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Simulation of a Combined Sewer Overflow Storage Tank

Mark Stirrup and Danielle Marchant (2002)
Azurix North America; New City of Hamilton, Water Quality
DOI: https://doi.org/10.14796/JWMM.R208-17
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Abstract

The City of Hamilton owns and operates an extensive combined sewer system (CSS) which discharges combined sewer overflows (CSOs) at up to 23 different locations during wet weather. To address the pollution from these discharges, the City has constructed 5 CSO storage tanks to intercept and detain overflows during periods of wet weather. During dry weather, the stored wastewater is pumped and/or drained back into the CSS and conveyed to the Woodward Avenue Wastewater Treatment Plant for treatment. The existing tanks have typically been designed to limit the frequency of CSOs to 1-3 per year, and to meet CSO control levels set out by the Ontario Ministry of the Environment’s Procedure F-5-5 (MOE, 1997).

The Greenhill CSO Storage Tank was constructed in 1988 at a cost of $5.0 million. This was the first of Hamilton’s CSO control facilities, and it was designed to control the CSO volume generated by a 15 mm design storm, which provides a significantly lower level of CSO control than the facilities constructed since. The paper discusses the historical performance of the Greenhill CSO Storage Tank in terms of the CSO frequency and volume reduction it has afforded. The actual performance of the CSO tank as indicated by the City’s Supervisory Control and Data Acquisition system is compared to the simulated performance of the facility as indicated by continuous modeling with the United States Environmental Protection Agency’s Stormwater Management Model Version 4.0. The performance of the CSO tank is also measured against the volumetric CSO control requirements of Procedure F-5-5 (i.e. the capture and treatment of all dry weather flow plus 90% of the volume resulting from wet weather flow). The limitations of the simulation models are also discussed.

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PAPER INFO

Identification

CHI ref #: R208-17 981
Volume: 10
DOI: https://doi.org/10.14796/JWMM.R208-17
Cite as: CHI JWMM 2002;R208-17

Publication History

Received: N/A
Accepted: N/A
Published: February 15, 2002

Status

# reviewers: 2
Version: Final published

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© 2002 CHI. Some rights reserved.

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Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

The Journal of Water Management Modeling is an open-access (OA) publication. Open access means that articles and papers are available without barriers to all who could benefit from them. Practically speaking, all published works will be available to a worldwide audience, free, immediately on publication. As such, JWMM can be considered a Diamond, Gratis OA journal.

All papers published in the JWMM are licensed under a Creative Commons Attribution 4.0 International License (CC BY).

JWMM content can be downloaded, printed, copied, distributed, and linked-to, when providing full attribution to both the author/s and JWMM.


AUTHORS

Mark Stirrup

Azurix North America, Hamilton, ON , Canada
ORCiD:

Danielle Marchant

New City of Hamilton, Water Quality, Hamilton, ON, Canada
ORCiD:


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