Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/41658
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Type: Conference paper
Title: Water Distribution Network Reliability Estimation Using the First-Order Reliability Method
Author: Tolson, B.
Maier, H.
Simpson, A.
Citation: Bridging the gap : meeting the world's water and environmental resources challenges [electronic resource] : proceedings of the World Water and Environmental Resources Congress : May 20-24, 2001, Orlando, Florida / Don Phelps, Gerald Sehlke (eds.): 10 p.
Publisher: American Society of Civil Engineers
Issue Date: 2001
ISBN: 0784405697
9780784405697
Conference Name: World Water and Environmental Resources Congress (2001 : Orlando, Florida)
Statement of
Responsibility: 
Bryan A. Tolson, Holger R. Maier, and Angus R. Simpson
Abstract: This paper utilizes the First-Order Reliability Method (FORM) for estimating water distribution network (WDN) reliability during critical loading conditions. The factors that are assumed to be uncertain include pipe roughness coefficients and nodal demands. FORM predictions of WDN nodal reliability compare closely with more accurate Monte Carlo Simulation (MCS) estimates. FORM is shown to automatically determine the critical node in the network in a reliable and efficient manner. The critical node reliability approximation to network reliability is evaluated and it is argued that the approximation is not appropriate in some cases. An improved FORM network reliability measure is proposed and shown to more closely approximate network reliability estimates when two failure modes are considered at the two worst nodes in the network. The findings of this paper should be considered in future WDN reliability-based optimization studies.
Rights: © 2001 American Society of Civil Engineers
RMID: 0020075566
DOI: 10.1061/40569(2001)413
Appears in Collections:Civil and Environmental Engineering publications
Environment Institute publications

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