2014022_71_SeaviewTce_SWMP-revC_full · OPW16/0021

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Contents!
EXECUTIVE!SUMMARY!                                I!

1! INTRODUCTION!                                  1!
1.1! SITE!CHARACTERISTICS!                        1!
1.2! PREVIOUS!INVESTIGATIONS!                     2!

2! STORMWATER!QUALITY!                            5!
2.1! DESIGN!OBJECTIVES!                           5!
2.2! STORMWATER!QUALITY!TREATMENT!                5!
2.2.1! STRATEGY!                                  5!
2.3! MODELLING!APPROACH!                          7!
2.3.1! PHILOSOPHY!                                7!
2.3.2! MUSIC!SETUP!                               7!
2.3.3! CATCHMENT!AREAS!                           8!
2.3.4! MUSIC!MODEL!LAYOUT!                        9!
2.4! TREATMENT!MEASURES!                         10!
2.4.1! RAINWATER!TANKS!                          10!
2.4.2! BIORETENTION!SYSTEM!                      11!
2.4.3! SEDIMENT!FOREBAYS!                        11!
2.5! RESULTS!                                    13!

3! STORMWATER!QUANTITY!                          14!
3.1!   SITE!DRAINAGE!AND!CATCHMENT!DEFINITION!   14!
3.2!   EXISTING!SCENARIO!                        15!
3.3!   RATIONAL!METHOD!CALIBRATION!              16!
3.4!   DEVELOPED!SCENARIO!                       16!
3.5!   MITIGATED!SCENARIO!                       18!

4! DETAILED!DESIGN!DOCUMENTATION!                22!

5! BIORETENTION!MAINTENANCE!MANUAL!              23!

6! WATER!QUALITY!MONITORING!                     24!
6.1! CONSTRUCTION!                               24!
6.2! OPERATIONAL!                                24!

7! CONCLUSIONS!                                  25!

8! REFERENCES!                                   26!
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APPENDICES!
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Appendix!1:!OPW!Drawings!                          !
Appendix!2:!Rational!Method!                       !
Appendix!3:!WBNM!results!                          !
Appendix!4:!Bioretention!Maintenance!Manual!       !



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Contents

EXECUTIVE SUMMARY I
1 INTRODUCTION 1
1.1 SITE CHARACTERISTICS 1
1.2 PREVIOUS INVESTIGATIONS 2
2 STORMWATER QUALITY 5
2.1 DESIGN OBJECTIVES 5
2.2 © STORMWATER QUALITY TREATMENT 5
2.2.1 STRATEGY 5
2.3. MODELLING APPROACH 7
2.3.1 PHILOSOPHY 7
2.3.2 MUSIC SETUP 7
2.3.3. CATCHMENT AREAS 8
2.3.4 MUSIC MODEL LAYOUT 9
2.4 TREATMENT MEASURES 10
2.4.1 RAINWATER TANKS 10
2.4.2 BIORETENTION SYSTEM 11
2.4.3. SEDIMENT FOREBAYS 11
2.5 RESULTS 13
3 STORMWATER QUANTITY 14
3.1 SITE DRAINAGE AND CATCHMENT DEFINITION 14
3.2 EXISTING SCENARIO 15
3.3. RATIONAL METHOD CALIBRATION 16
3.4 DEVELOPED SCENARIO 16
3.5 MITIGATED SCENARIO 18
4 DETAILED DESIGN DOCUMENTATION 22
5 BIORETENTION MAINTENANCE MANUAL 23
6 WATER QUALITY MONITORING 24
6.1 CONSTRUCTION 24
6.2 OPERATIONAL 24
7 CONCLUSIONS 25
8 REFERENCES 26
APPENDICES

Appendix 1: OPW Drawings

Appendix 2: Rational Method

Appendix 3: WBNM results

Appendix 4: Bioretention Maintenance Manual