MCU21-0134 - Approved Bushfire Management Plan

Bushfire Management Plan v1                                                                 NCES REF: J000953
Lot 189 on MCH1261 – 64 Reserve St, Pomona




3    HAZARD ASSESSMENT

3.1 SPP Fireline Intensity Class Validation
An assessment has been undertaken to validate the SPP High Potential Bushfire Intensity Class
mapped across the site. Table 2 details the SPP Potential Bushfire Intensity classes and their
corresponding potential fire-line intensity (kW/m) values as prescribed within Leonard et. al. 2017
and QFES 2019.
Table 2 - Potential Bushfire Intensity classes




The Potential Bushfire Intensity Class is primarily influenced by slope conditions (i.e., topography)
and vegetation type fuel loads.

3.2 SPP Intensity Class Validation

Based on observed conditions, the SPP mapping correctly maps VHC 8.1 as the applicable
vegetation class on the site, however, neglects the narrow band of VHC 9.1 in the western site
extent. The assigned high potential fire line intensity class is accurate for the VHC 8.1 area given
the across slope conditions but is expected to be exaggerated for the VHC 9.1 area.

Flamesol modelling was subsequently undertaken to validate the potential fire line intensity based
on the point of reference slope conditions underlying the hazardous vegetation. Table 3 summarises
the input data used:
Table 3 – Input Data

 Input Parameter                                 Input Data
                                                 Type A – Forest
 AS 3959 Vegetation Type

 QFES Vegetation Hazard Classes and Fuel         8.1 Wet eucalypt tall open forest
 Loads                                           (31 t/ha combined surface and 35 t/ha total fuels)
                                                 9.1 Moist to dry eucalypt open forests on coastal lowlands
                                                 and ranges
                                                 (21 t/ha combined surface and 24.2 t/ha total fuels)
 Effective slope(s) under the classified         1 degree all directions
 vegetation type


 Flame Width                                     100m all directions

A QFES Forest Fire Danger Index (FFDI) 47 has been used as assigned by QFES (refer to Plate
6)




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