URBAN RUNOFF IMPACTS ON PARTICULATE METAL AND HYDROCARBON CONCENTRATIONS IN RIVER SEINE - SUSPENDED SOLID AND SEDIMENT TRANSPORT

Particulate heavy metals and hydrocarbons have been measured in Paris urban area during dry and wet weather periods. A 18 months campaign re alised upstream Paris, in the river Seine, has evidenced higher heavy metals concentrations during summer than winter. Summer campaigns demo nstrate a strong impact of Paris urban area and its discharges. The di rect impact of highly polluted urban overflows into River Seine has be en evidenced as a weak immediate but significant retarded discharge of particulate toxic metals. Ratios of significant PAH's allows a better understanding of sources and transport of hydrocarbon in urban areas. Furthermore, relation of these impacts to those observed for heavy me tals brings useful information on effects of urban storm drainage. (C) 1997 IAWQ. Published by Elsevier Science Ltd.