suface Area (sf)Total Pond Volume (ft3)Average Depth (ft)Required SA RatioProvided SA RatioRequired SA (sf)Provided SA (sf)Required Pond Volume (ft3)
1ft1ft 1ftstepELEV AREA AVG. INCR. VOL.TOTAL VOLUME, CFstepELEV AREA AVG.INCR. VOL.TOTAL VOLUME, CFstepELEV AREA AVG. INCR. VOL.TOTAL VOLUME, CF198 1710 0 0 198 1404 0 0 198 3114 0 0120361167813714199 2362 2036 2036 199 1951 1678 1678 199 4313 3714 3714127351226715002200 3108 2735 4771 200 2583 2267 3945 200 5691 5002 8716135231293616459201 3938 3523 8294 201 3289 2936 6881 201 7227 6459 151750.563731 0.58017201.5 8807 3186 11480201.5 8807 4009 191830.594001 0.59400202.0 9992 4700 16180202.0 9992 4700 238831106121110612203.0 11232 10612 26792203.0 11232 10612 34495111881111881204.0 12530 11881 38673204.0 12530 11881 46376Main Pond ForebayWhole PondContour increment =  Contour increment =  Contour increment = 
WET POND
Concrete Weir Sizing
Drainage Area (A): 6.10 acre
I: 7.88 in/hr (10-yr) I: 10.1 in/hr (100-yr)
C: 0.60
Q10 = CIA = (6.10)(7.88)(0.60) = 28.84 cfs
Q100 = CIA = (7.88)(0.60)(0.00) = 36.97 cfs for weir sizing
Spillway Sizing: (10-yr)Bottom Width: 10 ft
Side Slope Ratio: 3 h : 1v
Flow Depth: 0.5 ft
Side Slope Width = 1.50
Surface Width = 13 ft
Area = 5.75 sf
Wetted Perimeter = 13.16 ft
Hydraulic Radius = 0.437
Roughness Coefficient, n: 0.030
Spillway Slope: 0.050 ft/ft
Velocity, V = 6.38 ft/sec
Flow, Q = 36.66 cf/sec
Conclusion:ADEQUATE
Spillway Sizing: (100-yr)Bottom Width: 10 ft
Side Slope Ratio: 3 h : 1v
Flow Depth: 0.6 ft
Side Slope Width = 1.80
Surface Width = 13.6 ft
Area = 7.08 sf
Wetted Perimeter = 13.79 ft
Hydraulic Radius = 0.513
Roughness Coefficient, n: 0.030
Spillway Slope: 0.050 ft/ft
Velocity, V = 7.10 ft/sec
Flow, Q = 50.29 cf/sec
Conclusion: ADEQUATE
By: JAJ
Project:Full Gospel Tabernacel
Project #: 18080144-01
Date: January 2, 2019
Full Gospel Tabernacle Pond Design