Engineering Hydrology Plans (IWMP)

Contents
EXECUTIVE SUMMARY                                    I

1 INTRODUCTION                                       1
1.1 SITE CHARACTERISTICS                             1

2 STORMWATER QUALITY                                 4
2.1 DESIGN OBJECTIVES                                4
2.1.1 TYPICAL POLLUTANTS                             4
2.1.2 OPERATIONAL DESIGN WATER QUALITY OBJECTIVES    4
2.2 STORMWATER QUALITY TREATMENT                     5
2.2.1 STRATEGY                                       5
2.3 MODELLING APPROACH                               6
2.3.1 MUSIC PARAMETERS                               6
2.3.2 CATCHMENT AREAS                                7
2.3.3 MUSIC MODEL LAYOUT                             7
2.4 TREATMENT MEASURES                               9
2.4.1 RAINWATER TANKS                                9
2.4.2 BIORETENTION SYSTEM                           10
2.5 RESULTS                                         13

3 STORMWATER QUANTITY                               14
3.1   EXISTING SCENARIO                             14
3.2   RATIONAL METHOD CALIBRATION                   15
3.3   DEVELOPED SCENARIO                            18
3.4   MITIGATED SCENARIO                            20

4 CONCLUSIONS                                       21

5 REFERENCES                                        22


FIGURES

Figure 1: Locality Plan                              2
Figure 2: Proposed Development Layout                3
Figure 3: Conceptual Treatment Train                 5
Figure 4: Model Layout                               7
Figure 5:Stormwater Quality Catchment Plan           8
Figure 6: Stormwater Quality Management Strategy    12
Figure 7: Existing Scenario WBNM Sub-Catchments     17
Figure 8: Developed Scenario WBNM Sub-Catchments    19