期刊名称：American Journal of Geographic Information System
印刷版ISSN：2163-1131
电子版ISSN：2163-114X
出版年度：2013
卷号：2
期号：4
页码：82-92
DOI：10.5923/j.ajgis.20130204.02
语种：English
出版社：Scientific & Academic Publishing Co.
摘要：Smoke Plume is a pollutant produced by large scale bushfire. However, effectively modelling a large scale dispersion of smoke plume has not been reported. In this research, a novel method has been proposed. Modelling is based on Digital Elevation Model integrating with meteorological parameter. The smoke plume is treated as massive fine particles. Their absolute and relative motions over landscape are determined by setting up different spatial coordinates. In order to establish the correlation between their spatial positions and elevation of digital elevation model, several new concepts have been introduced. Smoke plume is portioned into a series of sub-volume locating on the dynamic center of mass. The concept of domain not only confines the region of smoke plume projected onto the surface of terrain correlating it with elevation but also describes the spread of bushfire on the ground and details spatial diffusion of smoke plume. The elapsed time is also redefined according to specific physical meaning to illustrate how smoke plume disperse simultaneously accompanying with bushfire spread. Several proposed delay coefficients is used to consider the viscosity of smoke plume and describe how fast smoke plume disperses in three-dimensional space. Obtaining physical properties of smoke plume is achieved by conversion of coordinates. The technique of linear indexing is fully applied into all processes occurring in bushfire spread and accurately control them in the process of data and information transfer. Modelling has been classified into two parts. In the part1, the focuses are on explaining some introduced concepts in detail.
