Forest and grassland as an important part of ecosystem,fire prevention work has always been the most important work;this article is based on data,use of quantitative and qualitative analysis,classify Changbai Mountain areas of the fire hazard rating,which can be as the guidance of a good fire prevention work.Changbai Mountain Nature Reserve in August 28,1986,the territory of protected areas are the south-west and the western slope,the time in minutes,many trees in 750-2000m above sea level were down from,and from the wide leaf Korean pine forest,spruce-fir forest to wind and rewind ermanii forest,the wind hit the scope of the total area of the occurrence 9924hm~2.At present,restoration of vegetation response through a number of trees to restore an area of wind hit the wind down zone for 11 percent,accounting for half of the restoration area zone wind down 8 percent, not accounting for the resumption of the wind area of the district was 81%,most have become distributed in the cloud fir forest trails Lauraceae lobular ground-based community of herbaceous plants,meadow and the formation of forest landscape was not only severe damage,and increased the level of wind hit the fire,a serious threat to the safety of the forest,so the wind disaster area significant fire division.In this paper,I through the support of GIS technology to remote sensing technology to support the principle of the use of risk assessment,application-level analysis of forest fire on the study area had a quantitative evaluation of grade.I selected areas of the Changbai Mountain Nature Reserve,the vegetation type,slope,aspect,climatic factors,such as the study area as the fire impact factor,the application of AHP to determine the final weighting factor using factor-weighted overlay method,the study area on level of forest fire situation quantitative evaluation will be graded fire.At the same time,by the use of remote sensing software patch and landscape site type combination of analysis,mapping and analysis of wind hit,with a view to the future of the region's forest fire forecasting and scientific management to provide decision-making and technical support.Fire hazard rating and will highlight the type of map in the site through analysis and factor-level rating law,can be divided into the wind hit the fire rating:slope> 25°of the sunny,with grass,Korean pine forest,the main target of Yang Hua Lin,fire hazard rating of grade I,or the wind hit the 68.98%,II grade slope region 15-24°, elevation<1100m semi-sunny or semi-slope to Birch,shrubs,broad-leaved forest dominated,accounting for the wind areas of 22.04%,III grade fire district gradient <15°,elevation 1100-1800m in the slope or half-slope to Feng-hua,and spruce-fir forest,deciduous broad-leaved forest mainly accounted for 8.98 percent of the wind hit.
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