Appendix C - Code Assessment

Flood Hazard Overlay Code



compromise the safety of people resulting from the flood    remains passable, with sufficient flood warning time, to
risk associated with events exceeding the DFE.              enable people to progressively evacuate to safe areas
                                                            above the PMF in the face of advancing flood or waters
                                                            for events that exceed the DFE.

                                                            OR

                                                            AO4.2
                                                            Development provides for an area of sufficient size and
                                                            dimensions on site above the PMF that allows for safe
                                                            congregation and refuge.
                                                                                                                          AO4.3 – Complies
                                                            AO4.3                                                         Each lot provides flood free access to Jirrima Crescent
                                                            Where the existing roads servicing a development              which is trafficable during an DFE.
                                                            provide a specific flood immunity (as determined by the
                                                            Qld Transport Road and Drainage Design Manual,
                                                            Queensland Urban Drainage Manual and the Australian
                                                            Rainfall and Runoff Guide), all lots have access to the
                                                            flood free area identified in Table 8.2.6.5 that matches
                                                            the road immunity.
PO5                                                         AO5                                                           AO5 – Complies
For reconfiguring a lot or operational works,               In the Flood Hazard Overlay, or in areas otherwise            The development will not cause any loss to flood
development does not directly, indirectly or cumulatively   determined to be subject to the DFE or DSTE,                  storage capacity or result in any changes to the
alter the flood characteristics external to the             development ensures:                                          hydrological regime.
development site for all flooding and inundation events
up to and including the DFEor DSTE based on:                 a)   there is no loss of on-site flood storage capacity;
                                                             b)   all changes to level, depth, duration and velocity of
                                                                  floodwaters are contained within the site for all
 a)   current climate conditions; and                             flood events up to and including the DFE based on
 b)   incorporating an appropriate allowance for the              current climate and predicted impacts of climate
      predicted impacts of climate change.                        change at 2100; and
                                                             c)   there is no acceleration or retardation of flows, or
                                                                  any retardation in flood warning times, elsewhere
                                                                  on the floodplain and to any overland flow paths;
                                                                  and