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Erschienen in:
2014 | OriginalPaper | Buchkapitel
114. Evaluation of a Plume-in-Grid Model for Line Sources with a Multiple Roadway Case Study
verfasst von : Régis Briant, Christian Seigneur
Erschienen in: Air Pollution Modeling and its Application XXII
Verlag: Springer Netherlands
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Abstract
Eulerian models, which are widely used in air quality modeling are based on a three dimensional grid in which emissions are released. Point sources are mixed in a cell that can be a few kilometers long and therefore in regional scale simulations, the approximation made by the model on the emissions can have a significant impact. Plume-in-grid (PinG) models combine an Eulerian and a plume or puff, typically Gaussian, model aiming at having a better representation of sources within grid cells. Although point sources are convenient to model dispersion from a chimney, line sources are better suited for roadway traffic pollution modeling. Here we present a new PinG model that uses Gaussian line source model embedded within the Eulerian model Polair3D. Emissions are treated as steady-state plumes released from line sources. After a description of the model we present here its application to a case study that includes multiple roadways.