Refernce Documents - RAL25 0001

                 4.2    NOOSA PLAN 2020

                 Noosa Plan 2020 identifies areas subject to bushfire hazard on the Bushfire Hazard Overlay.
                 An extract from the Bushfire Hazard Overlay map for the site is indicated in Figure 5 (Map 3).

                 Certain assessable development in areas subject to the Bushfire Hazard Overlay requires
                 assessment against the Bushfire Hazard Overlay Code. The purpose of the Bushfire Hazard
                 Overlay is to, inter alia, to ensure that development avoids or mitigates the potential adverse
                 impacts of bushfire on people, property, economic activity and the environment. The purpose
                 is achieved by ensuring that development does not expose people and property to an
                 unacceptable risk of bushfire attack and, where applicable, provide treatments which reduce
                 bushfire risk and provide for a safe environment for emergency services. Amongst other
                 things, Bushfire Hazard Overlay Code requires the preparation of a site-specific bushfire
                 hazard assessment and management plan, prepared in accordance with Planning Scheme
                 Policy 8 – Natural Hazards (PSP). The PSP requires that the level of bushfire hazard shown on
                 the Bushfire Hazard Overlay Map be confirmed via assessment of predicted bushfire
                 behaviour including calculation of predicted fire intensity and rate of spread using McArthur’s
                 equation and radiant heat flux using a recognised model such as the View Factor Model. The
                 PSP indicates calculations should be based on a forest fire danger index (FFDI) of 50 and
                 maximum predicted fuel loads to determine appropriate setbacks.

                 The current State guidance material for bushfire hazard which is set out in Bushfire Resilient
                 Communities (Queensland Fire and Emergency Services 2019) utilises a quantitative method
                 as per Leonard et al. (2014) which predicts actual fire behaviour including calculation of
                 predicted fire intensity and rate of spread using a modified version of McArthur’s equation.
                 The latter is generally consistent with the PSP and to the extent that there are any
                 inconsistences, Bushfire Resilient Communities (Queensland Fire and Emergency Services
                 2019) approach 1 is preferred because it provides an actual estimate of fire behaviour, rather
                 than a qualitative estimate of potential hazard; providing a basis for improved decision-
                 making regarding the likelihood and severity of bushfire attack (i.e. risk assessment).

                 The following section of the report provides an overview of the methodology used to assess
                 bushfire hazard, including quantitative measurement of fire intensity and, where necessary,
                 radiant heat flux.




                 1 Leonard et al. 2014



                                                                                                              8 | 31




Document Set ID: 23448646
Version: 1, Version Date: 13/01/2025