The Research Method On Industrial Park And Pollutants Scenairo Simulation Implementation

Accompanied by the rapid development of virtual reality technology,3Stechnology, computer technology, database technology, Internet technology and otherIT, digital City has been transformed from theoretical study into reality construction.After years of exploration and development, digital city has entered a mature stage,with the guidance of a scientific theory and advanced technical support.. Its directionhas been from the macro-space geospatial information-based systems into thethree-dimensional simulation system for professional applications.Based on virtual reality technology,3S technology, computer technology,database technology, Internet technology and other IT and typical pollutant diffusionmodel Gaussian model and the Pasquill-Gifford model are combined to establish theChemical Industry Park of Huaqiao Industrial Park Digital Park3D simulation system.Basic geospatial data provided by the Park Administrative Committee as a geo-spatialbasic data,3D Max, Creator, SketchUp modeling techniques are combined toestablish the industrial park terrain, buildings, structures, sketch, flowers, trees, etc.virtual three-dimensional entities model gives to the real map, and then through thelight and shadow information baking, add lighting effects to the scene, the wholescene gives immersive realism. Data management, classification of different datatypes, and to establish a unified model data standards, the use of the pyramid imagesegmentation technique to partition the data into a block management to facilitate fastdata call. Features modular design of the system to the practical application of thepark as a starting point, design a3D scene browsing, multi-source data managementscheme comparison, planning module, and chemical incidents Emergency Commandand other modules. Chemical emergency command module take full account of thenature of production of the chemical industry park based on a combination ofmathematical models and particle systems of the Gaussian model and Pasquill-Giffordmodel, three-dimensional simulation of a typical pollutant dispersion mechanism, theGaussian model and Pasquill-Giffordthe model is internationally recognized for twoof the heavy gas and heavy gas description of a typical pollutant dispersionmechanism of one of the most effective model. Diffusion source based on the physicaland chemical properties of pollutants, as well as the diffusion of atmospheric stability,wind speed and direction, surface conditions and other external conditions determinethe simulation parameters, specify the pollution sources, according to the degree ofinjury of the pollutants on the human body in space delineated different scope, thefinal particle system, respectively, three-dimensional simulation of Gaussian modeland the spatial form of the Pasquill-Gifford model, space planning layout for theChemical Industry Park to provide decision support to avoid a potentially dangeroussource distribution infrastructure and the flow of relatively concentrated area for thechemical emergency command of the park to provide reliable scientificdecision-making, and effectively reduce the casualties and property damage caused bychemical accidents.