Attachment 4 - Stormwater Management Plan by O2 · MCU13/0251

Table 4– MUSIC Rainfall Runoff Parameters

Parameter                                                                             Value (Commercial)

Rainfall Threshold (mm)                                                                       1

Soil Capacity (mm)                                                                           18

Initial Storage (%)                                                                          10

Field Capacity                                                                               80

Infiltration Capacity Coefficient a                                                          243

Infiltration Capacity Coefficient b                                                          0.6

Initial Depth (mm)                                                                           50

Daily Recharge Rate (%)                                                                       0

Daily Baseflow Rate (%)                                                                      31

Deep Storage (%)                                                                              0


5.6.          Pollutant Export Parameters
The pollutant export parameters for the site were determined from the Water by Design MUSIC Modelling
Guidelines and are shown below in Table 5.
Table 5– MUSIC Pollutant Export Parameters

                                      Log10 TSS (mg/L)          Log10 TP (mg/L)                   Log10 TN (mg/L)
 Land Use
 (Commercial)
                              Base Flow        Storm Flow   Base Flow    Storm Flow       Base Flow        Storm Flow

               Mean              0.78              2.43       -0.60         -0.30           0.32              0.37
   Road
               Std Dev           0.39              0.38       0.50           0.34           0.30              0.34

               Mean                   -            1.30         -           -0.89             -               0.37
    Roof
               Std Dev                -            0.38         -            0.34             -               0.34

               Mean              0.78              2.16       -0.6          -0.39           0.32              0.37
  Ground
   Level
               Std Dev           0.39              0.38        0.5           0.34           0.30              0.34


5.7.          Catchments
To analyse the proposed development in MUSIC, the site was split into various surface types:

          Carpark,
          Road,
          Roof, and
          Commercial Ground Level.
STORMWATER MANAGEMENT PLAN – PEREGIAN VILLAGE MARKET                                                            Page 8

Scanlon Property Group
R002616