BsmFinal_1

List Of Contents

1.      Introduction And Summary                                                                 3
1.1     Introduction                                                                             3
1.2     Summary                                                                                  3

2.      XPStorm Modelling - Existing Scenario                                                    4
2.1     Adopted Software                                                                         4
2.2     Catchment Representation                                                                 4
2.3     Floodway Roughness                                                                       4
2.4     Storm Rainfall Inputs And Infiltration                                                   4
2.5     Rational Method Sanity Check                                                             5
2.6     Existing Flood Levels                                                                    5

3.      XPStorm Modelling – Developed Scenario                                                  10
3.1     Model Adjustment For Development Changes                                                10
3.2     Flood Impacts For Existing Climate                                                      10
3.3     Design Flood Levels With Climate Change                                                 11
3.4     100 Year Flood Boundaries                                                               11
3.5     Impact Of Floodway Revegetation And Full Culvert Blockage                               12
3.6     Depth x Velocity Parameters On Causeways                                                12


List Of Figures

1.      Locality, Overall Catchment And XPStorm Model Extent                                     6
2.      Downstream Area Of XPStorm Model                                                         7
3.      Photographs Of Existing Floodways On Site                                                8
4.      Photographs Of Existing Floodway Downstream Of Site                                      9
5.      Proposed Development Changes And 100 Year Flood Boundaries                              13


List Of Tables

1.      Comparison, Rational Method To XPStorm                                                    5
2.      Impacts On Flood Levels At Upstream Boundaries Of Site, For Existing Climate Regime     10
3.      Impacts On Flood Levels Downstream Of Site, For Existing Climate Regime                 11
4.      100 Year Flood Levels, With And Without Climate Change                                  11
5.      Maximum 100 Yr Flood Levels With Climate Change, Revegetation & Fully Blocked Culverts 12




                                                                                              Page 2
      Brisbane Stormwater Management Pty Ltd Document File: ChurchSt.Doc