Forest Fire Pattern And Evaluation Of Forest Fire Suppression Capacity In Jilin Province

Based on the study on the spatial-temporal distribution pattern of forest fire in Jilin province with the forest fire data from 1992 to 2008 using ArcView,ArcMap and SPSS softwares, the relationship between forest fire loss and rate of spread was analyzed to evaluate the suppression capability of forest fire. Results show that:(1) The fire occurrences and area burned by per 10-year periods from 1950 to 2009 in Jilin province present a pronounced downward trend. Forest fire occurrence shows a little increase since 2000, but most are forest fire alarms.(2) The forest fire in Jilin province shows obvious seasonal change. Forest fire occurs mainly in spring and autumn, especially in spring. The fire occurrences in spring from 1992 to 1998 take up 78% of the whole, and area burned takes up 90.3%.(3) Forest fire occur frequently in April, May and October, whose total fire occurrences take up 82.73% of the whole. April has the most fire occurrences, which take up 42.89% of the whole from 1992 to 1998. Accumulated area burned by forest fire in Aprils takes up 56.18% of the whole and accumulated economic loss takes up 39.21%.(4) Forest fire occurred frequently in the middle and eastern part of the province from 1992 to 1998. This region includes Yanbian Korean Autonomous Prefecture, the northern part of Wangqing County, Tonghua City, Ji'an City and so on. Dunhua City and Antu County in Yanbian Korean Autonomous Prefecture are the area where forest fire occurs most and have much area damaged.(5) The average duration of each forest fire from 1992 to 1998 in the province is 2.86 hours. There are 66 times of forest fire whose duration is over 5 hours, taking up 8% of the total times. The economic loss caused by them is 7.5384 million, taking up 28.3% of the total loss.(6) There is significant correlation between forest fire losses and average area burned per hour (r=0.87), average area burned can replace fire rate of spread as the index to evaluate the fire speed for it is easy to obtain in complicated actual situation and can reflect the suppression ability precisely.