8. APP G. Engineering RFI Response

          Figure 6.2: Bio-Retention Basin Typical Cross-Section (courtesy of Healthy Waterways)


          MODELLING OF THE DEVELOPMENT SITE
          (MUSIC)
          Modelling of the site was undertaken using the ‘Model for Urban Stormwater Improvement
          Conceptualisation (MUSIC)’ as promoted by the Noosa Council and the South East Queensland
          Healthy Waterways Partnership. The development was modelled using the split catchment
          approach. An appropriate type of land use was applied to all surface types within the developed
          catchments; with individual treatment devices assigned the relevant modelling treatment
          parameters. Consequently, a treatment train was established for each catchment, ensuring that
          all water discharging from site adheres to the specified Water Quality Objectives.

          Meteorological data for input into MUSIC was obtained for the Cooroy Composite Station
          (station number 40059) from the Bureau of Meteorology. Six minute time step rainfall data was
          obtained for the climate period from 1/1/1973 to 31/12/1983. The catchment parameters of the
          MUSIC modelling are specified within the South East Queensland Healthy Waterways
          Partnerships’ Water by Design MUSIC Modelling Guidelines for South East Queensland Version
          1 (2010), and have been modelled as such.

          POLLUTANT SOURCE NODE DETAILS
          Tables 6.2 and 6.3 show the pollutant source node parameters input into the MUSIC model.
          These parameters have been utilised in accordance with the South East Queensland Healthy
          Waterways Partnerships’ Water by Design MUSIC Modelling Guidelines for South East
          Queensland Version 1 (2010).

          Table 6.2: Rainfall – Runoff Parameters
           Storage Capacity (mm/day)                       18
           Initial Storage (%)                             10
           Field Capacity (mm)                             80
           Initial Depth (mm)                              50
           Daily Recharge Rate (%)                          0
           Daily Baseflow Rate (%)                         31


                                                                                          Stormwater Management Plans
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