Bushfire Risk Assmt & Risk Mngt Plan for house at 8 Hinterland Cl, Tinbeerwah Revision 1 June 2022 ENAM

                         Ecological Natural Area Management


5.2     Derivation of inputs for assessment of the Potential Bushfire Intensity Class
The assessment of the Potential Bushfire Intensity Class using the protocol of A new methodology
for state-wide mapping of bushfire prone areas (Leonard et al, 2014) requires the following inputs.
Potential Fuel Load
Based on the map of the visually assessed vegetation communities shown in Figure 8, the
Potential Fuel Loads can be derived by relating the assessed vegetation to Vegetation hazard
class descriptions and 80th percentile potential fuel load in Figure 14 of Bushfire Resilient
Communities.

Table 2: Fuel loads for the vegetation based on their applicable potential fuel hazard classes
   Vegetation community                           Vegetation Hazard Class                          Potential fuel load

Eucalyptus spp, Corymbia                9.1 Moist to dry eucalypt open forests on                        24.2 t/ha
  tessellaris open forest                    coastal lowlands and ranges

      Suburban residential             40.5 Low grass or tree cover in rural areas                         5 t/ha


Fire Weather Severity
The applicable Fire Weather Severity is FFDI 50 as required by Bushfire Resilient Communities

Potential Bushfire Intensity Class as related to fire line intensities
The Potential Bushfire Intensity Class are related to ranges of potential fire line intensities using
the Table below.

Table 3: Table of Potential Bushfire Intensity Class derived from Potential Fire line Intensity
            Potential Bushfire Intensity Class                                  Potential Fire-line Intensity
                           Very high                                                      >40,000 kW/m
                             High                                                  20,000 to 40,000 kW/m
                           Medium                                                   4,000 to 20,000 kW/m
                             Low                                                    Less than 4000 kW/m
(Source: Leonard et al, 2014, page 20)

Potential Impact Buffer
As analysis of heat radiation decay curves and national research indicating that in most fires over
80% of housing loss and 80% of human life loss has occurred within 100m of bushland (Leonard et
al., 2014, page 7) specify that a default 100 meter buffer from the edge of hazardous vegetation
which has a Medium, High or Very High Potential Bushfire Intensity Class.




Bushfire Risk Assessment and Management Plan for a house at 8 Hinterland Cl, Tinbeerwah                             June 2022

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