基于大气污染扩散模型的空气污染多维动态可视化表达研究

摘要

To solve the problems that the existing methods for visualizing air pollution can not effectively integrate geographic information and can not achieve good visual effects and high-dimension information,a research on multi-dimensional dynamic visualization of air pollution in a three-dimensional space was done,based on the simulation results of the atmospheric pollution dispersion model,and a scheme for multi-dimensional dynamic visualization of air pollution was proposed.Five key technologies for visualization of air pollution,named as three-dimensional geographic scene construction for studying of air pollution,color mapping of pollution concentrations,slices-based visualization of air pollution,cubes-based visualization of air pollution and visualization of air pollution based on any vertical line or vertical plane,were described in detail.A prototype system was developed to implement five spatial and temporal visualization approaches for air pollution in the Pearl River Delta.The results prove that with the technologies addressed in this paper,high-precision and large-scale geographic information can be effectively integrated,a good visualization of air pollution can be achieved,the spatial and temporal distribution of air pollution can be effectively reflected and effective decision supports for air pollution management can be provided.%针对现有空气污染可视化表达方法不能有效集成地理信息、可视化效果差、信息维度低的问题,基于大气污染扩散模型模拟计算结果进行了三维空间空气污染多维动态可视化表达研究,提出了空气污染的多维动态可视化表达方案,详细论述了空气污染研究区域三维地理场景构建、污染浓度值与颜色的映射、基于切片的空气污染表达、基于立方体的空气污染表达、任意垂直线/面的空气污染表达等5种空间污染可视化表达方法与关键技术.最后以珠三角空气污染扩散模拟为例,开发了原型系统,进行了5种时空可视化表达与分析试验.试验结果表明,所采用的技术方案能够有效集成高精度大范围地理信息,能实现较好的空气污染可视化表达效果,能有效反映空气污染的时空分布,可以为空气污染管理人员提供有效的决策支持.