黑龙江省夏季林火蔓延特点

通过对2001-2007年黑龙江省夏季森林火灾调查研究发现,该地区夏季林火种类有地表火、地下火、树冠火3种,这3种蔓延方式之间相互演变,多数为地表火与地下火同时存在。夏季林火蔓延速度普遍较慢,地表火蔓延速度大多在0.05m/s以下;浅层地下火在有林地的燃烧速度为2-4m/h、草甸为1-3m/h,深层地下火在有林地的燃烧速度为0.2m/h以下、草甸为0.05m/h以下;树冠火蔓延速度一般为180-600m/h。

Characteristics of Summer Forest Fire Spread in Heilongjiang Province

Through the research of Heilongjiang summer forest fire from 2001 to 2007,there were 3 types fire in this area:surface fire,ground fire,crown fire,which can transform each other,mostly are surface fire and ground fire.Summer forest fire spreads slowly,whose spread speed was mostly below 0.05m/s,the burning rate of superficial ground fire which in forest was 2~4m/h,in grass was 1~3m/h,the burning rate of underground fire which in forest was below 0.2m/h,in grass was below 0.05m/h.The spread speed of crown fi...