H - Revised Integrated Water Management Plan by Cardno (inc MUSIC file) (13.09.19)

                                                                                              Integrated Water Management Plan
                                                                                      Noosa Marketplace : 2-20 HOFMANN DRIVE




Table 6-1       Rainwater Tanks MUSIC Details
 Parameter                                    Tank 1           Tank 2         Tank 3
 Volume below overflow pipe (kL)                50                 50           10
 Depth above overflow (m)                       0.2                0.2          0.2
 Surface Area (sq m)                            10                 5             5
 Initial Volume (kL)                            10                 10            1
 Overflow pipe Diameter (mm)                    90                 90           90
 Max Drawdown Height (m)                        1                  1             1
 Annual Demand (kL/yr)                          766                766          109
 Distribution                              Daily Demand      Daily Demand   Daily Demand



6.2.2       MUSIC Model
A MUSIC (Ver. 6.3) model was set up to determine the efficiency of the stormwater quality treatment train
proposed for the development. The meteorological data adopted for the site was from the Cooroy Composite
weather station as recommended in the MUSIC Modelling Guidelines – Version 1.0 2010 (Water By Design,
2010), for the 11 year period from 01/01/1973 through to 31/12/1983.
The MUSIC source node characteristics were based on the values for commercial developments, as outlined
in the MUSIC Modelling Guidelines (Water By Design, 2010). The adopted source node characteristics are
summarised in Table 6-2 and Table 6-3 . The MUSIC model layout is shown in Figure 6-2 with catchments
shown in Figure 6-3.
                Rainfall Runoff Parameters for Commercial Source Nodes

 Parameter                              Value

 Rainfall threshold (mm)                1

 Soil storage capacity (mm)             18

 Initial storage (% capacity)           10
 Field capacity (mm)                    80
 Infiltration capacity coefficient a    243
 Infiltration capacity exponent b       0.6
 Initial depth (mm)                     50
 Daily recharge rate (%)                0
 Daily baseflow rate (%)                31
 Daily deep seepage rate (%)            0

                Pollutant Export Parameters for Commercial Source Nodes

 Parameter      Surface Type        TSS mg/L         TP mg/L   TN mg/L
                Roof                0                0         0
 Baseflow
                Roads               0.78             -0.6      0.32
                Roof                1.30             -0.89     0.37
 Stormflow
                Roads               2.43             -0.30     0.37




V190428 | 10 September 2019 | Commercial in Confidence                                                                     18