K. Little, N. Kettridge, C. M. Belcher, L. J. Graham, C. R. Stoof, K. Ivison, A. Cardil
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Cross-landscape fuel moisture differences impact simulated fire behaviour
Background
Predicting fire behaviour is an ongoing challenge in temperate peatlands and heathlands, where live fuels can form the dominant fuel load for wildfire spread, and where spatial heterogeneity in fuel moisture is important but not typically represented in fuel models.
Aims
We examine the impact of fuel moisture variation on simulated fire behaviour across a temperate peatland/heathland landscape.
Methods
We collected field measurements of fuel moisture content in Calluna vulgaris shrub from 36 sites across the North Yorkshire Moors, United Kingdom. We used these to define fuel moisture inputs within existing shrubland fuel models to simulate fire behaviour in BehavePlus.
Key results
Simulated rates of spread varied with fuel moisture content; average mean variance of 23–80% from the landscape average rate of spread. The driest sites had simulated rates of spread up to 135% above the landscape average and the wettest sites up to 86% below average. Fuel model selection dramatically impacted simulated rates of spread by a factor of five.
Conclusions
We need to constrain the role of live fuel moisture within temperate fuel models to develop accurate fire behaviour predictions.
Implications
Capturing cross-landscape heterogeneity in fire behaviour is important for safe and effective land and wildfire management decision-making.
期刊介绍:
International Journal of Wildland Fire publishes new and significant articles that advance basic and applied research concerning wildland fire. Published papers aim to assist in the understanding of the basic principles of fire as a process, its ecological impact at the stand level and the landscape level, modelling fire and its effects, as well as presenting information on how to effectively and efficiently manage fire. The journal has an international perspective, since wildland fire plays a major social, economic and ecological role around the globe.
The International Journal of Wildland Fire is published on behalf of the International Association of Wildland Fire.