An estuarine fine-particle budget determined from radionuclide tracers |
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Authors: | C R Olsen N H Cutshall I L Larsen H J Simpson R M Trier R F Bopp |
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Institution: | (1) Environmental Sciences Division, Oak Ridge National Laboratory, 37831 Oak Ridge, TN;(2) Department of Geological Sciences and Lamont-Doherty Geological Observatory, Columbia University, 10964 Palisades, NY |
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Abstract: | The sedimentary distributions of radiocesium and plutonium have been used to determine patterns of fine-particle accumulation, estimate net sediment fluxes from different sources, and develop a fine-particle budget for the Hudson-Raritan estuary. It is proposed that the rates and patterns of fineparticle accumulation reflect a sediment surface in dynamic equilibrium with the wave and current regimes. Rates of accumulation in most estuarine areas appear to equal the rate to sea-level rise or land subsidence. Localized areas, which have not yet attained or are presently out of equilibrium, serve as fine particle traps. |
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