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Appendix D_Engineering Report
Attached to the e-mail MCU15/0109 IDAS Forms, Planning Report & Engineering Report - Links Drive Noosa Heads.
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Rational Method Peak Flow Calculations
Job No: 15128 MORGAN CONSULTING
Job Type: Proposed Residential Development ENGINEERS PTY LTD
Address: Precinct E2, Noosa Springs, Noosa Heads 1 GREAT GEORGE STREET
Council: Noosa Council PADDINGTON QLD 4064
IFD Data: Noosa Minor Storm: Q10 Designed: RP
1
I10 72mm/hr Major Storm: Q100 Checked: HM
Resort Drive Road Catchment
Time of Concentration
Standard Inlet Time Standard Inlet Time
Standard Inlet Time 5 mins QUDM 2007 4.06 Standard Inlet Time 0 mins QUDM 2007 4.06
Sheet Flow (Friends Equation) QUDM 2007 - Table 4.06.3 Sheet Flow (Friends Equation) QUDM 2007 - Table 4.06.3
Sheet flow length (L) 0 m Sheet flow length (L) m
roughness (n) 0 short grass roughness (n) short grass
Fall of NSL 0 m Fall of NSL m
Slope of Surface (S) % Slope of Surface (S) %
total 0.0 mins total 0.0 mins
Pipe Flow Pipe Flow
Flow distance 85 m Flow distance 0 m
velocity 2 m/s Fall of channel m
mins 0.7 mins QUDM 2007 - Figure 4.09 Flow Velocity 0 m/s
Surface type multiplier 1.0 total #DIV/0! mins
total 0.7 mins
Total tc 5.7 mins Total tc #DIV/0! mins
Runoff Volume Calculations
Name Area (ha) tc fi C10 Name Area (ha) tc fi C10
0.3397 0.55 0.79 0 0 0.00
Total 0.340 5.7 0.79 Total 0.000 #DIV/0! #####
Frequency Frequency
ARI Cy Iy Qy ARI Cy Iy Qy
Factor A (Ha) Factor A (Ha)
(years) (Fy*C10) (mm/h) (m3/s) (years) (Fy*C10) (mm/h) (m3/s)
(Fy) (Fy)
3 mth 0.037 3 mth #DIV/0!
1 0.800 0.633 124 0.340 0.074 1 0.800 #DIV/0! #DIV/0! 0.000 #DIV/0!
2 0.850 0.673 157 0.340 0.099 2 0.850 #DIV/0! #DIV/0! 0.000 #DIV/0!
5 0.950 0.752 193 0.340 0.137 5 0.950 #DIV/0! #DIV/0! 0.000 #DIV/0!
10 1.000 0.791 214 0.340 0.160 10 1.000 #DIV/0! #DIV/0! 0.000 #DIV/0!
20 1.050 0.831 242 0.340 0.190 20 1.050 #DIV/0! #DIV/0! 0.000 #DIV/0!
50 1.150 0.910 280 0.340 0.240 50 1.150 #DIV/0! #DIV/0! 0.000 #DIV/0!
100 1.200 0.950 308 0.340 0.276 100 1.200 #DIV/0! #DIV/0! 0.000 #DIV/0!
Page 1 of 1 9/11/2015
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