Appendix B - Bushfire Hazard Assessment

the rate of spread. As a general rule, the rate of fire spread (and fireline intensity) doubles up a 10-degree
slope and quadruples up a 20-degree slope (QFES,2019).

The land to the south, east and west of the development area is located upslope of the site. The land to
the north is located across slope or on low grades of less than 1 degree. Where the slope under hazardous
vegetation is located across slope, it is considered ‘upslope’ irrespective of the slope of land between the
site and the edge of the hazardous vegetation. Note that for the purposes of undertaking a bushfire hazard
assessment, where the topography is flat or where vegetation is located upslope of an assessment site, a
slope of 1 degree is required to be used to satisfy the mathematical formula, however it has negligible
impact on the calculations.

2.1.4   Fire Danger Index
The Queensland government produce a publicly available data package which includes selected inputs
and information used by the CSIRO in conjunction with the QFES to prepare the State-wide Bushfire
Hazard Area (Bushfire Prone Area) mapping (July 2014). The data includes Fire Weather Severity (Fire
Danger Index - FDI). A review of the dataset for the assessment area indicates that the site is located
within a band of FDI 47.




NOVEMBER 2022                            BUSHFIRE HAZARD ASSESSMENT                                   Page: 11
                                     157 LAWNVILLE ROAD, BLAK MOUNTAIN