Resilience/Availability Analysis of Municipal Water Distribution System Incorporating Adaptive Pump Operation
Publication: Journal of Hydraulic Engineering
Volume 139, Issue 5
Abstract
In last three decades, the reliability of water distribution systems (WDSs) has become a major concern, not only for water utilities and academic research communities, but also for society as a whole. Notable research has been conducted on the reliability/availability of WDSs, however, little attention has been paid to quantify the impact of adaptive operations as a response to system failure to enhance the resiliency of WDSs. Here, resilience is defined in the general sense as the ability to recover from a failure to a satisfactory state. In practice, if a system fails to supply water with adequate pressure, the water utility would take action to respond. Adaptive actions include switching on additional pumps as a short-term remedy or maintaining a higher water level in storage tanks as a long-term strategy to satisfy system pressure when a system experiences abnormal conditions. Here, a Monte Carlo simulation based framework for the resilience analysis of WDSs is implemented, considering the impact of adaptive pump operations and isolation valve locations. The framework consists of four steps: (1) random event generation for nodal demand fluctuations and pipe breaks; (2) identification of isolated segments based on valve layout; (3) hydraulic simulation with regular and adaptive operations; and (4) identification of responses and the evaluation of system resilience/availability. The proposed methodology is applied to a mid-sized WDS and results show that adaptive pump operations improve system resilience with a moderate pumping cost increase.
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Acknowledgments
This material is based in part upon work supported by the National Science Foundation under Grant No. 083590. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. The work is also financially supported by the National Natural Science Foundation of China under Grant No. 508781401. The authors gratefully acknowledge the China Scholarship Council for providing funds for Baoyu Zhuang’s visit to the University of Arizona.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 139 • Issue 5 • May 2013
Pages: 527 - 537
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Nov 21, 2011
Accepted: Sep 18, 2012
Published online: Sep 20, 2012
Published in print: May 1, 2013
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