Attach G- Engineering Report

                                                                                                                         ENG
                                                       Engineering Report & Stormwater Management Plan
                                               Date:          5/02/2016       Document No.:          15087-ENG-01.Docx

                                                By:              MRS           Revision No.:                A


     Music Model Parameters
The split catchment parameters used as the MUSIC Pollutant Export Parameters are shown
below in Table 5.3, and where derived from Table 3.8 of the MUSIC Modelling Guidelines
prepared by Water by Design (2010).

    FLOW            SURFACE
                                     TSS log10 VALUES        TSS log10 VALUES         TSS log10 VALUES
    TYPE              TYPE
                   Commercial          Mean     Std. Dev.      Mean       Std. Dev.     Mean          Std. Dev.

                       Roof            N/A         N/A         N/A          N/A          N/A            N/A
  Baseflow
                       Road            0.78        0.39        -0.60        0.50         0.32            0.3
 Parameters
                     Ground            0.78        0.39        -0.60        0.50         0.32            0.3
                       Roof            1.30        0.38        -0.89        0.34         0.37           0.34
 Stormflow
                       Road            2.43        0.38        -0.30        0.34         0.37           0.34
 Parameters
                     Ground            2.16        0.38        -0.39        0.34         0.37           0.34
      Table 5.3:             Source Node MUSIC Pollutant Export Parameters

The parameters used as the MUSIC Rainfall-Runoff Parameters are shown below in Table 5.4, and
were derived from Table 3.7 of the MUSIC Modelling Guidelines prepared by Water by Design
(2010).

                                    PARAMETER                                           COMMERCIAL
                               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
      Table 5.4:             MUSIC Rainfall-Runoff Parameters


Treatment parameters for the in ground proprietary systems have been provided by the
manufacturer. Refer to Appendix F for the Stormwater360 Operations and Maintenance
Manual.


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