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以帽儿山地区蒙古栎凋落叶的含水率、载量和床层高度为控制变量,模拟野外凋落叶床层状态,进行了100次平地无风条件下的室内点烧试验,分析含水率、载量和床层高度对火焰长度和驻留时间的影响,并建立了多元线性预测模型.结果表明:含水率与火焰长度呈极显著线性负相关(P<0.01),与驻留时间的线性关系并不显著(P>0.05);载量、床层高度与火焰长度和驻留时间均呈极显著线性正相关(P<0.01).床层高度与含水率、载量的交互作用对火焰长度有显著影响;含水率与载量、床层高度的交互作用对驻留时间有显著影响.火焰长度预测模型的预测效果较好,能解释火焰长度83.3%的变异,平均绝对误差为7.8cm,平均相对误差为16.2%;驻留时间预测模型的效果略差,仅能解释驻留时间54%的变异,平均绝对误差为9.2s,平均相对误差为18.6%.
Taking the moisture content, the loading capacity and the bed height of litter of Quercus mongolica in the Maoershan area as control variables, the bed litter condition of the litter was simulated and the indoor point-burning test was conducted under no-wind conditions for 100 times. The moisture content, Load and bed height on flame length and residence time, and established a multivariate linear model.The results showed that there was a significant linear negative correlation between moisture content and flame length (P <0.01), linearity with residence time (P> 0.05). There was a significant linear positive correlation between load and bed height and flame length and residence time (P <0.01). Interaction between bed height and water content and load had no significant effect on flame The interaction between water content and loading and bed height had a significant effect on the residence time.The flame length prediction model had a good prediction effect and could explain the variation of flame length of 83.3% with an average absolute error of 7.8cm , And the average relative error was 16.2%. The dwell time prediction model was slightly worse. It could only explain 54% of the variation of dwell time with an average absolute error of 9.2s and an average relative error of 18.6%.