2160 IWMP Report_Jan2022

PRE DEVELOPMENT                 noosa 100-Year Duration=6 min, Inten=295.9 mm/hr, Cf=1.20
Prepared by HP Inc.                                                            Printed 20/01/2022
HydroCAD® 10.00-26 s/n 05328 © 2020 HydroCAD Software Solutions LLC                        Page 5

                        Time span=0.00-3.00 hrs, dt=0.01 hrs, 301 points
                        Runoff by Rational method, Rise/Fall=1.0/1.7 xTc
               Reach routing by Stor-Ind method - Pond routing by Stor-Ind method

Subcatchment 1S: Existing Equivalent Runoff Area=586.0 m² 0.00% Impervious Runoff Depth=34 mm
                               Tc=6.0 min Frequency Adjusted C=0.84 Runoff=0.04052 m³/s 0.020 Ml

Subcatchment 2S: Existing          Runoff Area=2,000.0 m² 100.00% Impervious Runoff Depth=40 mm
                                                  Tc=6.0 min C=1.00 Runoff=0.16463 m³/s 0.080 Ml

Reach 4R: Creek                                                        Inflow=0.20514 m³/s 0.100 Ml
                                                                      Outflow=0.20514 m³/s 0.100 Ml

        Total Runoff Area = 0.2586 ha Runoff Volume = 0.100 Ml Average Runoff Depth = 39 mm
                                    22.66% Pervious = 0.0586 ha 77.34% Impervious = 0.2000 ha