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Impedance estimation along pipelines by generalized reconstructive method of characteristics for pipeline condition assessment

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journal contribution
posted on 2024-09-17, 04:32 authored by C Zhang, James GongJames Gong, AR Simpson, AC Zecchin, MF Lambert
Reliable and efficient pipeline condition assessment in water transmission mains is required to locate deteriorated sections, such that water authorities can rehabilitate or replace vulnerable sections to prevent pipe failure. In this paper, a novel method is developed to estimate pipeline impedance and pipeline wall thickness through hydraulic transient testing. The recently developed reconstructive method of characteristics (RMOC) algorithm is generalized in the current research by relaxing the requirement of a dead-end boundary. Instead, the generalized RMOC as proposed requires two adjacent pressure transducers placed at any interior locations along a pipe to record head variations in a controlled transient event. The parameters along the pipeline can be analytically determined though the smart use of a method of characteristics (MOC) analysis backwards in time. The configuration required by the proposed method makes it applicable in the real world. The proposed approach is first verified by a numerical experiment, where three sections with different wall thicknesses (representing deteriorated sections) are successfully identified. The new technique is then verified by a laboratory experiment, where wall thickness and location of two sections with wall class changes are identified.

History

Journal

Journal of Hydraulic Engineering

Volume

145

Article number

ARTN 04019010

Pagination

1 - 10

Location

Reston, VA.

Open access

  • Yes

Access conditions

This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at https://doi.org/10.1061/(ASCE)HY.1943-7900.0001580

ISSN

0733-9429

eISSN

1943-7900

Language

eng

Publication classification

C Journal article, C1.1 Refereed article in a scholarly journal

Copyright notice

2019, American Society of Civil Engineers

Issue

4

Publisher

American Society of Civil Engineers