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在现有的基于元胞自动机的林火蔓延模型的基础上,提出了元胞作用域的概念,将元胞自身属性与外界影响通过作用域的概念归纳为一个整体。建立的基于元胞作用域的林火蔓延模型不仅包括中心元胞的属性,如可燃物类型、气温等,还将邻居元胞的点燃系数、距离系数、风作用项及地形作用项纳入考虑范畴,其中距离系数以基于地图代数的障碍距离为基础,地形作用项则以DEM为基础求取。模拟结果表明,基于元胞作用域的林火蔓延模型能够真实地反映现实世界林火蔓延的过程。
Based on the current cellular automata-based forest fire spread model, the concept of cell-cell scope is proposed, and the concept of cell’s own properties and external influences through the scope is summarized as a whole. The established cell-based forest fire spread model not only includes the properties of central cells, such as combustibles types, temperature, etc., but also takes into account the ignition factors, distance coefficients, wind action terms and topographic effects of neighboring cells , Where the distance coefficient is based on the obstacle distance based on the map algebra and the topographic action term is based on the DEM. Simulation results show that the model of forest fire spread based on cellular scope can truly reflect the process of forest fire spread in the real world.