The influence of water motion on the distribution and transport of materials in a salt marsh estuary1

Limnology and Oceanography - Tập 28 Số 2 - Trang 201-214 - 1983
J. Imberger1, T. Berman2, R. R. Christian3, Evelyn B. Sherr4, David E. Whitney4, L. R. Pomeroy5, Richard G. Wiegert5, W. J. Wiebe6
1Department of Civil Engineering, University of Western Australia, Nedlands, Western Australia 6009
2Kinneret Limnological Laboratory, Box 345, Tiberias, Israel
3Department of Biology, Drexel University, Philadelphia, Pennsylvania
4University of Georgia Marine Institute, Sapelo Island 31327
5Department of Zoology, University of Georgia, Athens 30602.
6Department of Microbiology, University of Georgia

Tóm tắt

A formal approach is presented of ordering the time scales of the dominant fluxes of material in an estuary and then accordingly choosing the spatial and temporal resolution of the sampling program. In this way bounds can be derived for the internal turnover times, boundary exchange rates, and import or export fluxes of a particular substance purely from measurements of the standing stock values in the estuary water.Application of this methodology to an experiment in the Duplin River, Georgia, showed that if the effects of the water motion and mixing are extracted from the variation of a biological component, then the variability of the residual can be successfully interpreted. For a typical summer condition it was shown that ammonium was cycled rapidly within the marsh water, its distribution was very patchy, and only its decomposition products left the marsh; that the refractory dissolved organic carbon (DOC) component was steadily exported by longitudinal mixing while labile DOC was rapidly recycled in the water; that silicate was produced in large amounts in the marsh and exported by longitudinal mixing; that particulate organic carbon (POC) concentrations were almost completely determined by the turbulence intensity in the water; and that compared to this internal cycling, export was of minor significance.

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Limnology and Oceanography

Tập 28 Số 2

201-214

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