Estimation of Uncertainty in Long-Term Sewer Sediment Predictions Using a Response Database
Publication: Journal of Hydraulic Engineering
Volume 136, Issue 7
Abstract
Regulations require U.K. water companies to reduce the number of properties at risk of sewer flooding. One of the potential causes of sewer flooding is the presence of persistent sediment deposits in sewers, such deposits are a common problem in many combined sewers. Although the regulations are risk based, there is a gap in the current knowledge on how the risk assessment is affected by the uncertainty in sewer sediment transport prediction. This paper describes the development of a methodology for estimating uncertainty in sewer sediment deposit depth predictions using existing empirically calibrated sediment load equations and Monte Carlo simulations combined with a response database. This methodology has been used to estimate the range of uncertainty of in-pipe deposit build-up predictions for a U.K. combined sewer system that suffered persistent deposition problems.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 136 • Issue 7 • July 2010
Pages: 403 - 411
Copyright
© 2010 ASCE.
History
Received: May 6, 2008
Accepted: Dec 14, 2009
Published online: Dec 17, 2009
Published in print: Jul 2010
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