Bulg. J. Phys. vol.27 no.S3 (2000), pp. 053-056

Modeling of Atmospheric Flow Field: A Transport of Pollutants

M.M . Popović1, M. Dacić1, Z. Gršić2
1Institute of Physics, P.O.Box 57, Pregrevica 118, 11080 Zemun-Belgrade, Yugoslavia
2Institute for Nuclear Science ?Vinea?, P.O.Box 522, 11001 Belgrade
Abstract. There are various attempts to model accidental situations. Some provide fairly accurate results on the local scale (e.g. Gaussian puff model [1]), whereas others give good results on the regional scale [2-6]). The shortcoming of the first group of models is that their results are not applicable to the transboundary pollution transport studies. When one tries to model transboundary transport of pollution released on the local scale (point source) using regional models one faces a difficulty in adequately specifying the input source data. In this paper we comment on the feasibility of applying the regional Eta model to calculate the spread of the contaminant released from a single point. The modeling system is applicable to an accidental situation similar to the one that happened during the NATO bombing of the Yugoslav Petrochemical industrial complex in Pancevo. We advocate the use of the combined Gaussian dispersion model and the regional Eta model. The first should be used in the early stage of the accident helping in determination of the initial preferential plume direction and the second takes on afterwards and follows the life cycle of the plume including transboundary transport, wet and dry deposition, etc.

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