5179IWMP_Rev3

                                                                                       Callaghan & Toth

TABLE 4.1           MUSIC CATCHMENT AREAS (DEVELOPED)

                Catchment                        Land Use      Music Impervious              Area (ha)

                Catchment A                      Residential           50%                      0.078
           Lots 12 + road reserve

                Catchment B                      Residential           50%                      0.461
Existing lots and Lots 8, 9 & new lots 7, 10,
           & 11 plus road reserve

                Catchment C                      Residential           50%                      0.146
        Lots 5 & 6 plus road reserve

                Catchment D                      Residential   20% for yard and road            0.068
                                                                      reserve
 Lot 4 plus road reserve with roof water to
                    BB2                                            100% for roof

                Catchment E                      Residential           50%                      0.146
        Lots 2 & 3 plus road reserve

                Catchment G                      Residential   20% for yard and road            0.072
                                                                      reserve
Lot 15 and a portion of lot 14 with roof water
         from lot 15 going to BB4                                  100% for roof

                Catchment H                      Residential           65%                      0.179
   Lot 13 and a portion of lot 14 plus road
                  reserve

            TOTAL                                                                              1.15ha



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 96m2 in total area (at the extended detention depth) with a filter area of
             68m2.
          c. Filter layer depth of 0.4m and an extended detention depth of 0.3m.


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2035 2 Pearsons Road IWMP – Revision 3                                                 April 2021