Sensitivity Analysis of a Transient-Based Frequency Domain Method for Extended Blockage Detection in Water Pipeline Systems
Publication: Journal of Water Resources Planning and Management
Volume 142, Issue 4
Abstract
Partial blockages are commonly formed in water supply pipelines due to many factors, such as deposition, biofilm, and corrosion in the natural water supply process, as well as valve throttle in the artificial construction and operation process, which may cause additional energy losses and serious water supply accidents in the system. Recently, a transient-based frequency domain method (TBFDM) has been developed by the author for extended partial blockage detection, and it was found to be efficient, nonintrusive, and inexpensive to apply. While this method has been validated and applied for numerical and laboratory experiments in previous studies for a variety of blockage and hydraulic conditions, the application results revealed that the accuracy of the TBFDM may be easily affected by uncertainties in the experimental process. This paper investigates the sensitivity of the developed TBFDM to different uncertainty factors that commonly exist in water pipeline systems, with perspective to better understand and use this efficient and economic method in practice. The methods of first-order second-moment analysis and Monte Carlo simulation are adopted in this paper for the investigation. The obtained results are discussed for the validity range and limitations of current TBFDM for practical applications.
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Acknowledgments
The work described in this paper was partially supported by the research grants from the Research Grant Council of the Hong Kong SAR, China (Project No. T21-602/15R) the Hong Kong Polytechnic University (Project Nos. 1-ZVCD, G-UC73, and G-YBC9).
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© 2015 American Society of Civil Engineers.
History
Received: Aug 10, 2015
Accepted: Oct 13, 2015
Published online: Dec 30, 2015
Published in print: Apr 1, 2016
Discussion open until: May 30, 2016
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