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DUST GENERATION AND DISPERSION (PM10 AND PM2.5) IN THE AOSTA VALLEY: ANALYSIS WITH THE FARM MODEL
Giordano Pession
; ARPA Valle d’Aosta, Saint-Christophe, Italy
Tiziana Magri
; ARPA Valle d’Aosta, Saint-Christophe, Italy
Manuela Zublena
; ARPA Valle d’Aosta, Saint-Christophe, Italy
Giovanni Agnesod
; ARPA Valle d’Aosta, Saint-Christophe, Italy
Giuseppe Genon
; Politecnico di Torino, Torino, Italy
Laurent Blanc
; Politecnico di Torino, Torino, Italy
Camillo Silibello
; ARIANET s.r.l., Milano, Italy
Sandro Finardi
; ARIANET s.r.l., Milano, Italy
Giuseppe Calori
; ARIANET s.r.l., Milano, Italy
Alessandro Nanni
; ARIANET s.r.l., Milano, Italy
Sažetak
The aim of this work is to analyze the origin and the dispersion of the particulate matter (PM10 and PM2.5) in a
mountainous region: the Aosta Valley. To meet this goal, different simulations were performed, using the flexible air quality
regional model (FARM), to study two scenarios: winter and summer situations. To evaluate the performance of the FARM model in
order to simulate the air quality situation of the selected periods, a comparison of modelled results against observed air quality data
was carried out for both primary pollutants and particulate matter next to the measurement stations . Farm performed well in
simulating especially ozone (O3) and nitrogen dioxide (NO2) concentrations, showing a good reproduction of both daily peaks and
their daytime variations. PM model results revealed the tendency to under-predict the observed values, so we tried to use a different
emission factor for the road traffic (Lohmeyer factor). The new results were good for the urban and suburban areas, but they give
over-predictions close to highways. The PM characterisation provided by the model gives good results: in some different points of
the analysis domain (mountain, plain and urban points) we found PM profiles wich reproduce expected values.
Ključne riječi
Air quality modelling; urban and rural air pollution; traffic emission; chemical characterisation of PM10
Hrčak ID:
64327
URI
Datum izdavanja:
12.12.2008.
Posjeta: 815 *