基于森林火险指数的森林火险区划研究

Study on Forest Fire Risk Zone Based on Forest Fire Risk Index

以陕西周至国家级自然保护区为例,利用森林资源二类调查资料、DEM数据和地形图,借助GIS技术平台,选取地物类型(地类、优势树种)、地形因子(海拔高度、坡度、坡向)、交通区位和居民区距离作为计算森林火险指数(FFR)的主要因子,采用综合评价法,计算了周至国家级自然保护区的森林火险指数。根据计算的森林火险指数,把周至国家级自然保护区划分为5类火险区,即无火险、低火险、中火险、高火险和极高火险,其中,高火险区占48.9%,极高火险区占30.2%,高火险、极高火险等级所占面积较大。研究结果可为周至国家级自然保护区的森林火灾管理提供参考,达到防灾减灾,保护森林资源的目的。

Based on forest management planning and design inventory data,DEM data and topographic map of Zhouzhi National Nature Reserve,the forest fire risk index(FFR)was quantified by the factors in-cluding vegetation type,topographic factors(elevation,slope,aspect),traffic location and residential dis-tance.The Zhouzhi National Nature Reserve was regionalized by safe,low,moderate,high and extremely high fire risk zones according to forest fire risk index(FFR).Among them,high fire risk area accounted for 48.9%,extremely high fire risk zones accounted for 30.2%,high and extremely high fire risk accoun-ted for a larger area.The results can provide avaluable reference for forest fire management in Zhouzhi Na-tional Nature Reserve to achieve disaster prevention,mitigation and protection of forest resources.