【摘要】 以北京市房山区1986-2004年的林火历史数据为基础,结合房山区的地形和林业二类调查数据, 以地理信息系统ArcView GIS为工具,研究了房山林火发生强度与环境因子之间的关系。结果表明,林火发生强度与环境因子间的关系密切,林火发生强度与风速成正比,与坡度成线性递增关系,与绝对海拔高度成二次抛物线关系;林火强度受坡向的影响,发生在东坡和东南坡的林火强度较大;林火发生强度还受树种的影响,针叶树的林火强度大于阔叶树。更多还原

【Abstract】 Based on the historical forest fire datum of Fangshan district from 1986 to 2004,and the map and the forest management inventory data of the Fangshan district,with the geographic information system tool- ArcView GIS,the relationship between the forest fire extension and the environment factors were analyzed. The results show that the forest fire intensity was affected by many factors directly. There is a liner relationship between the fire risk and the slope,with elevation conic. The fire intension is greater in the eastern slope and the southeastern slope than that in other slopes. Tree species affects forest fire intensity, and the fire intensity of the conifer is greater than that of the broadleaf.更多还原