Rate of spread and flaming zone velocities of surface fires from visible and thermal image processing

This study presents two new remote sensing approaches that can be used to derive rate of spread and flaming zone velocities a wildfire at very high spatiotemporal resolution. Time sequential image tracking from thermal or visible video collected on uncrewed aerial vehicles is estimate instantaneous spatial surface fire. The techniques were developed using experimental wheat‐stubble burns carried out near Darfield, New Zealand, in March 2019. technique based Thermal Image Velocimetry, which tracks evolving temperature patterns within an infrared video. uses colour thresholding, fire perimeter progression through time pixel Results show the creates higher mean compared velocimetry. provides measurements for front whereas techniqueis computationally more expensive, but resolve structures measurements. Both are available as open‐source code providevital scientific data studies concerning e.g. fire–atmospheric interactions model validation. They may adapted operational purposes providing