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Locating Leaks in Water Distribution Systems Using Network Modeling

Paul Boulos, Trent Schade and Christopher W. Baxter (2008)
Innovyze; MWH; Hydrannt Consulting Inc.
DOI: https://doi.org/10.14796/JWMM.R228-21
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Abstract

Water distribution systems can experience high levels of leakage resulting in major financial, supply and pressure losses. Locating and repairing system leaks can drastically reduce the amount of water that is lost, as well as reduce the costs for obtaining, treating and pressurizing water distribution systems to meet current and future demands.

This chapter describes an efficient step-testing network modeling approach that solves the leakage detection problem using a direct application of network modeling and field testing. The technique involves bracketing the test area with excessive leakage into a tight branched network with a flow meter installed on its input main. Working from the valve furthest away from the flow meter, the size of the area is systematically reduced by closing valves to cut off different pipe sections in succession (so that less and less of the test area is supplied through the meter), at the same time recording changes in flow rate at the meter and comparing with model results. The sequence of closing valves is followed working backward towards the flow meter until the meter is reached (when the flow becomes zero). A disproportionate change in flow discrepancy between two successive steps indicates a leak in the section of pipe that was last shut off. The sequence is repeated by opening valves in reverse order.

The method can effectively narrow down leaks to specific pipe segments of the distribution system. It is normally carried out at night before the morning high demand to minimize supply interruption and inconvenience to customers. An example application is used to illustrate the proposed approach. The method should prove useful to any water utility attempting to locate excessive pipe leaks in distribution systems and conserve such a precious natural resource as water. It is modeling complexity through simplicity.

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PAPER INFO

Identification

CHI ref #: R228-21 829
Volume: 16
DOI: https://doi.org/10.14796/JWMM.R228-21
Cite as: CHI JWMM 2008;R228-21

Publication History

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

Status

# reviewers: 2
Version: Final published

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© 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

Paul Boulos

Innovyze, Tampa, FL, USA
ORCiD:

Trent Schade

MWH, Cincinnati, OH, USA
ORCiD:

Christopher W. Baxter

Hydrannt Consulting Inc., Port Coquitlam, BC, Canada
ORCiD:


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