林业科学2025，Vol.61Issue(12)：135-145,11.DOI:10.11707/j.1001-7488.LYKX20240806
机械清除林区道路两侧可燃物降低火灾风险效果评估
Evaluation of the Effectiveness of Mechanical Clearance of Combustible Materials on Both Sides of Forest Roads on Reducing Wildfire Risk:a Case Study in Saihanba Mechanical Forest Farm
摘要
Abstract
[Objective]This study aims to evaluate the effectiveness of mechanically removing highly flammable fine fuels on both sides of the road in reducing wildfire risk,and to investigate the mechanisms through which this practice influences fire behavior.The findings are intended to provide theoretical and data-driven support for developing scientific fuel management strategies.[Method]Prior to the autumn fire prevention period in the Saihanba Mechanical Forest Farm,field plot surveys and laboratory experiments were conducted to measure key fuel parameters(e.g.,height,load,moisture content)before and after mechanical removal.The BehavePlus fire behavior modeling system was used to simulate potential fire behavior characteristics before and after removal in various environmental scenarios.[Result]Firstly,the mechanical removal treatment was highly effective.The average fuel height along the roadsides was significantly reduced from 0.65 m to 0.18 m.Fuel load decreased by more than 50%in nearly 60%of the sample plots.Secondly,the removal operation directly led to a sharp decline in all fire behavior indicators.The average rates of decrease for surface fire rate of spread,heat per unit area,fireline intensity,and flame length reached 73.00%,43.75%,84.81%,and 57.98%,respectively.Notably,the mitigating effect on fire behavior was more pronounced in areas with initially higher fuel heights(e.g.,1.0 m),where the reduction in key fire behavior indicators could exceed 95%.Furthermore,the practice of subsequently clearing the mowed fuels away had superior risk reduction compared to simply mowing without removal.Model simulations also confirms that mechanical removal significantly suppresses fire behavior even under extreme environmental conditions characterized by high wind speed,low fuel moisture content,and steep slopes.[Conclusion]Mechanical removal effectively reduces the height and load of flammable fine fuels both sides of forest roads,thereby significantly inhibiting potential fire behavior and lowering wildfire risk.For future management,it is recommended to flexibly adjust the intensity and timing of removal operations based on regional ecological characteristics to achieve the dual objectives of minimizing wildfire risk and maintaining ecosystem stability.关键词
林区道路/可燃物管理/细小可燃物/极端火环境/机械清除/火行为/BehavePlusKey words
forest roads/fuel management/fine fuels/extreme fire environment/mechanical removal/fire behavior/BehavePlus分类
农业科技引用本文复制引用
闫凯达,李笑笑,张师渊,周暖阳,司莉青,赵凤君,张建华,邹全程,彭志杰,韩冬,徐健楠..机械清除林区道路两侧可燃物降低火灾风险效果评估[J].林业科学,2025,61(12):135-145,11.基金项目
国家林业和草原局揭榜挂帅项目"三北工程攻坚战关键技术研发"(202401) （202401）
中国林业科学研究院基本科研业务费专项(CAFYBB2024ZA004) （CAFYBB2024ZA004）
国家自然科学基金项目(32271895). （32271895）
