MCU14/0056 - Attachment H -Economic Needs Assessment

                                                                                                                            ENG
                                                           Engineering Report & Stormwater Management Plan
                                                  Date:           16/06/2014      Document No.:         14012-ENG-01.Docx

                                                   By:               AvT           Revision No.:               B


        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
where 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




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