Far-Field Numerical Model Studies for Boston's New Secondary Treatment Plant Outfall Siting

by Raymond Walton, Camp Dresser & McKee Int Inc, United States,
Rick Kossik, Camp Dresser & McKee Int Inc, United States,
Eric Adams, Camp Dresser & McKee Int Inc, United States,
Doug Cosler, Camp Dresser & McKee Int Inc, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


By the late 1900s, Boston is scheduled to have built a new secondary treatment plant that combines the waste streams from two existing plant, and discharges the resulting liquid effluent through a long outfall to Massachusetts Bay. The plant will be designed to discharge over 53 m3/s through a 2000 m diffuser into 30 m of water, approximately 13-16 km offshore. The objective was to site an outfall diffuser to maximize initial mixing and reduce the likelihood of discharged effluent returning to shore in high concentrations. An extensive field program was completed in order to understand system processes, and to calibrate circulation and transport models of the area.

Subject Headings: Numerical models | Water discharge | Fluid flow | Mathematical models | Water treatment plants | Water flow | Wastewater treatment plants | Bays | Massachusetts | United States | Boston

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