Fluxes of selected trace metals from the Seine estuary to the eastern English Channel during the period August 1994 to July 1995
Identifieur interne : 001127 ( France/Analysis ); précédent : 001126; suivant : 001128Fluxes of selected trace metals from the Seine estuary to the eastern English Channel during the period August 1994 to July 1995
Auteurs : Jean-François Chiffoleau [France] ; Dominique Auger [France] ; Emmanuelle Chartier [France]Source :
- Continental Shelf Research [ 0278-4343 ] ; 1999.
Abstract
Two sampling cruises conducted in the Seine estuary (France) under low-water and flood conditions produced high resolution profiles for dissolved cadmium, lead, copper, zinc and nickel concentrations versus salinity. The distribution of dissolved trace metals differed depending on hydrologic conditions, partly because of the dilution of upstream inputs during flood periods. Daily fluxes of these dissolved trace metals were estimated for the two sampling periods (September 1994 and February 1995) by extrapolating the dilution lines observed in higher salinity waters to salinity=0 and then multiplying the effective freshwater concentrations thus obtained by the corresponding freshwater flow. Several procedures were subsequently applied to deduce each daily flux for the year studied from data for these two periods. A consensus was found among these procedures, allowing the determination of net fluxes of dissolved trace metals with a precision of 20–35%. The net fluxes thus estimated were 4Tyr−1 for Cd, 4Tyr−1 for Pb, 40Tyr−1 for Cu, 130Tyr−1 for Zn and 50Tyr−1 for Ni.
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DOI: 10.1016/S0278-4343(99)00053-9
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The distribution of dissolved trace metals differed depending on hydrologic conditions, partly because of the dilution of upstream inputs during flood periods. Daily fluxes of these dissolved trace metals were estimated for the two sampling periods (September 1994 and February 1995) by extrapolating the dilution lines observed in higher salinity waters to salinity=0 and then multiplying the effective freshwater concentrations thus obtained by the corresponding freshwater flow. Several procedures were subsequently applied to deduce each daily flux for the year studied from data for these two periods. A consensus was found among these procedures, allowing the determination of net fluxes of dissolved trace metals with a precision of 20–35%. 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