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Abstract:

On présente un modèle de diffusion atmosphérique pour des polluants émis en zone urbaine par des sources multiples. On considère l'équation de continuité de la masse et les profils de vent habituels dans la couche limite. On suppose que la distribution verticale des polluants est représentée par une forme polynomiale. Les coefficients du polynôme dépendent des conditions de stabilité atmosphérique. On prend comme hauteur limite supérieure du panache une fonction potentielle de la distance. On compare les estimations de la concentration normalisée aux valeurs obtenues avec le modèle urbain de Gifford-Hanna. Il y a une bonne concordance entre les deux modèles en conditions de stabilité atmosphérique. Les différences augmentent en conditions d'instabilité. L'analyse de la sensibilité du modèle montre que des variations relatives de la rugosité du sol ont peu d'effet sur les valeurs de la concentration calculée. Les variations de l'exposant de la fonction potentielle prise pour le sommet du panache deviennent plus critiques avec la distance. Les distributions de la concentration au sol calculées par le modèle pour Nashville (E.U.), Bremen (R.F.A.) et Frankfort (R.F.A.) sont en bon accord avec les valeurs observées. On obtient un indice de concordance de 0,983 et une erreur relative moyenne de 0,0408 entre les valeurs calculées et observées. © 1991.

Registro:

Documento: Artículo
Título:Air pollution model for an urban area
Autor:Mazzeo, N.A.; Venegas, L.E.
Filiación:Department of Meteorology, Faculty of Sciences, University of Buenos Aires, Ciudad Universitaria Pab. II, 1428 Buenos Aires, Argentina
Palabras clave:diffusion model; mass continuity equation; pollution model; urban area; wind profile
Año:1991
Volumen:26
Número:2
Página de inicio:165
Página de fin:179
DOI: http://dx.doi.org/10.1016/0169-8095(91)90031-Q
Título revista:Atmospheric Research
Título revista abreviado:Atmos. Res.
ISSN:01698095
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01698095_v26_n2_p165_Mazzeo

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Citas:

---------- APA ----------
Mazzeo, N.A. & Venegas, L.E. (1991) . Air pollution model for an urban area. Atmospheric Research, 26(2), 165-179.
http://dx.doi.org/10.1016/0169-8095(91)90031-Q
---------- CHICAGO ----------
Mazzeo, N.A., Venegas, L.E. "Air pollution model for an urban area" . Atmospheric Research 26, no. 2 (1991) : 165-179.
http://dx.doi.org/10.1016/0169-8095(91)90031-Q
---------- MLA ----------
Mazzeo, N.A., Venegas, L.E. "Air pollution model for an urban area" . Atmospheric Research, vol. 26, no. 2, 1991, pp. 165-179.
http://dx.doi.org/10.1016/0169-8095(91)90031-Q
---------- VANCOUVER ----------
Mazzeo, N.A., Venegas, L.E. Air pollution model for an urban area. Atmos. Res. 1991;26(2):165-179.
http://dx.doi.org/10.1016/0169-8095(91)90031-Q