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本文采用黑龙江省各县的森林覆盖率、森林可燃物载量、林木组成、海拔、防火期月平均气温、相对湿度、风速和降水量8个因子,通过权重和累计概率的方法,应用ARC/INFO技术,并采用矢量图形法中的栅格数据矢量化法,把黑龙江省森林分布图和黑龙江省行政区划图绘成电子地图,然后将其叠加,再转换成大地坐标,从中提取相关数据,最后划分了5个等级的可燃物类型区。全省81个县(林业局)中一、二、三、四和五级森林可燃物类型区分别占全省总数的16%、17%、17%、11%、38%。一级森林可燃物类型区集中在大、小兴安岭、张广才岭、老爷岭等山地林区;五级森林可燃物类型区主要集中分布在松嫩平原、三江平原等地区;其它三种级别的森林可燃物类型区介于平原与山地之间。图2表4参8。
In this paper, we use the eight factors of forest coverage, forest fuel load, forest composition, altitude, monthly mean temperature of the fire protection period, relative humidity, wind speed and precipitation in Heilongjiang Province. By using the method of weight and cumulative probability, INFO technology, and the use of vector graphics method of raster data vectorization method, the Heilongjiang Province and Heilongjiang Province, the administrative map of the map is mapped into an electronic map, and then superimposed, and then converted to earth coordinates, from which to extract the relevant data, Finally, five levels of combustibles are divided. The first, second, third, fourth and fifth class of forest fuel types in 81 counties (forestry bureaus) in the province accounted for 16%, 17%, 17%, 11% and 38% of the total number of the province respectively. The first type of forest combustibles is concentrated in mountainous forest areas such as Xiaoxing’anling, Zhangguangcailing and Laoyeling. The five types of forest combustibles are mainly distributed in Songnen Plain and Sanjiang Plain. The other three levels of forest combustibles The type area is between the plain and the mountain. Figure 2 Table 4 Reference 8.