Generating fuel consumption maps on prescribed fire experiments from airborne laser scanning
T. Ryan McCarley![https://orcid.org/0000-0002-4617-2866](/media/client/orcid_16x16.png)
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Abstract
Characterisation of fuel consumption provides critical insights into fire behaviour, effects, and emissions. Stand-replacing prescribed fire experiments in central Utah offered an opportunity to generate consumption estimates in coordination with other research efforts.
We sought to generate fuel consumption maps using pre- and post-fire airborne laser scanning (ALS) and ground measurements and to test the spatial transferability of the ALS-derived fuel models.
Using random forest (RF), we empirically modelled fuel load and estimated consumption from pre- and post-fire differences. We used cross-validation to assess RF model performance and test spatial transferability.
Consumption estimates for overstory fuels were more precise and accurate than for subcanopy fuels. Transferring RF models to provide consumption estimates in areas without ground training data resulted in loss of precision and accuracy.
Fuel consumption maps were produced and are available for researchers who collected coincident fire behaviour, effects, and emissions data. The precision and accuracy of these data vary by fuel type. Transferability of the models to novel areas depends on the user’s tolerance for error.
This study fills a critical need in the broader set of research efforts linking fire behaviour, effects, and emissions.
Keywords: airborne laser scanning (ALS), emission source, FASMEE, fire, Fishlake National Forest, fuel beds, fuel consumption, Monroe Mountain, prescribed fire, stand-replacing.
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