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Surge Modeling in Sewers using Alternative Hydraulic Software Programs

Karen Ridgway and Gregory J. Kumpula (2008)
Applied Science Associates, USA
DOI: https://doi.org/10.14796/JWMM.R228-10
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Abstract

Rapid filling, such as from large and intense rain storms, can result in the formation of open channel surge waves (hydraulic bores) with steep wave fronts in sewers/tunnels. Hydraulic bores travel in the sewers/tunnels until they reach an upstream, downstream or internal boundary (e.g. at shafts or manholes). As the sewer/tunnel system fills, the bores wholly or partially reflect off the boundaries and discontinuities of the sewer/tunnel system causing surges in hydraulic grade line (HGL) elevations that rise above ground surface elevations. Surges are important to evaluate and control in deep relief sewers and tunnels since they can cause high internal pressures that can stress the conduit walls, damage manhole/shaft structures, and cause spilling of combined sewage to the environment. Stress reversals can loosen structures and their anchors.

It is important that the hydraulic modeling software used for the design of the sewer/tunnel facility accurately compute surge conditions since the cost for surge control measures can be significant, and failures due to improperly controlled surges can be catastrophic. The required surge control measures depend on the proposed operational scheme, and the control measures may be over- or under-sized depending on the hydraulic software program used for the design.

Hydraulic modeling software programs currently in common use for sewer system hydraulic modeling were not developed to simulate rapidly varying open channel transient conditions. These programs, as commonly applied to sewer systems, will under predict and over damp the surge waves.

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PAPER INFO

Identification

CHI ref #: R228-10 818
Volume: 16
DOI: https://doi.org/10.14796/JWMM.R228-10
Cite as: JWMM 16: R228-10

Publication History

Received: N/A
First decision: N/A
Accepted: N/A
Published: February 15, 2008

Status

# reviewers: 2
Version: Final published

Copyright

© 2008 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

Karen Ridgway

Applied Science Associates, Detroit, MI, USA
ORCiD:

Gregory J. Kumpula

Applied Science Associates, Detroit, MI, USA
ORCiD:


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creative commons license   JWMM content is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0 DEED)


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