Modeling Residual Chlorine in the Potomac Estuary

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by Scott C. Hinz, LTI, United States,
Nikolaos Katopodes, LTI, United States,
Paul L. Freedman, LTI, United States,
Michael P. Sullivan, LTI, United States,
Stuart A. Freudberg, LTI, United States,

Document Type: Proceeding Paper

Part of: Estuarine and Coastal Modeling:

Abstract: This paper presents the development and application of a two-dimensional finite element hydrodynamic and water quality model, termed Neleus, to assess chlorinated discharges to the Potomac Estuary. A limited hydrodynamic calibration was achieved through comparisons to tidal stage data and results of previous hydrodynamic modeling efforts conducted with the Dynamic Estuary Model (DEM). Water quality model dispersion coefficients were determined through simulation of Rhodamine WT dye released over a tidal day from the Blue Plains Wastewater Treatment Plant during a 1980 USGS dye study. Model dye predictions were compared to data sampled continuously at six stations over a five day period. Field survey data collected in 1984 were used to calibrate a first-order loss rate for TRC. Scenarios reflecting typical fish migration periods were used to assess the spatial extent of chlorinated discharge impacts.

Subject Headings: Hydrologic models | Water quality | Chlorine | Water pollution | Water discharge | Data processing | Estuaries | Mathematical models | Hydrodynamics | Potomac River

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