Fire Safety Science Digital Archive

Some burning testing was carried out on the grassy massland in Da Xing-An-Ling combining with burning control-line in spring and autumn and under the forest of Populus, Betula, Ourecus, Larix in Xiao Xing-An-ling The wild fire burning testing was also simulated in a laboratory. Based on the observing data collected for three years. The effect factors to the fire spread are the wind, the slope, the atmosphere temperature, the fuel moisture, the fuel loading, and the fuel surface area- to-volume ratio; their effects and the regularity are analysed by the regression method. As a result, some fire spread models had been found. Fire spread speed is a linear combination of the factors mentioned above. The mathematical models reveal that the wind speed and the fuel moisture are the most significant factors affecting the fire spread speed; then is the slope, the fuel loading, the fuel surface-area-to-volume, the temprature; the effect of humidity is relatively small. The flame length is mainly detemined by the fuel loading, the wind, the fuel moisture; then is the temperature, the slope, the fuel surface-area-to-volume ratio.