BUSHFIRE HAZARD ASSESSMENT AND MANAGEMENT PLAN v2 - Coveys Road TINBEERWAH (1)

Bushfire Hazard Assessment and Management Plan v2                                                               NCES REF: J000545
Lot 2, 4 & 5 on RP172460 & Lot 7 on RP895754
66, 82 & 98 Coveys Rd & 39 Tinbeerwah Rd, Tinbeerwah


3         SPP HAZARD ASSESSMENT

3.1       Hazard Assessment Methodology
The NSC Planning Scheme Policy for the Bushfire Overlay Code requires that a site-specific bushfire
hazard assessment be prepared to assess the degree of bushfire hazard acting on a site captured
within a mapped Designated Bushfire Hazard Area. The SPP Bushfire Prone Area mapping prevails
over the NSC Bushfire Hazard Area mapping with respect to the currency of the methodology
adopted to prepare the mapping. Accordingly, the site-specific hazard mapping required by the
Bushfire Hazard Overlay Code is to be prepared consistent with the methodology adopted to prepare
the SPP mapping.
The methodology used to prepare the SPP mapping is described in:
      •    Department of Infrastructure, Local Government and Planning’s Natural Hazards, Risk and
           Resilience –– Bushfire (December 2019) State Planning Policy – state interest guidance
           material; and
      •    Queensland Fire and Emergency Services - (2019) Planning for Bushfire Resilient
           Communities.
Site-specific hazard maps are referred to as Local Hazard Area Maps in the SPP documents. The
preparation of Local Hazard Area Maps has been undertaken for the site in accordance with the
methodology described in the above referenced documents.

3.2       Local Hazard Area Map
A Local Hazard Area Map was prepared by adopting the following methodology:
      •    Categorizing the vegetation within the site in accordance with the vegetation hazard classes
           derived from Leonard et al. (2017);
      •    Subdividing the identified vegetation hazard classes into bushfire hazard sub-units based on
           slope differences and vegetation hazard classes. All upslope and across slope vegetation
           units are allocated an underlying slope of 1 degree as per methodology prescribed within
           Queensland Fire and Emergency Services - (2019) Planning for Bushfire Resilient
           Communities;
      •    Assigning SPP Potential Bushfire Intensity classes to the sub-units;
      •    Using the patch and corridor filtering process identified in Leonard et al. (2014 & 2017) to
           amend the bushfire hazard sub-units1; and
      •    Application of 100m Potential intensity buffers to the amended sub-units to derive an overall
           Local Hazard Area Map.
Table 1 details the Potential Bushfire Intensity classes and their corresponding potential fire-line
intensity (kW/m) values as prescribed within Leonard et. al. 2017.




1 The patch and corridor filtering process to remove or downgrade hazard levels of small patches and narrow corridors involves the

following three stages:
      •    Merging small patches of a single Vegetation Hazard Class less than 0.5 ha;
      •    Merging small Vegetation Hazard Class patches between 0.5 and 1 ha with higher or moderate fuel loads (greater than 8
           tonnes/ha); and
      •    Removing narrow corridors of vegetation less than 50m wide through a process of patch erosion and dilation. These small
           patches are merged with surrounding vegetation by allocating a patch to the Vegetation Hazard Class that is most common to
           the patch boundary (Leonard et al., 2017).




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