H Swqmp · 132007.2398

                                                                                                 CALIBRE CONSULTING




The MUSIC model was setup generally in accordance with Water by Design MUSIC Modelling Guidelines (2010). The
subsequent sections discuss the model configurations adopted for the analysis.

 Developed Site Only No Mitigations.
 Model name: B14188.W_Umitigated.

 Developed Mitigated (with mitigation measures & external catchment).
 Model name: B14158.W_Final Strategy Mitigated.



4.4.1 METEOROLOGICAL DATA

Six minute pluviographic data was sourced from the Bureau of Meteorology (BOM) for Cooroy Composite (Station No.
40059). In accordance with Table 3.1 from MUSIC Modelling Guidelines (2010), the 10 year period from 1st January
1973 to 31st December 1983 has been adopted for the rainfall duration. The mean annual rainfall for this period is
1,600mm. The mean annual evapotranspiration for the modelled period is 1,629mm.

4.4.2 SOURCE NODES

Source nodes are sub-catchments that are defined for MUSIC modelling purposes. The site was divided into sub-
catchments as shown in Drawing No. B14158.W-SK05 in Appendix C.

The split catchment approach has been used to set up all source nodes in MUSIC. The MUSIC Modelling Guidelines
(2010) have been used to configure three types of surfaces, Roof, Road and Ground, to be modelled for each sub-
catchment. All sub-catchments within the model extent were assigned either Urban Residential or Commercial
Residential dependent on land use. Refer to Appendix B for MUSIC node configurations for the site. Split sub-catchment
node areas were calculated based on Concept Master Plan presented in Appendix A.

Rainfall runoff parameters for all nodes were assigned as residential land-use, in accordance with Table 3.7 of the
MUSIC Modelling Guidelines (2010). Pollutant export properties for source nodes have been configured according to the
industrial land use category in accordance with Table 3.8 of the MUSIC Modelling Guidelines (2010).

Stochastic generation estimation and serial autocorrelation set to zero has also been adopted.




B14158.W-01A | COOROY RETIREMENT COMMUNITY| PALM LAKE RESORTS                                                        |7