基于ArcGIS的高原林火蔓延三维可视化系统

Three-dimensional Visualization System of Forest Fire Spread based on ArcGIS

利用云南省昆明市安宁地区2006年"3.29"重大森林火灾数据作为研究对象,在ArcGIS软件支持下,根据研究区域自动生成三维可视化地形图,搜集气象、植被、地形数据,选用Rothermel地表火蔓延模型,使用基于DEM栅格的元胞自动机林火蔓延算法,动态模拟林火蔓延过程。该系统三维可视化显示更加直观、形象,有助于灭火人员及时了解火灾蔓延动态,可以为林火预警、监测、分析、统计和应急预案的制定提供科学依据。

Forest is an important resource to the survival and development of human society,forest fire prevention is extremely important. Based on the real-time data of the "3. 29"major forest fire in 2006 in Anning district,Kunming,Yunnan province,after collecting the meteorological,vegetation and terrain data of the study area with the support of ArcGIS,and automatic generation of 3D visualization topographic map based on research area,this article uses the Rothermel surface spread model and a Cellular Automated Fire Spreading Algorithm based on DEM Grid,to develop dynamic simulation of forest fire spreading process. The visualization of the system is more directly perceived through the senses and visualized than before,which can help the firefighters to monitor the spread of fire in real time so to support the scientific reference for making the plan more effective.