林火蔓延模型研究及应用开发

Research of Forest Fire Spread Models and the Development of Simulation Module

利用惠更斯原理进行林火蔓延模拟,结合国际上成熟的林火行为模型(Rothermel的地表火模型,Van Wagner的树冠火蔓延模型,McAlpine的林火加速模型),建立适合云南省特殊地形的林火蔓延动态模型,并开发相应的动态模拟模块,在云南特殊地形地貌上的林火蔓延模拟做出一定探索。通过修改成熟的蔓延模型进行林火蔓延模拟达到模型预测的目的,并反映林火蔓延的主要规律。实验结果证明矢量的模拟方法是集成单个的地表火、树冠火、加速、飞火和可燃物含水率模型的更实际的技术。模型的集成简单易懂,因为每个模型的计算可以直接应用到火头的节点模拟上,然后控制所有模型的空间和时间分辨率。

The article incorporates Huygens＇ principle with existing fire behavior models of surface fire spread, crown fire spread, fire acceleration, builds forest fire simulation models which fit to Anning＇ s terrain, and develops related dynamic modules for Yunnan Province. The experiment explores the spread of forest fires based on the Yunnan＇s special topography simulation. Using the huygenst principle, the modules revise the spread of forest fire spread model, and predicts the purpose of the forest fires and the spread of the main laws. The experimental results show that the vector simulation method practically integrated single surface fire spread, crown fire spread, fire acceleration, fuel - fire and fuel moisture. The models are straightforward, because the calculation of each model can be directly applied to the nodes attempting simulation, and then control all model of spatial and temporal resolution.