Attachment D amended SWMP

6.2.1.4 Catchment Split
Total land use to the bio-retention basin and the catchment breakdown is shown in the table below.
Table 11 - MUSIC Model Catchments

                                        Roof (ha)       Road (ha)         Landscape (ha)
                      Catchment
                                         100%FI          100%FI               0% FI
                     Site                0.1763           0.1647              0.0190

                     Bypass                  -            0.0140              0.0410


The proposed setback has resulted in an area of bypass however as shown below the basin is sized to
compensate for these flows.

6.2.1.5 Proposed Treatment Train
A treatment train consisting a rainwater tank and a conventional bioretention system, is proposed for the
development. The proposed bioretention system is proposed to be located within the proposed detention basin.
The figure below summarises the proposed treatment train for the development.




                              Figure 2 – MUSIC Model Layout (Bio-Retention)

6.2.1.6 Proposed Treatment Devices
Rainwater Harvesting Tanks
The following table summarises the individual parameters used in the MUSIC model for the proposed rainwater
tanks.
Table 12 - Rainwater Tanks
                               Properties                    Rainwater Tank
                               Volume (kL)                           5
                               Surface Area (m²)                    3.2
                               Initial Volume (kL)                   1
                               Daily Demand (kL/day)                 2




 BR210522_SBSMP_Rev5.docx                                                                              Page 15 of 25