兴安落叶松针叶床层火蔓延的模拟

以黑龙江省帽儿山地区典型森林类型兴安落叶松林地表可燃物为研究对象,分析不同可燃物含水率、可燃物载量、风速和坡度与火蔓延速度之间的关系,共进行4（可燃物载量）×4（可燃物含水率）×3（风速）×3（坡度）=144组点烧试验,并建立适用于兴安落叶松针叶林的火蔓延模型。结果表明:在试验设定范围内,可燃物床层在火蔓延过程中80%为阴燃,火蔓延速度在75%区间内不超过6 m·h-1,最大值为93.02 m·h-1、最小值为0.41 m·h-1;可燃物载量对火蔓延速度影响不显著。

Taking the surface fuels of the typical Dahurian larch (Larix gmelinii) forest in the Maoershan area of Heilongjiang Province as the research subject, this study analyzed the correlations between fuel moisture content, fuel load, wind speed, slope gradient and fire spread rate. A total of 144 spot ignition experiments were carried out using a full factorial design with 4 levels of fuel load, 4 levels of fuel moisture content, 3 levels of wind speed and 3 levels of slope gradient. A fire spread model suitable for Dahurian larch coniferous forests was then established. The results showed that within the experimental range, 80% of the fire spread process of the fuel bed was smoldering combustion; for 75% of the measured cases, the fire spread rate did not exceed 6 m·h⁻¹, with the maximum value reaching 93.02 m·h⁻¹ and the minimum value being 0.41 m·h⁻¹. Fuel load exhibited no significant effect on fire spread rate.

搜集汇总

背景与挑战

背景概述

该数据集通过144组点烧试验研究了兴安落叶松针叶床层火蔓延的模拟，分析了可燃物含水率、载量、风速和坡度对火蔓延速度的影响，并建立了火蔓延模型。试验结果显示，火蔓延速度在75%的区间内不超过6 m·h-1，且可燃物载量对火蔓延速度影响不显著。