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fire spreading model
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At Wuyishan Biosphere Reserve in Fujian province,the subtropical natural ecosystems and natural landscapes are emphatically protected. In order to strengthen the protection system against forest fire in this region,the systems of forest fire prediction and monitoring are systematically designed based on an analysis of the present situation of forest fire protection and a building-up of the geographic information system. The modern forest fire control system.forest fire danger degrees...

At Wuyishan Biosphere Reserve in Fujian province,the subtropical natural ecosystems and natural landscapes are emphatically protected. In order to strengthen the protection system against forest fire in this region,the systems of forest fire prediction and monitoring are systematically designed based on an analysis of the present situation of forest fire protection and a building-up of the geographic information system. The modern forest fire control system.forest fire danger degrees and fires distribution are disposed and the fire spread model is imitated. This study provides a reliable basis for modern forest fire control,equipment disposition of fire protection and appraisement of fire losses.

武夷山生物圈保护区,是以保护亚热带森林生态系统和自然景观为主的保护区.为了搞好该区的森林防火工作,在建立保护区地理信息系统、分析其护林防火现状的基础上,对其森林火灾预防监测体系进行了系统设计,对现代林火管理系统、火险等级及分布、森林火灾蔓延模型等进行了模拟和设置,为现代林火管理、防火设施配制及火灾损失评估等提供了系统分析的依据.

For the purpose of study on forecasting forest fire behavior and the visualization of fire spreading simulation, the article is concentrated on analyzing different kinds of forest fire spread models and their application conditions based on setting forth some influencing factors such as fuels, topography and wind. It is referred that choosing a specified model will play an important role in forecasting the actual fire field. In screening fire spreading model, the four basic principles are put forward....

For the purpose of study on forecasting forest fire behavior and the visualization of fire spreading simulation, the article is concentrated on analyzing different kinds of forest fire spread models and their application conditions based on setting forth some influencing factors such as fuels, topography and wind. It is referred that choosing a specified model will play an important role in forecasting the actual fire field. In screening fire spreading model, the four basic principles are put forward. Those are the function of model, the topography and fuels of model, the model's individual characteristics and the frequency of model and its testimony. It is pointed out that the focus on forest fire behavior is simulating the forest fire spreading on the GIS.

为了研究林火行为的预测预报及林火蔓延模拟的可视化问题 ,该文在分析了林火蔓延及其影响因子的基础之上 ,阐明了几种林火蔓延模型及其适用性 ,评述了选用不同的林火蔓延模型对实际火场的预测预报具有的重要理论意义及实用价值 ,初步分析了蔓延模型选择的 4个基本出发点 :模型的功能、模型适用的地区和植被类型、模型的假设条件、模型的检验频数等 .在假定已有蔓延模型的基础上 ,分析了国内外林火蔓延研究的发展状况 ,指出了在林火蔓延模型的基础上以地理信息系统为平台的林火蔓延模拟已成为林火行为预测预报的主要方向 ,同时讨论了林火蔓延模型和蔓延模拟的发展前景

Several popular fire spread models were described. Based on the analysis of heat transfer, a physical and mathematical model was concluded to describe the fire spread across a fuel bed under slope effect. Some linear, partial differential equations with initialand boundary conditions were developed for numerical simulation. Furthermore, the courses of fire spread in small slope were simulated in fuel bed. Through the experimental data recorded by thermocouples, the relationship...

Several popular fire spread models were described. Based on the analysis of heat transfer, a physical and mathematical model was concluded to describe the fire spread across a fuel bed under slope effect. Some linear, partial differential equations with initialand boundary conditions were developed for numerical simulation. Furthermore, the courses of fire spread in small slope were simulated in fuel bed. Through the experimental data recorded by thermocouples, the relationship among ROS (rate of fire spread), temperature field and slope was found and discussed with different figures. Finally, results of experiment and numerical simulation were compared and analyzed. The model can be used to discover the law of fire spread. Some other conclusions on fire spread are also drawn. For example, upslope fire can accelerate the course of fire spread and translation and so on. 

表述了几种常见的火蔓延模型,在传热分析的基础上,建立了一个比较理想的物理和数学模型,导出了描绘坡度火蔓延过程的微分方程及其初始、边界条件,并进行了数值计算.在燃料床上模拟了坡度地表火蔓延过程,通过对实验数据的测取和分析,讨论了火蔓延速率和温度场分布等随坡度大小变化的关系.最后将实验结果和理论计算结果对比分析,发现该模型能够揭示火蔓延规律,同时也得出了一些关于林火蔓延的结论,如上坡火能够加速火的蔓延和转化等.

 
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