【摘要】 根据1981～1983年在大兴安岭地区测得的草塘沟火烧试验数据,对影响草甸火蔓延的几个重要因子（风速、可燃物含水率、大气温度、相对湿度和可燃物干重量）进行了多元线性回归分析。分析结果表明,风速（V）和可燃物含水率（M）对火蔓延起决定性作用。据此,利用该二项因子V和M进行了二元线性回归,建立草甸火顺风蔓延速度预测模型:R=0.3370+0.0660V-0.0052M。复相关系数R₀=0.818。此模型可为大兴安岭林区火烧防火线安全用火,合理调配点火与扑火力量提供科学参考依据。更多还原

【Abstract】 On the basis of 35 sets of fire spread data, taken from prescribed burning of grassland for constructing firebreaks in Greatxingan Mountains, the effects of wind speed, fuel moisture content, air temperature, relative humidity, and dry weight of biomass on fire spread were analysed using multiple liner regression. A simple model, R=0.3370+0.9660V-0.0052M, based on wind speed (V) and fuel moisture content(M) was developed for predicting rate of grassland fire forward spread(m/s). It is recommended to be used in planning prescribed fire and controlling and managing wildfira on grassland in forest areas.更多还原