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Abstract(s)
This paper describes the methodology adopted to assess local air quality impact in the
vicinity of a coal power plant located in the south of Portugal. Two sampling areas were selected to assess
the deposition flux of dust fallout and its potential spatial heterogeneity. The sampling area was divided
into two subareas: the inner, with higher sampling density and urban and suburban characteristics, inside
a 6-km circle centered on the stacks, and an outer subarea, mainly rural, with lower sampling density
within a radius of 20 km. Particulate matter deposition was studied in the vicinity of the coal fired power
plant during three seasonal sampling campaigns. For the first one, the average annual flux of dust fallout
was 22.51 g/(m2 yr), ranging from 4.20 to 65.94 g/(m2 yr); for the second one was 9.47 g/(m2 yr), ranging
from 0.78 to 32.72 g/(m2 yr) and for the last one was 38.42 g/(m2 yr), ranging from 1.41 to 117.48 g/(m2
yr). The fallout during the second campaign turned out to be much lower than for others. This was in part
due to meteorological local patterns but mostly due to the fact that the power plant was not working at full
power during the second sampling campaign.155
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American Academy of Sciences