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Stormwater Management and Significant Channel Flows below the Two-year Return

Paul V. Villard and Ryan Ness (2007)
Geomorphic Solutions (Sernas); Toronto and Region Conservation Authority (TRCA)
https://doi.org/10.14796/JWMM.R227-26
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Abstract

Historically, hydrology and hydraulic targets and considerations associated with urban stormwater management have focused on flows equal to, or larger than, the two-year return. More recently, targets linked to concepts of effective and bankfull discharge have been defined to limit geomorphic impacts to receiving watercourses. These are generally tied to flows equal to, or of somewhat higher frequency than, the two-year return. Unfortunately, in many cases flows that have a significant impact on aquatic habitat, stream geomorphology and water quality are well below the two-year return event. A series of simple conceptual models are outlined to examine these flows. These flows are also examined in the context of the watersheds of the Greater Toronto Area, by combining simple conceptual models of these flows with geomorphic data from the Toronto and Region Conservation Authority’s Regional Monitoring Network.

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PAPER INFO

Identification

CHI ref #: R227-26 859
Volume: 15
Cite as: CHI JWMM 2007;R227-26
https://doi.org/10.14796/JWMM.R227-26

Publication History

Received: N/A
Accepted: N/A
Published: February 15, 2007

Status

# reviewers: 2
Version: Final published

Copyright

© 2007 CHI. Some rights reserved.

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.

Paper and publication copyrights are summarized here. JWMM content can be downloaded, printed, copied, distributed, and linked-to when providing full attribution to both the author/s and JWMM.


AUTHORS

Paul V. Villard

Geomorphic Solutions (Sernas), Mississauga, ON, Canada

Ryan Ness

Toronto and Region Conservation Authority (TRCA), Downsview, ON, Canada

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