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把四川建设成为长江上游生态屏障是四川省的一项重大战略决策。森林和草地资源防火是生态屏障和生态安全保障体系建设的重要内容。林草火险等级的评价对森林和草地资源的防火具有重要的意义。本文利用遥感、GIS和层次分析法对四川省林草火险等级进行了评价。研究表明,就全省而言,火险等级为5级的占0.8%,为4级的占20.2%,为3级的占47.2%;极高火险区主要出现在甘孜州、凉山州、阿坝州、攀枝花市和雅安市,其所占面积百分比分别为49.2%、24.7%、15.7%、3.5%和3.4%;高火险区主要出现在甘孜州、凉山州和阿坝州,其所占面积百分比共达到了72.1%。建议将甘孜州、凉山州、阿坝州、攀枝花以及雅安市作为四川省林草防火的重点区域,在防火的人、财、物上给予优先考虑。
Building Sichuan into an ecological barrier in the upper reaches of the Yangtze River is a major strategic decision in Sichuan Province. Fire prevention of forest and grassland resources is an important part of the construction of an ecological barrier and ecological security system. The assessment of forest grass fire rating is of great significance to fire prevention of forest and grassland resources. In this paper, the remote sensing, GIS and AHP were used to evaluate the forest fires in Sichuan Province. The study shows that, for the whole province, the fire insurance rank is Grade-5 0.8%, Grade-4 20.2% and Grade-3 47.2%. The extremely high-risk areas mainly appear in Ganzi, Liangshan and Aba , Panzhihua City and Ya’an City accounted for 49.2%, 24.7%, 15.7%, 3.5% and 3.4% of the total area respectively. The areas with high fire risk mainly occurred in Ganzi, Liangshan and Aba areas, with a total area percentage of Reached 72.1%. It is suggested that Ganzi Prefecture, Liangshan Prefecture, Aba Prefecture, Panzhihua City and Ya’an City should be given priority in fire prevention and fire prevention as a key area for forest and grass fire prevention in Sichuan Province.