Water and Sediment Quality Analyses for the New Boston Wastewater Outfall

by Dominique Brocard, Metcalf & Eddy, Inc, United States,
Richard Baker, Metcalf & Eddy, Inc, United States,
Jamie Maughan, Metcalf & Eddy, Inc, United States,



Document Type: Proceeding Paper

Part of: Estuarine and Coastal Modeling

Abstract:

This paper describes portions of the farfield hydrodynamic and water quality modeling conducted during preparation of the Boston Harbor Wastewater Conveyance System Supplemental Environmental Impact Statement. Source code and input data sets for the Tidal Embayment Analysis (TEA) model and Eulerian Lagrangian Approach (ELA) model were obtained. Additional analyses were then conducted using a microcomputer, including: Sensitivity studies and calibration of the full-depth TEA hydrodynamic model to semi-diurnal (M2) tidal currents measured during unstratified conditions; development of TEA and ELA models of the Massachusetts Bay hypolimnion under vertically stratified conditions; application of both the full-depth and hypolimnion TEA and ELA models to determine wastewater discharge impacts on water quality; and use of ELA predicted solids deposition fields to determine benthic sediment organic enrichment, toxics accumulation and subsequent impacts on benthic communities at alternative discharge sites.

Subject Headings: Water quality | Hydrologic models | Water treatment plants | Water pollution | Water discharge measurement | Wastewater management | Sediment | Massachusetts | United States | Boston

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