RFI - Attachment 7 - Updated SWMP

3.2.2.      MUSIC Model
An assessment of stormwater runoff quality from the proposed (developed) conditions has been
undertaken using the Model for Urban Stormwater Improvement Conceptualisation (MUSIC) – Version 6.3,
released in 2018.

Climate data for the catchment was sourced from the MUSIC model database. The rainfall and evaporation
data template for this site has been based on data from COOROY (40059) from 1/01/1973-31/12/1983 with
six (6) minute rainfall duration.

Table 3-2: Industrial (Split Source Nodes) - Pollutant Export Parameters

                                       Total Suspended Solids              Total Phosphorous       Total Nitrogen
                                             (Log10 mg/L)                     (Log10mg/L)           (Log10mg/L)
  Land Use         Parameter
                                      Storm                                Storm                Storm
                                                     Base Flow                      Base Flow            Base Flow
                                       Flow                                 Flow                 Flow

                  Mean                  1.92             0.78              -0.59      -1.11     0.25        0.14
 Ground
                  Std Deviation         0.44             0.45              0.36       0.48      0.32        0.20

                  Mean                  2.43             0.78              -0.30      -1.11     0.25        0.14
 Road
                  Std Deviation         0.44             0.45              0.36       0.48      0.32        0.20

                  Mean                  1.30              N/A              -0.89       N/A      0.25        N/A
 Roof
                  Std Deviation         0.44              N/A              0.36        N/A      0.32        N/A




Table 3-3: MUSIC Runoff Generation Parameters

 Parameter                                                                         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 (%)                                                                    0
 Daily Drainage (%)                                                                    31
 Daily Deep Seepage Rate (%)                                                           0




21-0211SMP01V1 | Stormwater Management Plan | Good Shepherd Lutheran College Arts Centre                       Page 10