Stormwater Management Plan

65-67 Elanda Street, Sunshine Beach
Site Based Stormwater Management Plan
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Table of Contents
1. EXECUTIVE SUMMARY                                                                     4
1.1         Introduction                                                                 5
1.2         Objectives                                                                   5
1.3         Development Details                                                          6
1.4         Site Characteristics                                                         6
1.4.1       External Catchment Analyses                                                  6
1.4.2       Existing Land Use and Stormwater Discharge                                   6
1.4.3       Proposed Land Use and Stormwater Discharge                                   7
2. LAWFUL POINT OF DISCHARGE                                                             8
3. HYDROLOGICAL MODELLING AND ANALYSES                                                   9
3.1 Modelling Parameters and Strategy                                                    9
3.2 Modelling of Peak Discharge and Impact Assessment                                 10
3.3 Modelling of Detention Devices                                                    15
3.4 Stormwater Quality                                                                19
4. CONCLUSIONS & RECOMMENDATIONS                                                      20
4.1 Proposed Stormwater Management Plan                                               20
4.2 Recommendations                                                                   20
4.2.1 Construction Phase                                                              20
4.2.2 Pre-Construction                                                                20
4.2.3 During Construction                                                             20
4.2.4 Post Construction                                                               21
4.2.5 Operational Phase                                                               21
5. REFERENCES                                                                         22


Appendices
A           ~       Survey Plan & Architectural Plans
B           ~       Rainfall Intensity and Coefficients from BOM
C           ~       Runoff Hydrographs from Storm Events with Multiple Durations
D           ~       Rational Method Calculation
E           ~       Concept Stormwater Drainage Layout Plan
F           ~       Detention Tanks Flow Hydrographs and Water Levels




File Name:               WCD-22936 – 65-67 Elanda_SWMP.docx
Revision:                C                                                           3