Abstract
Techniques for rapid visual assessment of fuel characteristics have a broad range of applications in wildland fire management and research. We developed and tested a technique for assessing forest fuels which provides hazard ratings for distinct layers within the overall fuel complex, including bark, elevated shrubs, near-surface and surface (forest litter) fuels. These layers are comprised predominantly of fine fuel particles <6 mm diameter. The technique was used to model fuel accumulation in dry eucalypt forest of Eucalyptus marginata at two locations with contrasting understorey structures. We found that visual fuel hazard ratings described patterns of fuel dynamics over time in a similar fashion to models for fuel load accumulation. Visual hazard ratings can be related qualitatively to factors that reflect the difficulty of fire suppression by experienced fire fighters including visibility through the forest, access, difficulty of working machinery, flame height and spotting potential. The ability to relate hazard ratings to fire spread prediction needs to be tested.
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