基于Rothermel模型的森林火灾模拟算法的改进

Improvement of the Forest Fires Simulation Algorithm Based on the Rothermel Model

我国是一个森林火灾多发的国家,森林火灾不仅破坏森林生态系统、造成林木资源损失,还会威胁到人民的生命财产安全。因此如何快速精确地模拟森林火灾的蔓延过程对于防灾减灾有重大的意义和作用,本文在深入对比了国内外各种森林火灾蔓延模型的基础上,选择了抽象程度较高、顾及因素全面的Rothermel火灾蔓延模型作为本文的应用模型,在模型的应用中改正了森林火灾范围割的缺陷,优化了多着火点同时蔓延时火灾边界计算方法,最终实现森林火灾模拟的功能,满足了森林火灾蔓延模拟实时高效的要求,为管理部门提供可靠的决策支持。

Forest fire has been happened frequently in China. Forest fires not only destroy the forest ecosystem, resulting in the loss of forest resources, but also are a threat to the safety of life anti property of the people. Therefore, how to quickly and accurately simulate the spread of h^rest fires is of great significance and role in disaster prevention and mitigation. Comparing all kinds of forest fire spread models at home and abroad, this paper selected Rothermel fire spread model as the application model, which have advantages of a high degree of abstraction and taking into accoun! factors comprehensive. During the application of the model, it corrected tile forest fire scope fragmented defect,Optimized fire boundary calculation method when the begin fire points catch fire at tbe same time. In this way, it can achieve the fire simulation function, meet the forest fire spread simulation of real-time and efficient requirements and provide reliable decision support for the management department.