Other Change Decision Notice - Council Meeting Decision 132005 638 04 (As Published)

Document Set ID: 24377726

STORMWATER MANAGEMENT PLAN

Client: Noosa Shire Council Location: Doonan

 

 

Figure 5-1 Site Stormwater Quality Catchment Pian

The areas used to model the source nodes were extracted from the proposed development plan. The
nominated fraction impervious for each source node modelled in MUSIC was therefore:

e Road source node: 100% impervious

* Ground cover source node: 0% impervious

¢ Roof source node: 100% impervious

5.2 MUSIC Model Parameters

The MUSIC Modelling Guidelines - South East Queensland Version 1.0 (WBD, 2010) was used to source base
and storm flow concentrations and runoff generation. The model was calibrated using the Bureau of
Meteorology (BoM) data from Cooroy, 1973 - 1983 at a 6-minute time step in accordance with the W8D
(2010) guidelines. All source nodes were set up in accordance with this guideline, specifically for split
catchments. No routing of drainage links was applied as a conservative approach. This approach assumes
that the flow through the drainage system is instantaneous, which likely overestimates the pollutant load.

Refer to Table 5-2 for the split catchment source node characteristics for each sub-catchment. A copy of the
MUSIC model is found in Appendix B.

Table 5-2 MUSIC Source Node Characteristics

 

 

 

 

 

 

 

 

 

0.778 0.168 0.400 1.346
8 0.600 0.110 0.186 0.896
3 Project No: 244035
a covey M25-0042 Rpt Issue A

Version: 13, Version Date: 23/12/2025

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