MCU10/2083 Information Request Response 37 Gibson Rd Noosaville

     5.6   MUSIC CATCHMENT PARAMETERS

     Stormwater quality modelling has been undertaken for the proposed development using MUSIC 4.0 software
     program. MUSIC is widely accepted as the industry standard for WSUD modelling and is an excellent tool for
     comparing treatment train effectiveness. Input parameters for source nodes and treatment devices have been
     obtained from BCC's MUSIC modelling guidelines as well as the MUSIC Modelling guidelines for SEC! Version 1.
     The model layout is provided in Figure 2. Details on each catchment (Source Node) are detailed in Table 13.

                                             Table 13 - MUSIC Catchment Parameters
                                                                      Percentage
                          Catchment              Area (ha)                                 MUSIC Source Node
                                                                      Impervious
                                  Roof                 0.184               100                       Roof

                               Carparkl                0.089               100                       Road
                               Carpark 2               0.076               100                       Road



     5.7   MUSIC SOURCE NODE PARAMETERS

     The MUSIC source node parameters were taken from the BCC Guidelines for Pollutant Export Modelling in
     Brisbane - Version 7.


                               Table 14 - MUSIC Base and Storm Flow Concentration Parameters
                                               Total Suspended               Total Phosphorus                Total Nitrogen
                                              Solids (Log10 mg/L)                (log10 mg/L)                 (log10 mg/L)
            Land Use         Parameter
                                               Base            Storm         Base           Storm           Base       Storm
                                               Flow            Flow          Flow           Flow            Flow        Flow
              Urban            Mean             1.00           2.18          -0.97           -0.47          0.20        0.26
           Residential     Std Deviation       0.34            0.39          0.31            0.31           0.20       0.23


                                         Table 15 - MUSIC Runoff Generation Parameters
                                                Parameter                               Urban Residential
                                           Field Capacity (mm)                                200

                                    Infiltration Capacity Coefficient a                       211
                                    Infiltration Capacity Coefficient b                        5.0

                                         Rainfall Threshold (mm)                                1
                                           Soil Capacity (mm)                                 500
                                            Initial Storage (%)                                 10
                                         Daily Recharge Rate (%)                               28

                                         Daily Baseflow Rate (%)                               27




II    SITE BASED STORMWATER MANAGEMENT PLAN - Revision E          - Gibson Road, Noos                                          12