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16-001014-01A (Swmp)
Attached to the e-mail Operational Works Application OPW16/0203 - 3 of 4.
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Catchment B - Existing Rational Method Calcs
File: H:\B14\150-199\B14158.W\01 Final Layout Op Works\SW_Quantity\[B14158.W_Rational Method Calculations.xlsx]Existing_B
Date: 26/08/2016
Job: B14158.W
By: CM
Locality: NSC Plateau
IFD Ref: IFD_NSC Plateau
IFD Source: Derived from Noosa Shire Council Rainfall Intensity Curves Tinbeerwah to Black Mountain (Plateau) STD. DRG. 9232 (1991)Bureau of Meteorology Chart Noosa Heads (1987)
Time of Concentration Calculations
Av. Pipe Wetted Roughness
Velocity Wetted Area Hydraulic Sub Total
Reference Equation Type / Method Area (ha) Length (m) Slope Diameter Perimeter (Mannings/H tc (min)
(m/s) (m2) Radius R (mins)
(%) (mm) (m) ortons)
4.06.6 QUDM Overland Sheet Flow - Friends Equation 16.08 200 0.5 0.045 32
4.06.8 QUDM Concentrated Overland / Channel Flow 340 1.5 4 36
Adopted tc 36
C10 VALUE
Enter Fraction Impervious Development Category fi 1I10 (mm/hr) C10
Table 5.04.2 QUDM 0.08 70 0.72
Adopted C10 0.72
Flow Calculations (QUDM 4.03.1)
tc (min) 36
tc
ARI Cy Iy A (ha) Q (m3/s)
1 0.57 52 16.08 1.32
2 0.61 66 16.08 1.80
5 0.68 84 16.08 2.55
10 0.72 93 16.08 2.96
20 0.75 110 16.08 3.69
50 0.82 131 16.08 4.82
100 0.86 138 16.08 5.27
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