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Site Based Stormwater Managment Plan
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Log in to see the plans as drawnRational Method Peak Flow Calculations Job No: 20169 MORGAN CONSULTING Job Type: Proposed Townhouse Development ENGINEERS PTY LTD Address: 99, 101 & 105 Eumundi Noosa Road 1 GREAT GEORGE STREET Council: Noosa PADDINGTON QLD 4064 IFD Data: 26.4125 (S),153.0375 (E) Minor Storm: Q10 Designed: DY 1 I10 74mm/hr Major Storm: Q100 Checked: HM Post-Development A Post-Development B Post-Development C Time of Concentration Standard Inlet Time Standard Inlet Time Standard Inlet Time Standard Inlet Time 5 mins Standard Inlet Time 5 mins Standard Inlet Time 5 mins Pipe Flow m Pipe Flow m Pipe Flow m Flow distance 46 Flow distance 90 Flow distance Fall of channel m Fall of channel m Fall of channel m Flow Velocity 2.5 % Flow Velocity 2.5 % Flow Velocity 2.5 % total 0.3 mins total 0.6 mins total 0.0 mins Concentrated Overland Flow Concentrated Overland Flow Concentrated Overland Flow Flow distance m Flow distance m Flow distance m velocity 1.5 m/s velocity 1.5 m/s velocity 1.5 m/s mins 0.0 mins mins 0.0 mins mins 0.0 mins Surface type multiplier 3.0 Surface type multiplier 3.0 Surface type multiplier 3.0 total 0.0 mins total 0.0 mins total 0.0 mins Total tc 5.3 mins Total tc 5.6 mins Total tc 5.0 mins Runoff Volume Calculations Name Area (ha) tc fi C10 Name Area (ha) tc fi C10 Name Area (ha) tc fi C10 0.376 0.70 0.84 0.4480 0.64 0.83 0.0440 1 0.90 Total 0.376 5.3 0.84 Total 0.448 5.6 0.83 Total 0.044 5.0 0.90 Frequency Frequency Frequency ARI Cy Iy Qy ARI Cy Iy Qy ARI Cy Iy Qy Factor A (Ha) Factor A (Ha) Factor A (Ha) (years) (Fy*C10) (mm/h) (m3/s) (years) (Fy*C10) (mm/h) (m3/s) (years) (Fy*C10) (mm/h) (m3/s) (Fy) (Fy) (Fy) 3 mth 0.043 3 mth 0.050 3 mth 0.005 1 0.800 0.672 123 0.376 0.086 1 0.800 0.662 121 0.448 0.100 1 0.800 0.721 124 0.044 0.011 2 0.850 0.714 138 0.376 0.103 2 0.850 0.704 137 0.448 0.120 2 0.850 0.766 140 0.044 0.013 5 0.950 0.798 189 0.376 0.157 5 0.950 0.787 187 0.448 0.183 5 0.950 0.856 191 0.044 0.020 10 1.000 0.840 222 0.376 0.195 10 1.000 0.828 220 0.448 0.226 10 1.000 0.901 225 0.044 0.025 20 1.050 0.882 254 0.376 0.234 20 1.050 0.869 251 0.448 0.271 20 1.050 0.946 257 0.044 0.030 50 1.150 0.966 295 0.376 0.298 50 1.150 0.952 291 0.448 0.345 50 1.150 1.000 299 0.044 0.037 100 1.200 1.000 327 0.376 0.341 100 1.200 0.994 322 0.448 0.398 100 1.200 1.000 331 0.044 0.040 Page 1 of 1 10/08/2021
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