Particles and associated metals in road runoff during snowmelt and rainfall

摘要: Abstract This study analysed road runoff in northern Sweden with respect to the concentrations of and loads particles different size fractions (4–6, 6–9, 9–15, 15–25, 25–40, 40–120 μm) between a snowmelt period rainfall period, as well during events within each period. There are also comparisons transport particle sizes two periods discussions on how metals associated varying sizes. The results showed, average, eight times higher five compared rain for all intervals. Using t-test 14 degrees freedom, at 90% 95% confidence level, mean- event mean intervals were melt Also, both decrease increases. During important factors influencing availability material, intensity lateral flow particles, and, additionally, length dry weather events. investigated TSS highly correlated total Cd, Cu, Ni, Pb, Zn. correlations metal not significant.