Appendix D - Bushfire Assessment · RAL26/0026

5.0      BUSHFIRE IMPACT REDUCTION
5.1      GENERAL
The bushfire hazard assessment undertaken in Section 2 and the Local Hazard Map prepared in Section 3
concluded that the proposed building envelope within the new allotment is located within a Potential
Impact Buffer associated with a Medium Potential Bushfire Intensity area. As the proposed development
site has been confirmed to be located within a bushfire hazard area, measures are required to be
implemented to mitigate impacts associated with bushfire. The measures nominated will reduce the risk
of bushfire impact to people and property and have been determined with reference to:
      Noosa Plan 2020 Bushfire Hazard Overlay Code
      Natural Hazards, Risk and Resilience –– Bushfire State Planning Policy – state interest guidance
         material (The Department of Infrastructure, Local Government and Planning, 2019)
      Bushfire Resilient Communities. Technical Reference Guide for the State Planning Policy State
         Interest ‘Natural Hazards, Risk and Resilience - Bushfire’ (Queensland Fire and Emergency
         Services, 2019)

5.2      SETBACKS
Bushfire can impact infrastructure via several attack mechanisms: direct flame, radiant heat and ember
attack. Asset Protection Zones (APZ) provide the most strategically valuable defence against direct flame
and radiant heat, and to a lesser extent embers. Plate 9 depicts the general components of an APZ.




Plate 9: Asset Protection Zone (Source: NSW RFS, 2006)

Assessment Benchmark 4 of the State Planning Policy – state interest guidance material requires that
development supports, and does not hinder, disaster management response or recovery capacity or
capabilities. Where reconfiguring a lot creating lots of greater than 2000 square metres, to ensure
emergency access and operational space for firefighters, a development footprint plan must be separated
from the closest edge of the adjacent mapped medium, high or very high potential bushfire intensity area
by a distance that achieves a radiant heat flux level of 29 kilowatt per square metre or less.

Quantitative modelling using FLAMESOL software has been undertaken to identify the setback
requirements to achieve the <29 kW/m² radiant heat flux SPP requirement. The input data used, and the
calculated required cleared setbacks are presented in Table 2 below with the full FLAMESOL transcript
provided as Appendix B (refer to transcript for VHC 9.1 and VHC 22.1).



AUGUST 2026                     BUSHFIRE HAZARD ASSESSMENT & MANAGEMENT PLAN                     Page: 21
                                        380 MCKINNON DRIVE, COOROIBAH