Stormwater Treatment & Water Quality Management Plan_April2014

                                                                            Callaghan & Toth

TABLE 4.1         MUSIC CATCHMENT AREAS (DEVELOPED)

             Catchment                    Land Use        Music Impervious      Area (ha)

                Lot 1 – 4                Urban – Roof            100%              0.08

           Yard – Lot 1 to 4             Urban – Yard            20%               0.167

   Road Widening + Verge (Lake           Urban – Road             60%              0.051
         MacDonald Dr)

               Lot 5 – 16                Urban – Roof            100%               0.3

          Yard – Lot 5 to 16             Urban – Yard            20%               0.717

 Road Widening + Verge (Masonry          Urban – Road            60%               0.185
             Street)

              Lot 26 to 28               Urban – Roof            100%              0.075

          Yard – Lot 26 to 28            Urban – Yard            20%               0.126

      Lot 17 to 25 and 29 to 32          Urban – Roof            100%              0.40

  Yard – Lot 17 to 25, and 29 to32       Urban – Yard            20%               0.61

     Roadway (off Blue Wren Ct)          Urban – Road             60%              0.40

               Lot 33 - 57               Urban – Roof            100%              0.625

          Yard – Lot 33 to 57            Urban – Yard            20%               1.065

     Roadway (off Blue Wren Pl)          Urban – Road             60%              0.461

             TOTAL                                                               5.262ha


4.2.2 Treatment Nodes

The “MUSIC Modelling Guidelines for South East Queensland” Version 1 prepared by Water by
Design and dated December 2010 has been used to set the rainfall runoff parameters and
pollutant export parameters for the site.

The land use type used for this model was “Urban” and the values in the guideline shown in
Table 3.7 and Table 3.8 of the guidelines have been used in this model.

Treatment nodes proposed for areas discharging into the eastern tributary (Stages 1, 2,
part of 3 and 5):
   1. Bioretention Basin 1 (already completed as part of Stage 1):
           a. Located in Passive Parkland adjacent to Lake MacDonald Drive.
           b. It is 47m2 in area with a filter area of 25m2.
           c. Filter layer depth of 0.5m and an extended detention depth of 0.3m.




55 Lake MacDonald Drive – Stage 1 to 5                                                    pg. 14