RFI - stormwater report

Contents
EXECUTIVE SUMMARY                                          I

1 INTRODUCTION                                             4
1.1 SITE CHARACTERISTICS                                   4

2 STORMWATER QUALITY                                       6
2.1 DESIGN OBJECTIVES                                      6
2.2 STORMWATER QUALITY TREATMENT                           6
2.2.1 STRATEGY                                             6
2.3 MODELLING APPROACH                                     6
2.3.1 MUSIC PARAMETERS                                     6
2.3.2 CATCHMENT AREAS                                      7
2.3.3 MUSIC MODEL LAYOUT                                   8
2.4 TREATMENT MEASURES                                     9
2.4.1 BIORETENTION SYSTEM                                  9
2.5 RESULTS                                               10

3 STORMWATER QUANTITY                                     11
3.1.1   SITE EXISTING SCENARIO                            11
3.1.2   SITE RATIONAL METHOD VALIDATION (A01)             12
3.1.3   SITE DEVELOPED SCENARIO                           12
3.1.4   REGIONAL EXISTING SCENARIO                        14
3.1.5   REGIONAL RATIONAL METHOD VALIDATION (C1 OUTLET)   14
3.1.6   REGIONAL DEVELOPED SCENARIO                       15
3.1.7   LAWFUL POINT OF DISCHARGE                         16

4 CONSTRUCTION PHASE MANAGEMENT                           17
4.1 EROSION AND SEDIMENT CONTROL                          17

5 ESTABLISHMENT AND OPERATIONAL PHASE MANAGEMENT          18
5.1 ESTABLISHMENT                                         18
5.2 OPERATIONAL                                           18

6 CONCLUSIONS                                             19

7 REFERENCES                                              20
APPENDICIES
Appendix 1: Site Layout                                   21
Appendix 2: Site Rational Method and WBNM Outputs         22
Appendix 3: Regional Rational Method and WBNM Outputs     23

FIGURES
Figure 1-1: Locality Plan                                  5
Figure 1-2: Flood Hazard Overlay Map                       5
Figure 2-1: WSUD Catchment and Locality Plan               8
Figure 2-2: MUSIC Model Layout                             8
Figure 3-1: Existing WBNM Site Catchment Plan             11