Distribution and correlation analysis of wildfire and weather data in Japan

To establish the wildfire danger rating system, detailed data of wildfire and some related parameters such as weather,population and tree species are required. In this paper, the raw data of weather parameters in Japan are first expanded into more detailed data. The daily value of each weather parameter in each third-level mesh, which is about 1 km × 1 km in size, from year 1999 to 2000 is calculated by means of inverse distance weighted interpolation. Expansion results for third-level meshes are demonstrated. Fire probability for each parameter is calculated and analyzed. It is found that the dependency relation of fire probability on some parameters have surprisingly regular format. The data calculated and analyzed in the paper and the results may act as a basic database for wildfire researchers, and are expected to promote the study of wildfire danger rating method and the development of such systems.     

自组织临界性与大规模森林火灾的防治

对经典的自组织临界性森林火灾模型进行了数值模拟,在此基础上,重点对我国1960,1970,1980和1987年前后,以及日本1995年前后的森林火灾发生情况进行了比较,分析了大规模森林火灾的发生频率与中小型森林火灾之间的联系.结果表明森林火灾模型可以描述森林火灾系统的自组织临界性,并与真实的森林火灾数据符合得较好.森林火灾系统的自组织临界性对火灾防治有一定的指导作用.