East River Modeling of Water Quality for Multiple-Project Assessments

by Guy Apicella, Matusky & Skelly Engineers, Pearl River, United States,
Robert Norris, Matusky & Skelly Engineers, Pearl River, United States,
Johanna Newton, Matusky & Skelly Engineers, Pearl River, United States,
Walter Ewald, Matusky & Skelly Engineers, Pearl River, United States,
Angelika Forndran, Matusky & Skelly Engineers, Pearl River, United States,



Document Type: Proceeding Paper

Part of: Estuarine and Coastal Modeling

Abstract:

The East River Model (ERM), which employs the RMA-2V hydrodynamic and RMA-4 water quality modeling code, was used by Lawler, Matusky & Skelly Engineers to assess water quality impacts in conjunction with a number of programs administered by the New York City Department of Environmental Protection. The two modeling applications described in this paper relate to (1) combined sewer overflow (CSO) effects on dissolved oxygen (DO) and total coliform concentrations, and (2) water pollution control plant (WPCP) effluent dilution as related to whole effluent toxicity (WET) criteria. Two dye surveys at each of the city's six WPCPs revealed that the effluent is well mixed vertically at relatively short distances from the outfall. The ERM was used to simulate the effect of the city's 239 CSO outfalls on DO and total coliform within the East River system and thereby develop a plan for CSO abatement.

Subject Headings: Water quality | Water pollution | Effluents | Combined sewers | Quality control | Hydrologic models | Bacteria | New York City | New York | United States

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