5179SQMP_2 PearsonsRd_Feb2021_Rev2_

                                                                                  Callaghan & Toth

TABLE 4.1          MUSIC CATCHMENT AREAS (DEVELOPED)

                Catchment                     Land Use         Music Impervious        Area (ha)

               Catchment A                    Residential            60%                  0.189
        Lots 11 to 12 + road reserve

               Catchment B                    Residential            60%                  0.488
      Existing lots + Lot5 8, 9 and 18

               Catchment C                    Residential            60%                  0.184
        Lots 13 & 14 + road reserve

               Catchment D                    Residential            60%                  0.185
               Lots 15 to 17

               Catchment E                    Residential            60%                  0.439
         Lots 1 to 5 + road reserve

               Catchment F                    Residential            60%                  0.281
  Lots 6, 7, part of 9, & 10 + road reserve



           TOTAL                                                                         1.77ha



4.2.2 Treatment Nodes

The “MUSIC Modelling Guidelines for South East Queensland” Version 1.0 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 Residential” and the values in the guideline
shown in Table 3.7 and Table 3.8 of the guidelines have been used in this model. Figure 4.1
shows the MUSIC Model layout for the site. Refer to IPWEAQ standard drawings WSUD 001 &
WSUD 003 (See Appendix B)

Treatment nodes proposed:
   1. Bioretention Basin (BB4):
          a. Located in Parkland.
          b. It is 150m2 in total area (at the extended detention depth) with a filter area of
             120m2.
          c. Filter layer depth of 0.4m and an extended detention depth of 0.15m.
          d. Submerged zone with carbon present to a depth of 0.15m.
          e. The size and depth of the systems have been designed in accordance with
             Water by Design Guidelines.
   2. Roadside Bio Pods (BB1, BB2, BB3)
          a. Located in road reserve
          b. Designed to have filter areas of 7.5m2, 25m2 and 40m2 respectively.

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2035 2 Pearsons Road IWMP – Revision 2                                        February 2021