1209 SWQMP Report_3 2013

                                                                                      Callaghan & Toth

3.2      MUSIC Model
3.2.1 Source Nodes

Catchment areas of source nodes within the proposed development have been identified as
sub-catchments such as roofs, carparks, roads and verge areas. MUSIC allows for the
characteristics of these source nodes to be amended to ensure that accurate pollution
generation and hydraulic characteristics are used to generate stormwater runoff within the
model. Table 3.1 below details the sub-catchments used in the MUSIC model, land use,
percent imperviousness and area of each sub-catchment. The MUSIC Modelling Guidelines
for South-East Queensland – Version 1 December 2010 have been used to set level of
imperviousness. The areas around the sheds have been related to a “Commercial” land use
and pollutant export parameters detailed in the Guidelines for this land use have been used
for each node. The composting areas have been related to an “Agricultural” land use.
Figure 3.1 shows the MUSIC model.


TABLE 3.1         MUSIC CATCHMENT AREAS (DEVELOPED)

             Catchment                               Land Use          Music Impervious      Area (ha)

  Shed Roof Area – To Rainwater
             Tanks                                   Commercial 100%                           1.39
             (Sheds 1 - 8)

 Gravel Roads and Carparks – to
Buffers (Catchments A, B, D, E, I, L,                Commercial 8             0%               1.68
    M, O, P, Q, R, S, V, W1, X)

 Grasses Areas, Gravel Roads – to
Swales (Catchments C, G, GA, H, T,                   Commercial            80 - 95%            0.58
             U, W)

    Gravel Road and Carpark to
                                                     Commercial              80% 0                 .16
 Bioretention Swale (Catchment F)

    Gravel Road and Carpark to
 Bioretention Basin (Catchment K &                   Commercial              80% 0                 .14
                 N)

Large composting poultry litter area                 Agricultural            90%               0.34

Small composting poultry litter area                 Agricultural            90%               0.15

             TOTAL                                                                            4.44ha


The Poultry sheds are not considered MUSIC catchment areas as the sheds will be
designed to ensure no nutrient rich runoff drains from the sheds.

The poultry litter composting area is to be a bunded and clay capped. The composting
poultry litter mounds will be covered and turned by machine while under tarps refer to
Appendix 4 composting photos 3 and 4. The remaining bare areas of the composite storage

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1209 Animal Husbandry – Top Forestry Rd, Ridgewood                                   SWQMP_REV_3
September 2013