Response to Information Request - MCU12/0184

                                                                                        ~
                                                                                     Callaghan & Toth

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 (CatchmentsA, B, D, E, I, L,                 Commercial         80%                   1.68
     M, 0, 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)

             TOTAL                                                                          3.95ha



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

The compost storage area is to be a bunded, clay capped contained area where stormwater
infiltration will not occur. Therefore no leachate should runoff from the compost storage area
and as such it is not considered a catchment in the MUSIC model.


3.2.2 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 "Commercial" and the values in Table 3.7 and
Table 3.8 of the guidelines have been used in this model.


The Bioretention Swale provided for Catchment F will be 0.6m wide at the base, 3m wide
overall and 86m long and will be vegetated with effective nutrient removal plants. The filter
depth will be 0.5m and the extended detention depth will be O.Om. It has a 1 % grade flowing
into adjacent grassed areas. The size of this system has been designed in accordance with
Plan 03.


Grass Swales are provided for Catchments C, G, GA, H, T, U and W. The Swales will be
0.1 m wide at the base and 4m wide overall and will not be vegetated with effective nutrient
removal plants. The swales will be grassed and have 1 % grades and will flow into adjacent
grassed areas.




                                                                                                13
1209 Animal Husbandry   Top Forestry Rd, Ridgewood
                        -
                                                                                        SWQMP
April 2013