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• W2333060743 abstract "Metro Wastewater Reclamation District is the wastewater treatment authority for much of metropolitan Denver and parts of northern Colorado. The mechanical bar screens at the North Complex Headworks of the Metro District's Robert W. Hite Treatment Facility (RWHTF) have periodically become overwhelmed and clogged during high flow events by slugs of debris, such as rags and grease. The result of a few of these incidents has been raw wastewater spills onto the RWHTF site, with risks associated with potential discharge to the South Platte River. During a recent headworks rehabilitation project, the Metro District included the design and construction of a 230-million-gallon-per-day (mgd) passive overflow channel that would act as an emergency flow bypass around the screens and help prevent future wastewater spills. The entrance to the overflow channel is a side channel (lateral flow) weir located along one wall of the headworks influent channel. The overflow channel itself was subject to the following constraints: (1) the limited available elevation difference across the channel required a majority of the weir to be submerged at the peak design flow of 230 mgd; (2) the configuration of the headworks facility required that the downstream portion of the weir be oriented adverse to the overflow channel flow direction, which restricted the conveyance capacity of the channel; and (3) site constraints required a relatively flat channel with a steep drop end transition, which produced supercritical flow downstream of the weir location. An analytical model was developed to estimate the water levels across the weir and evaluate its ability to prevent wastewater spills. However, given the limitations of this approach, the combination of subcritical and supercritical flows in the channel, and the intricacies of the design, a physical model was constructed to aid in the final design. This paper outlines the development of the analytical model in exploring the feasibility of the proposed overflow design, the limitations of the model, the results of the physical study (including an innovative approach to address the adversely directed weir flow) and a comparison of the physical and analytical model results. The latter is presented to provide future designers guidance on the design similar structures when using analytical techniques." @default.
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• W2333060743 date "2012-05-17" @default.
• W2333060743 modified "2023-10-16" @default.
• W2333060743 title "Validation and Guidance for Submerged Lateral Flow Weir Design" @default.
• W2333060743 doi "https://doi.org/10.1061/9780784412312.169" @default.
• W2333060743 hasPublicationYear "2012" @default.
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