Sizing Municipal Storage Tanks Based on Reliability Criteria
Publication: Journal of Water Resources Planning and Management
Volume 134, Issue 6
Abstract
Municipal storage tanks are used to balance differences in supply and demand. Tanks have traditionally been sized based on deterministic criteria for balancing, fire, and emergency storage components. In this paper a stochastic analysis method is proposed to model both the deterministic and probabilistic components of consumer demand, fire demand, and pipe failures in water distribution systems. The method estimates a number of tank reliability criteria as functions of tank capacity, which provide a site-specific way of determining the required tank capacity based on user-defined reliability criteria. The method is illustrated by applying it to a “typical” water supply system. It was found that the tank failure duration follows a Weibull distribution. The tank failure rate was found to be very sensitive to tank capacity and can be described with an exponential distribution. It is proposed that one failure in under seasonal peak conditions is used as a design criterion for tank sizing. In many cases this will result in substantially smaller tanks than is currently specified by design guidelines.
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Information & Authors
Information
Published In
Journal of Water Resources Planning and Management
Volume 134 • Issue 6 • November 2008
Pages: 548 - 555
Copyright
© 2008 ASCE.
History
Received: Mar 28, 2007
Accepted: Feb 22, 2008
Published online: Nov 1, 2008
Published in print: Nov 2008
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