基于数字地球的林火灾害建模  

Forest Fire Disaster Modeling Based on Digital Earth

作　　者：吴玲达[1,2] 曹叡 杨超 蒋杰[2] 

机构地区：[1]装备学院重点实验室,北京101416 [2]国防科学技术大学信息系统工程实验室,长沙410073

出　　处：《计算机工程》2012年第17期261-264,共4页Computer Engineering

基　　金：国家"863"计划基金资助项目(2009AA01Z335);国家部委基金资助项目

摘　　要：针对数字地球上林火灾害可视化问题,建立林火灾害仿真可视化框架。设计蔓延表现算法,采用Rothermel火行为计算模型和邻接单元蔓延模型。提出一种网格均匀划分的简化模型,进行仿真实验。结果表明,该方法能在数字地球上表达林火蔓延过程,较好地描述林火蔓延物理机理,为三维地理环境上的灾害分析提供辅助支持。According to the problem of forest fire disaster visualization based on digital earth, forest fire simulation visualization framework is established. Specific spread rendering algorithm is designed, adopting Rothermel fire behavior model and contiguous cellular spread model. An equiangle mesh generation simplification model is proposed. Simulation experiment is carried out. The result indicates the proposed model can simulate forest fire spread process on digital earth and well describe fire spread physics mechanism, which provides disaster analysis and decision support in three-dimensional geographic environment.

关 键 词：数字地球 林火灾害 Rothermel模型 邻接单元模型 网格划分 等角投影 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]