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The influence of water motion on the distribution and transport of materials in a salt marsh estuary 1
Author(s) -
Imberger J.,
Berman T.,
Christian R. R.,
Sherr E. B.,
Whitney D. E.,
Pomeroy L. R.,
Wiegert R. G.,
Wiebe W. J.
Publication year - 1983
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1983.28.2.0201
Subject(s) - salt marsh , estuary , environmental science , marsh , tracer , dissolved organic carbon , decomposition , hydrology (agriculture) , water column , carbon fibers , ammonium , environmental chemistry , chemistry , oceanography , geology , wetland , ecology , materials science , physics , geotechnical engineering , organic chemistry , composite number , nuclear physics , composite material , biology
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.