Water Quality Parameter Estimation in Steady-State Distribution System
Publication: Journal of Water Resources Planning and Management
Volume 129, Issue 2
Abstract
The maintenance of chlorine residual is needed at all the points in the distribution system supplied with chlorine as a disinfectant. The propagation and level of chlorine in a distribution system is affected by both bulk and pipe wall reactions. It is well known that the field determination of wall reaction parameter is difficult. The source strength of chlorine to maintain a specified chlorine residual at a target node is also an important parameter. The inverse model presented in the paper determines these water quality parameters, which are associated with different reaction kinetics, either in single or in groups of pipes. The weighted-least-squares method based on the Gauss–Newton minimization technique is used for the estimation of these parameters. The validation and application of the inverse model is illustrated with an example pipe distribution system under steady state. A generalized procedure to handle noisy and bad (abnormal) data is suggested, which can be used to estimate these parameters more accurately. The developed inverse model is useful for water supply agencies to calibrate their water distribution system and to improve their operational strategies to maintain water quality.
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Published In
Journal of Water Resources Planning and Management
Volume 129 • Issue 2 • March 2003
Pages: 124 - 134
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Jun 26, 2001
Accepted: Feb 22, 2002
Published online: Feb 14, 2003
Published in print: Mar 2003
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