Sedimentation rate variations and anthropogenic metal fluxes into Lake Constance sediments |
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| Authors: | J Dominik A Mangini F Prosi |
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| Institution: | 1. Institut für Sedimentforschung und Institut für Umweltphysik, Universit?t Heidelberg, Heidelberg, West Germany
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| Abstract: | Sedimentation rates were determined by210Pb in three sediment cores from the main basin of Lake Constance. Rates vary from 0.094 to 0.133 g cm?2y?1, in agreement with previous determinations. A constant radionuclide flux (CR) model reveals long-term, quasi-synchronous fluctuations of sedimentation rate on the basin-wide scale. On average, the rate of sedimentation remains much the same from the beginning of this century indicating little effect of human activity in the watershed on fine-silt sediment supply. The anthropogenic fluxes of Zn, Pb, and Cd in the three cores are compared and the application of210Pb as a heavy metal tracer in Lake Constance is examined. It seems to be a very good tracer for Pb, moderately good for Zn and Cu, and not useful for Cd. |
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