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- W4313019390 abstract "Complex interactions between fuel structure and fire highly affects the fire spread efficiency and localized behaviour. Heterogeneous arrangement of the fuel coupled with variability in fuel characteristics can strengthen or hinder heat transfer efficiency, preheating of unburned fuel and consecutive ignition. In this study, we leverage recently developed non-intrusive unmanned aerial vehicle-based (UAV) methods to spatially resolved field-scale fire behaviour properties and compare them with the Canopy Height Model (CHM) derived from pre-burn lidar measurements. Rate of spread and flaming residence time are calculated and mapped from high-resolution overhead visible footages acquired during a four-hectare prescribed gorse fire. The proposed method allows for quantification of the influence of fuel structure spatial variation on fire behaviour properties by capturing localized fire front and burning time variations associated with negative (“gapsâ€) and positive (“bumpsâ€) changes in canopy height. These findings are supported by results obtained from a novel fire flow visualization method based upon image velocimetry, described here for the first time. Complex fire flow is synthetised via 2D time-averaged motion streamlines and compared with CHM fuel structure. Results suggest that localized fire behaviour changes may be related to flow channelling effects induced by the presence of gaps, enhancing fire flow contact and overall heat transfer efficiency." @default.
- W4313019390 created "2023-01-05" @default.
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- W4313019390 date "2022-01-01" @default.
- W4313019390 modified "2023-09-27" @default.
- W4313019390 title "Influence of Fuel Structure on Gorse Fire Behaviour" @default.
- W4313019390 doi "https://doi.org/10.14195/978-989-26-2298-9_226" @default.
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