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森林是生态系统的重要组成部分,是人类生存和可持续发展的宝贵资源。一旦发生森林火灾,将给森林生态系统和人类生命财产带来重大损失。通过分析渗透理论的思想,提出了基于二维渗透网格的森林火灾蔓延模型和相应的仿真算法,用来模拟森林树木的分布情况以及林火蔓延过程。理论分析与仿真实验结果表明,当网格单元处于开状态的概率接近0.6时,存在最大渗透簇。提出的模型较好地反映了森林分布密度对于火灾蔓延的影响规律,能对森林防火演练、火灾扑救、灾后损失评估以及森林资源管理起到一定的指导作用。与以往同类算法相比,提出的仿真算法降低了时间复杂度,算法效率有较大提高。
Forests are an important part of ecosystems and a valuable resource for human survival and sustainable development. In the event of a forest fire, it will cause significant losses to forest ecosystems and human lives and property. By analyzing the theory of infiltration theory, a model of forest fire spread based on two-dimensional infiltration grid and the corresponding simulation algorithm are proposed to simulate the distribution of forest trees and the spread of forest fires. The theoretical analysis and simulation results show that when the probability that the grid cell is in the open state is close to 0.6, the maximum infiltration cluster exists. The proposed model can better reflect the influence of forest distribution density on the spread of fire and can guide forest fire prevention exercises, fire fighting and extinction, post-disaster loss assessment and forest resource management. Compared with other similar algorithms, the proposed algorithm reduces the time complexity and improves the efficiency of the algorithm.