UPDATED DA - Attachment 7 - Flood Impact Assessment

                                           CONTENTS
1.0   INTRODUCTION                                                                1
2.0   SITE DESCRIPTION                                                            1

      2.1   Site Location                                                          1

      2.2   Existing Land-use, Topography and Drainage                             2

      2.3   Proposed Land-use                                                      2
3.0   FLOOD IMPACT ASSESSMENT                                                     3

      3.1   Flood Modelling                                                        3

      3.2   Hydrology                                                              3

      3.3   Temporal Patterns and Rainfall Intensity                               4

      3.4   Rainfall Durations                                                     4

      3.5   Rainfall Losses                                                        4

      3.6   Pre-Burst Rainfall                                                     4

      3.7   Areal Reduction Factor                                                 4

      3.8   Manning’s n Values                                                     5

      3.9   Fraction Impervious                                                    5

      3.10 Topography                                                              5

      3.11 Grid Cell Size                                                          6

      3.12 Tailwater Conditions                                                    6

      3.13 Hydraulic Structures                                                    6

      3.14 Developed Case Scenario                                                 9

      3.15 Results                                                                 9
4.0   CONCLUSION                                                                  11
5.0   REFERENCES                                                                  11

                         APPENDIX                      DESCRIPTION

                        Appendix A                       Site Plans

                        Appendix B       Mannings ‘N Roughness Coefficient Maps

                        Appendix C                       Flood Maps