B07056.W-01A Complete - Stormwater [As Published] · 132007.2398

Concept Stormwater Management Plan
RSL Care – Cooroy Retirement Village

                                 CONCEPT
                        STORMWATER MANAGEMENT PLAN
                                                                        FOR
             RSL CARE, COOROY RETIREMENT VILLAGE
                   TRADING POST RD, COOROY
                                              TABLE OF CONTENTS
1.0 INTRODUCTION ................................................................................................................. 1
2.0 SITE CHARACTERISTICS.................................................................................................. 2
     2.1 Location .......................................................................................................................................2
     2.2 Topography and Site Drainage....................................................................................................2
3.0 HYDROLOGICAL INVESTIGATION ................................................................................... 4
     3.1 DRAINS Model Setup ..................................................................................................................4
         3.1.1 DRAINS Input Data.......................................................................................................... 4
     3.2 Existing Catchment......................................................................................................................5
         3.2.1 Existing Catchment Characteristics ................................................................................. 5
     3.3 Developed Catchment Characteristics ........................................................................................5
         3.3.1 Developed Catchment Characteristics ............................................................................ 5
     3.4 Existing and Developed Catchment Results................................................................................6
4.0 FLOOD INVESTIGATION ................................................................................................... 8
5.0 DETENTION BASIN MODELLING...................................................................................... 9
     5.1 Concept Detention Basin Design.................................................................................................9
     5.2 Mitigated Scenario Results ........................................................................................................10
6.0 STORMWATER QUALITY ................................................................................................ 11
     6.1 Pollutants of Concern / Water Quality Objectives......................................................................11
         6.1.1 Regional Water Quality Guidelines................................................................................ 11
     6.2 Stormwater Quality Management Strategy................................................................................13
     6.3 MUSIC Modelling.......................................................................................................................14
         6.3.1 Meteorological Data....................................................................................................... 14
         6.3.2 Source Nodes ................................................................................................................ 15
         6.3.3 Drainage Links............................................................................................................... 15
         6.3.4 Treatment Nodes ........................................................................................................... 15
     6.4 MUSIC Modelling Results..........................................................................................................17
7.0 WATER BALANCE MODELLING ..................................................................................... 19
     7.1 Proposed Measures...................................................................................................................19
     7.2 Water Balance Methodology......................................................................................................19
         7.2.1 Rainfall Data .................................................................................................................. 19
         7.2.2 Roof Details ................................................................................................................... 20
         7.2.3 Usage ............................................................................................................................ 20
     7.3 Water Balance Results ..............................................................................................................20
         7.3.1 Existing & Developed Scenarios.................................................................................... 20
         7.3.2 Mitigated Scenario ......................................................................................................... 21
8.0 WATER SENSITIVE DESIGN CODE RESPONSE ........................................................... 22
9.0 CONCLUSIONS AND RECOMMENDATIONS.................................................................. 24
10.0 REFERENCES................................................................................................................ 25
11.0 APPENDICES ................................................................................................................. 25




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