摘要
利用GIS和SPSS统计软件,对塔河林业局1975—2004年的林火和气象数据进行处理,在时空尺度上分析了30a该区的林火规律,引入湿润指数来反映大兴安岭地区水热状况指标,并采用模糊聚类分析法对春、夏、秋3个季节森林火险等级进行划分。研究结果表明:30a研究区火灾总次数和过火面积均呈波动上升趋势;用湿润指数表征森林火灾在春、夏、秋3个季节的气象条件是可行的;春季是森林火灾的高发期,夏季发生森林火灾的可能性也较大,秋季相对无高森林火险等级。该地区的森林防火工作不能简单地套用黑龙江省普遍实行的春秋2季为防火期、夏季为防火安全期的做法,也要提高对夏季森林防火工作的重视。
The forest fire regime was analysed in spatial-temporal scale using the forest fire data and meteorological data for Tahe Forestry Bureau during 1975 and 2004 with the help of GIS and SPSS. Humidity index was chosen to analyse the relationship between forest fire and meteorological conditions by the minimal error method. Forest fire danger rating was classified according to spring, summer and autumn by the fuzzy cluster method. Results showed that the total fire frequency and the burned area exhibited increasing tendencies for the past 30 years. It is reasonable to use humidity index to denote meteorological conditions in spring, summer and autumn. Spring is the most dangerous fire season, the possibility of forest fire is high in summer, and the fire danger rating is low in autumn. It is wrong to think that forest fires take place only in spring and autumn in Heilongjiang Province, and the work of forest fire prevention should be enhanced in summer.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2007年第8期23-25,27,共4页
Journal of Northeast Forestry University
基金
黑龙江省重点基金项目(ZJD04-0102)
基于RS的森林火险预报技术研究项目。
关键词
大兴安岭
林火
湿润指数
森林火险
Daxing＇ an Mountains
Forest fires
Humidity indexes
Forest fire danger
