We present the first results of a study aimed to use data retrieved from remote sensing as input to pollutants atmospheric dispersion models. These models require data on the local meteorological conditions and on the physical characteristics of the surface to model the dynamic of the first atmospheric layers. The surface parameters are usually assigned to a land use map on the basis of tables of reference mean values. Remotely sensed data can give a direct, up-to-date, spatially continuous information on some of these parameters. In this work we extract an empirical relation to calculate the surface albedo from Landsat 7 ETM+ images; the results are compared with reference mean values available from literature. The effects of the found differences on the model are evaluated by comparing maps of net radiation calculated with the equation used in the SPRAY dispersion model used at ISPESL.
Estrazione di parametri superficiali da immagini ETM+ per modelli di dispersione di inquinanti in atmosfera / Teggi, Sergio; M. P., Bogliolo; C., Gariazzo; Ghermandi, Grazia. - STAMPA. - (2001), pp. 1-6. (Intervento presentato al convegno 5a Conferenza Nazionale ASITA, La Qualità nell'Informazione Geografica tenutosi a Rimini nel 15 - 18 novembre 2005).
Estrazione di parametri superficiali da immagini ETM+ per modelli di dispersione di inquinanti in atmosfera
TEGGI, Sergio;GHERMANDI, Grazia
2001
Abstract
We present the first results of a study aimed to use data retrieved from remote sensing as input to pollutants atmospheric dispersion models. These models require data on the local meteorological conditions and on the physical characteristics of the surface to model the dynamic of the first atmospheric layers. The surface parameters are usually assigned to a land use map on the basis of tables of reference mean values. Remotely sensed data can give a direct, up-to-date, spatially continuous information on some of these parameters. In this work we extract an empirical relation to calculate the surface albedo from Landsat 7 ETM+ images; the results are compared with reference mean values available from literature. The effects of the found differences on the model are evaluated by comparing maps of net radiation calculated with the equation used in the SPRAY dispersion model used at ISPESL.
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