Stormwater Management Plan · MCU18/0019

SC7440 – Goodchap St, Noosa                                                                                                                2


                                                   TABLE OF CONTENTS
1.0      Introduction ............................................................................................................. 3
   1.1        Background ......................................................................................................... 3
   1.2        Scope .................................................................................................................. 3
   1.3        Existing Topography ............................................................................................ 3
   1.4        Proposed Development........................................................................................ 4
2.0      Water Cycle Management ....................................................................................... 5
   2.1        Background ......................................................................................................... 5
   2.2        Wastewater Minimisation ..................................................................................... 5
3.0      Water Quality Management .................................................................................... 5
   3.1        Background ......................................................................................................... 5
   3.2        Construction Phase.............................................................................................. 5
   3.3        Operational Phase ............................................................................................... 6
      3.3.1      Water Quality Objectives.................................................................................. 7
      3.3.2      Catchment Areas ............................................................................................. 7
      3.3.3      Pollutant Export Modelling ............................................................................... 8
      3.3.3.1        Rainfall Data................................................................................................ 9
      3.3.3.2        Treatment Nodes ......................................................................................... 9
      3.3.4      Effectiveness in Pollution Reduction................................................................. 9
4.0      Stormwater Quantity Management....................................................................... 10
   4.1        Background ....................................................................................................... 10
   4.2        Site Drainage Constraints and Opportunities ...................................................... 10
      4.2.1      Drainage Constraints ..................................................................................... 10
      4.2.2      Drainage Opportunities .................................................................................. 10
   4.3        Modelling Overview............................................................................................ 10
      4.3.1      Methodology .................................................................................................. 10
      4.3.2      Catchment Areas ........................................................................................... 11
      4.3.3      Roughness Coefficients ................................................................................. 11
      4.3.4      Storm Events ................................................................................................. 11
      4.3.5      Outlet Condition ............................................................................................. 12
      4.3.6      On-Site Detention .......................................................................................... 12
   4.4        Modelling Results .............................................................................................. 13
   4.5        Impacts on Existing Infrastructure ...................................................................... 14
5.0      Conclusions .......................................................................................................... 18
APPENDIX A – STORMWATER MANAGEMENT PLAN..................................................... 19
APPENDIX B – STORMWATER QUALITY MUSIC MODELLING ....................................... 20
APPENDIX C – XP-STORM MODELLING .......................................................................... 24
APPENDIX D – SPEL SPECIFICATIONS ........................................................................... 29