2020-10-21 Final Order - Approval Conditions and Approved Plans - P&E Appeal No 61 of 2018 - RAL17-0504

                               TABLE A-1    FLOOD LEVELS AT THE SITE

                                Event             Notes                                                     Source        Peak Water
                                                                                                                          Level (mAHD)
                                PMF               Probable Maximum Flood based on Current Climate           Model         3.43
                                                                                                            Flood
                                1% AEP            2100 climate change conditions                            Information   2.30
                                                                                                            Certificate
                                                  20% increase rainfall intensity, 0.8m sea level rise
                                1% AEP                                                                      Model         2.23
                                                  and 0.8m increase in bathymetry
                                1% AEP            20% increase rainfall intensity and 0.8m sea level rise   Model         2.24
                                1% AEP            Current Climate                                           Model         1.61
                                2% AEP            Current Climate                                           Model         1.42
                                5%AEP             Current Climate                                           Model         1.24
                                10%AEP            Current Climate                                           Model         1.10
                                18% AEP           Current Climate                                           Model         0.91
                                39% AEP           Current Climate                                           Model         0.73

                               Flood Depth and Hazard
                               The nature of the Noosa River and creek flooding on this site means that flood water velocities are close to
                               zero.

                               The low-lying areas of the site are inundated by flooding as frequent as the 39% flood which would be up to
                               0.23m in depth across the western portion of the site which is zoned as Open Space Conservation. The
                               proposed development includes building pad levels of 2.6mAHD placing it more than 0.3m above the 1%AEP
                               2100 Climate Change Flood Level.

                               The ground floor levels of any newly constructed residential dwelling would be at a minimum of 2.8mAHD (for
                               habitable parts of the building), at least 0.5m above the 1%AEP 2100 Climate Change Flood Level. The first
                               floor levels would therefore be a minimum of 4.9mAHD (assuming a minimum floor-to-ceiling height of a non-
                               habitable room such as a kitchen or laundry on the ground floor being 2.1m as per the Building Code of
                               Australia).

                               The analysis summarised in Table A-1 indicates that a PMF flood level is approximately 0.83m above the
                               building pad height, 0.63m above the minimum finished ground floor level and approximately 1.5m lower than
                               the minimum first floor level. The first floor therefore provides a refuge for events exceeding the 1%AEP
                               Climate Change Flood Level up to and including a PMF event.
5865_R02_V06_Final_FEMP.docx




                               Andres Gabarrin | 27 February 2020
                               135 Lake Weyba Drive, Noosaville
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