Amended Bushfire Risk Assessment and Risk Management Plan

                          Ecological Natural Area Management


6.2    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 Queensland State
Planning Policy Natural Hazards, Risk and Resilience Technical Manual.

Table 3: Potential fuel loads for the assessed vegetation communities based on their applicable
potential fuel hazard classes
   Vegetation community                            Vegetation Hazard Class                               Potential fuel load

M quinquinervia woodland                22.2 Melaleuca woodlands on seasonally                               19.7 t/ha
                                           inundated lowland coastal swamps

       Rural residential                40.4 Low grass or tree cover in rural areas                            5 t/ha


Fire Weather Severity
This report will use the specified Forest Fire Danger Index of FFDI 52 as required by Bushfire
Resilient Communities.

6.3    Potential Bushfire Intensity Class for ranges of bushfire fireline intensities
Using the inputs derived above, the Potential Bushfire Intensity Classes for the patches of
vegetation are derived from bands of fireline intensities using the table below.

Table 4: 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)




Bushfire Risk Assessment and Management Plan for a small rural subdivision at 15 Jirrama Cr, Cooroibah                  March 2022

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