Att 8 - SWMP

             In order to gauge the effectiveness of the stormwater quality treatment train and confirm
             sizing of the bioretention devices, a MUSIC V6 model was developed. The external
             catchment in Ernest Street was excluded from the model and calculations as this area is not
             being modified by the development and will not contribute flow to the proposed treatment
             systems.

             The MUSIC model was developed using the split-catchment approach document by Water
             by Design (2010) in the MUSIC Modelling Guidelines for South-East Queensland using a 10-
             year rainfall period for Noosa Shire based on a 6 minute time step. All source node
             parameters are consistent with the above guidelines. The MUSIC model layout is shown in
             Figure 2.2 and a summary of the source node properties for each of the site catchments is
             provided in Table 2.1.




             Figure 2.2 – MUSIC Model Layout

             The sizing of the treatment train components were adjusted in MUSIC until a solution which
             complies with the pollutant load reduction targets specified in the Noosa Shire Council
             Planning Scheme was achieved. The resulting pollutant loads are specified in Table 2.2 and
             resulting concept design parameters of the treatment train components are provided in Table
             2.3.




SWMP – 11-19 Hilton Tce Tewantin                                                                           6