MCU14/0106 Appendix E - Engineering Report

Noosa Civic
Stormwater Management Plan



Table 3-7         Water Re-use and Treatment MUSIC Catchment Parameters

         MUSIC Node                   Description                      Area                Land Use               Total
                                                                       (ha)                                     Impervious
                                                                                                                   (%)
     Car Park and Road         All car park areas and new              2.344              Commercial               75%
                                          roads
          Green Areas              All landscape areas                 0.877                                        5%
               Roof                   All roof areas                   2.739                                       100%
 Walkways and Hardstand          All walking paths and                 1.026                                       80%
                                 general public areas


The parameters of the bio-retention system adopted and required treatment area for the analysis are listed in
Table 3-8.
Table 3-8         Water Re-use and Treatment Basins Details

 Design Parameters                                             Value
 Filter Area (m2)                                                700
 Filter Depth (m)                                                0.4
 Extended Detention Depth (m)                                    0.2
 Saturated hydraulic conductivity (mm/hr)                        200
 TN content of filter media (mg/kg)                              400
 Orthophosphate content of filter media (mg/kg)                  50


The parameters of the rainwater tank adopted for the analysis are listed in Table 3-9.
Table 3-9         Water Re-use and Treatment Rainwater Tank Details

                                                   Design Parameters
 Volume below overflow pipe (kL)                                                        300
 Depth above overflow (m)                                                               0.2
 Surface Area (m2)                                                     89.9 (based off a 10.7m diameter tank)


Table 3-10 below presents the effectiveness of using a rainwater tank on site and its reductions of pollutants
from the roof areas.
Table 3-10         Rainwater Tank Effectiveness

  Rainwater Tank Effectiveness                           Value
  Flow In (ML/year)                                      31.50
  Flow Out (ML/year)                                     19.88
  Reuse Supplied (ML/year)                               11.65
  Reuse Requested (ML/year)                              34.50
  % Reuse Demand Met                                     33.76
  % Total Suspended Solids Reduction                     39.90
  % Total Phosphorous Reduction                          37.46
  % Total Nitrogen Reduction                             37.81




QIC Noosa Civic Pty Ltd                                  Version 1                                              November 2014
Appendix D - SMP.docx                                                                                                 Page 9