Cross-landscape fuel moisture differences impact simulated fire behaviour

IF 2.9 3区农林科学 Q1 FORESTRY

International Journal of Wildland Fire Pub Date : 2024-09-06 DOI:10.1071/wf24019

K. Little, N. Kettridge, C. M. Belcher, L. J. Graham, C. R. Stoof, K. Ivison, A. Cardil

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引用次数: 0

Abstract

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.

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跨地貌燃料湿度差异对模拟火灾行为的影响

背景预测火灾行为是温带泥炭地和热地一直面临的挑战，在这些地区，活燃料可能构成野火蔓延的主要燃料负荷，燃料水分的空间异质性非常重要，但通常不会在燃料模型中体现出来。目的我们研究了燃料湿度变化对温带泥炭地/荒漠景观模拟火灾行为的影响。方法我们从英国北约克郡沼泽地的 36 个地点收集了灌木 Calluna vulgaris 中燃料水分含量的实地测量数据。我们利用这些数据定义了现有灌木林燃料模型中的燃料水分输入，以便在 BehavePlus 中模拟火灾行为。主要结果模拟的蔓延率随燃料水分含量而变化；与地貌平均蔓延率相比，平均差异为 23-80%。最干旱地点的模拟蔓延率比地貌平均值高出 135%，而最潮湿地点的模拟蔓延率比平均值低 86%。燃料模型的选择极大地影响了模拟的传播率，影响程度达到 5 倍。结论我们需要在温带燃料模型中限制活燃料水分的作用，以制定准确的火灾行为预测。意义捕捉火灾行为的跨地貌异质性对于安全有效的土地和野火管理决策非常重要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Wildland Fire 农林科学-林学

CiteScore

5.50

自引率

9.70%

发文量

审稿时长

12-24 weeks

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.