Appendix B - IWMP_2PearsonsRd_REV0

                                                                                  Callaghan & Toth

TABLE 4.1         MUSIC CATCHMENT AREAS (DEVELOPED)

               Catchment                  Land Use             Music Impervious       Area (ha)

              Roof – 18 lots        Urban Residential – Roof        100%                 0.45

              Yard – 18 lots        Urban Residential – Yard         20%                     0.7

        Road Reserve + Easement    Urban Residential – Road          60%                 0.29



           TOTAL                                                                        1.44ha



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 for areas discharging into the park:
   1. Bioretention Basin 1:
          a. Located in Parkland.
          b. It is 450m2 in total area with a filter area of 200m2.
          c. Filter layer depth of 0.4m and an extended detention depth of 0.2m.
          d. The size and depth of the systems have been designed in accordance with
             Water by Design Guidelines and a typical plan and section are shown in Figure
             4.2.


4.2.3 Rainfall Data

The meteorological data used for the MUSIC Model was the data for Cooroy from 01/01/73 –
31/12/83.

The mean Annual Rainfall for Cooroy                    1973 – 1983 = 1600mm

The MUSIC Modelling Guidelines for South East Queensland – Version 1 December 2010
details that Cooroy data for 1973 to 1983 should be used.




                                                                                                   13
2035 2 Pearsons Road IWMP                                                   September 2020