Sample plots were set up in Platycladus orientalis, Pinus tabuliformis, Pinus armandii and Larix principis-rupprechtii forests in Badaling of Beijing, and small sample quadrates were also established in every sample plot. In every quadrat, dead grass, living grass, liter as well as 1 h, 10 h, and 100 h surface deadwood were collected, and the combustible parameters of the fuels were determined in terms of calorific value, extract content, ash content, and moisture content of the fuels. Fire spread rate, heat productivity per unit area, fireline intensity, and flame length of the fuels in the four types of forests were calculated by the Rothermel model. Corresponding measures of fire suppression could be taken according to the situation of fire behavior.%在八达岭林场的侧柏林(Platycladus orientalis)、油松林(Pinus tabuliformis)、华山松林(Pinus ar mandii)和华北落叶松(Larix principis-rupprechtii林内设置样地,在样地内设置小样方.采集每个小样方内的死草、活草、凋落物及1、10、100h的地表枯枝,测定可燃物热值、抽提物质量分数、灰分质量分数及含水量,确定可燃物参数.利用Rothermel模型,对4种林分可燃物火行为的蔓延速率、单位面积发热量、火线强度、火焰长度进行了计算.根据火行为状况,制定了相应的火灾扑救对策.
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