【摘要】 利用极轨卫星遥感资料、气象资料,结合地理信息系统,对2006年5月16日红花尔基樟子松林区重大火灾发生、蔓延的气象条件进行了综合分析,结果表明(1)高温少雨型严重干旱、大风是林火发生和蔓延的重要背景。(2)计算的森林可燃性的综合指标为395、423,表明应是雷击起火,与实际情况相符。(3)风力4级、气温5.9~6.5℃时,火场火势的蔓延速度为137.2hm2·h-1;风力5级、气温7.6~8.4℃时,火场火势的蔓延速度为173.2hm2·h-1。(4)风力在4~5级之间变化、气温在5.9~8.4℃之间变化时,火场火势的蔓延速度一般为137~173hm2·h-1,可为以后的林火预报提供参考指标。更多还原

【Abstract】 A serious fire accident event occurred and spread in camphor wood forest in Honggolj, Hulun Buir, Inner Mongolia in May 16, 2006. The weather conditions of the event are analyzed synthetically based on the meteorological data, the meteorological satellite and GIS data. The result indicates that (1) the high temperature and less rainfall with serious droughty and gale are the important conditions for the event occurrence; (2) The calculated synthetic indexes of forest combustibility are 395 and 423, that build a fire for lightning stroke according with practical situation; (3) The spread speed in fire field was 137.2hm2/h under force-four wind with the temperature in the range of 5.9—6.5℃; and the speed was 173.2hm2/h under force-five wind with temperature 7.6～8.4℃. (4) That speed is usually 137～173 hm2/h under the varying range of force 4-5 wind and 5.9～8.4℃ temperature.更多还原