Eutrophication and Nutrient Enrichment in Peconic Bay: Numerical Model of Historical Conditions of the Mid-1970s

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by M. Morton, Tetra Tech, Inc, United States,
A. Stoddard, Tetra Tech, Inc, United States,
J. Pagenkopf, Tetra Tech, Inc, United States,

Document Type: Proceeding Paper

Part of: Estuarine and Coastal Modeling

Abstract: In response to water quality and resource management issues triggered by the brown tide bloom of 1985-88 in the embayments of the Peconic estuary of Long Island, New York, a coupled hydrodynamic and water quality model has been developed to evaluate nutrient enrichment and eutrophication. Using data from 1976 for calibration, the model adequately reproduces the observed spatial and seasonal trends of CBOD, nutrients, chlorophyll, salinity and oxygen and indicates that the coupled model framework of DYNHYD4, WASP4 and EUTRO4 can provide an adequate characterization of eutrophication in the Peconic estuary. Key findings include the significance of tidal exchange and circulation on water quality and the importance of macrophytes and benthic oxygen consumption as components of the diurnal oxygen balance.

Subject Headings: Numerical models | Eutrophication | Nutrients | Water quality | Hydrologic models | Bays | Water pollution | Water resources | Estuaries | Quality control | North America | United States | New York

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