Extended Abstract (2.0M)J5.1
Urban dispersion - challenges for fast response modeling
Michael J. Brown, LANL, Los Alamos, NM
Transport and diffusion of an airborne contaminant within a city is extremely complicated. Complex wind patterns develop as a function of building height variation, shapes, spacings, and relative layout. There are a number of groups involved in computational fluid dynamics modeling of city centers, but for many applications (e.g., emergency response, training, vulnerability assessments) a fast response model is required. To reasonably account for the effects of clusters of buildings on the flow fields in a simplified, non-full-physics model is extraordinarily challenging. In this presentation, we will illustrate some of the complexities of plume dispersion in cities, why accounting for urban effects is important, present a brief overview of urban fast response models, and through examples of model output illustrate pitfalls and successes of these models.
Joint Session 5, Fast Response Urban Dispersion Models (Joint between the Fifth Symposium on the Urban Environment and the 13th Conference on the Applications of Air Pollution Meteorology with the A&WMA)
Wednesday, 25 August 2004, 3:30 PM-4:45 PM
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