title: Optimizing the calculation grid for atmospheric dispersion modelling.
abstract: This paper presents three approaches to find optimized grids for atmospheric dispersion measurements and calculations in emergency planning. This can be useful for deriving optimal positions for mobile monitoring stations, or help to reduce discretization errors and improve recommendations. Indeed, threshold-based recommendations or conclusions may differ strongly on the shape and size of the grid on which atmospheric dispersion measurements or calculations of pollutants are based. Therefore, relatively sparse grids that retain as much information as possible, are required. The grid optimization procedure proposed here is first demonstrated with a simple Gaussian plume model as adopted in atmospheric dispersion calculations, which provides fast calculations. The optimized grids are compared to the Noodplan grid, currently used for emergency planning in Belgium, and to the exact solution. We then demonstrate how it can be used in more realistic dispersion models.
authors: KU Leuven, CIB, Celestijnenlaan 300, Box 2422, 3001 Leuven, Belgium. Electronic address: sofie.vanthielen@kuleuven.be.
authors: S
authors: S
authors: Van Thielen
authors: SCK•CEN, Belgian Nuclear Research Centre, Boeretang 200, 2400 Mol, Belgium.
authors: C
authors: C
authors: Turcanu
authors: SCK•CEN, Belgian Nuclear Research Centre, Boeretang 200, 2400 Mol, Belgium.
authors: J
authors: J
authors: Camps
authors: KU Leuven, Department of Mathematics, Celestijnenlaan 200B, 3001 Leuven, Belgium.
authors: R
authors: R
authors: Keppens
mesh_terms: D000392:Air Movements; D000396:Air Pollutants, Radioactive / Q000032:analysis*; D001530:Belgium; D008962:Models, Theoretical; D016011:Normal Distribution; D011834:Radiation Monitoring / Q000379:methods*
chemical_list: D000396:Air Pollutants, Radioactive
keywords: Atmospheric dispersion; Heuristics; Optimization