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Comparison of Two Methods of End-of-Pipe Control for CSO and Stormwater.

Mario Conetta, Werner Wichmann and Mario Parente (1994)
MacViro Genivar; City of Toronto; Gore and Storrie Ltd.
DOI: https://doi.org/10.14796/JWMM.R176-20
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Abstract

Control and treatment of stormwater discharges and combined sewer overflows (CSO) from urban areas are issues of increasing importance in the field of water quality management. The City of Toronto has identified water quality problems resulting from these discharges and has undertaken to develop a Sewer System Master Plan for the virtual elimination of CSO and the control/ treatment of stormwater runoff prior to discharge to receiving waters. The CSO outfalls contribute approximately 71% of average annual volume and the stormwater outfalls 29%. It has been determined that for the City of Toronto the most effective means of controlling the CSO problem is to intercept CSO in a storage facility and then direct the intercepted CSO to a treatment facility at an acceptable rate of treatment. This paper presents a comparison of two methods of end-of-pipe control for CSO and stormwater to improve water quality. The two methods considered include a storage tunnel with one storage element and storage in scattered subsurface storage tanks. The tunnel system would consist of a 13,000 m long storage element along the lakefront from Parkside Drive to east of the Main Treatment Plant and a 3,400 m long tunnel along the Don Valley connecting to the lakefront tunnel. The subsurface storage tank system would consist of fifteen separate CSO and eleven stormwater tanks located at various outfall locations within the area identified above. Comparison of the two methods was undertaken in terms of effectiveness, environmental impacts, capital cost, treatment flexibility and operation and maintenance requirements.

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PAPER INFO

Identification

CHI ref #: R176-20 1168
Volume: 2
DOI: https://doi.org/10.14796/JWMM.R176-20
Cite as: CHI JWMM 1994;R176-20

Publication History

Received: N/A
Accepted: N/A
Published: February 15, 1994

Status

# reviewers: 2
Version: Final published

Copyright

© 1994 CHI. Some rights reserved.

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

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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

Mario Conetta

MacViro Genivar, Markham, ON, Canada
ORCiD:

Werner Wichmann

City of Toronto, Toronto, ON, Canada
ORCiD:

Mario Parente

Gore and Storrie Ltd., Mississauga, ON, Canada
ORCiD:


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