摘要
森林地被可燃物含水率的动态变化是影响森林火险等级高低的因素之一,为研究不同地形条件对1 h时滞可燃物含水率的影响,采集哈尔滨城市林业示范基地的白桦林和兴安落叶松—白桦混交林地被物以及林地内的土壤,借助变坡土槽在实验室模拟6种不同坡向坡度的森林地被可燃物床层结构,连续监测可燃物含水率和气象参数的动态变化,绘制可燃物含水率动态变化曲线,计算不同地形条件下可燃物含水率的统计学特征。结果表明,平地可燃物含水率>缓坡可燃物含水率>陡坡可燃物含水率,阴坡可燃物含水率>阳坡可燃物含水率;构建了不同地形条件下地被可燃物含水率气象要素回归模型。
Dynamics of moisture of combustible materials on forest land is one of the most important factors which influences forest fire danger forecasting. In order to investigate the relation between topography and one-hour moisture of combustible materials, the ground cover and soil of Betula platyphylla and Larix gmelinli were collected as samples from Harbin city forestry demonstration base. After building six kinds of forest combustible floor and continuous monitor of the dynamics of the moisture and meteorological factors in the laboratory, the dynamic curve was drawn and the statistical characteristics of combustible materials moisture in different topography was calculated. The experiment demonstrated that flat ground combustible moisture 〉 gentle slope combustible moisture 〉 steep slope combustible moisture; shady slope combustible moisture 〉 sunny slope combustible moisture. Accordingly the meteorological elements regression model of combustible materials moisture under forest in different topography has been built.
出处
《森林与环境学报》
CSCD
北大核心
2016年第1期80-85,共6页
Journal of Forest and Environment
基金
林业公益性行业科研专项"基于地面与遥感观测的森林火险预报新技术"(4131440201)
关键词
坡向
坡度
环境因子
可燃物含水率
室内模拟
slope aspect
slope gradient
environment factor
combustible materials moisture
simulation in laboratory
