Stormwater Management Plan · MCU15/0122

                                                                                        15099 - SBSMP/3
                                                                                                 Page 20




6.2.3 Pollutant Export Modelling
Following the definition of water quality objectives for the site and an assessment of the
treatment options suitable for the development, the most appropriate treatment scheme for
the site was identified. The impact of the stormwater management strategy on the quality of
stormwater runoff discharged from the site has been assessed using the pollutant export model,
Model for Urban Stormwater Improvement Conceptualisation (MUSIC).

6.2.4 MUSIC Modelling Parameters
The MUSIC model was set up in accordance with the Water-By-Design ‘MUSIC Modelling
Guidelines for South East Queensland’ to the parameters listed in Table 6.6 and Table 6.7.

                                         Table 6.6 – MUSIC Parameters

                      Parameter                                Data Used

                     Rainfall Data          Rainfall Station 40059, COOROY 1973 to 1983

                  Modelling Timestep                           6 minutes

                        Routing                   No routing drain links were adopted




                        Table 6.7 – Catchment Runoff Generation Parameters

                                                                     Urban Commercial
                                  Parameter
                                                                        Catchment

                             Rainfall Threshold                                  1

                         Soil Storage Capacity (mm)                              18

                    Initial Storage Capacity (% capacity)                        10

                            Field Capacity (mm)                                  80

                     Infiltration Capacity Coefficient a                     243

                     Infiltration Capacity Coefficient b                     0.60

                             Initial Depth (mm)                                  50

                          Daily Recharge Rate (%)                                0

                           Daily Baseflow Rate (%)                               31

                        Daily Deep Seepage Rate (%)                              0




Site Based Stormwater Management Plan
Proposed Medical Development at Cnr Val Crescent & Goodchap Street, Noosaville