Decreasing the Discoloration Risk of Drinking Water Distribution Systems through Optimized Topological Changes and Optimal Flow Velocity Control
Publication: Journal of Water Resources Planning and Management
Volume 144, Issue 2
Abstract
In this paper, a new mathematical framework is proposed for maximizing the self-cleaning capacity (SCC) of drinking water distribution systems by controlling the diurnal peak flow velocities in the pipes under normal operation. This is achieved through an optimal change of the network connectivity (topology). This paper proposes an efficient algorithm for the network analysis of valve closures, which allows enforcing favorable changes in the flow velocities for maximizing the SCC by determining an optimal set of links to isolate in the forming of a more branched network, while concurrently satisfying the hydraulic and regulatory pressure constraints at the demand nodes. Multiple stochastic demands from an end-use demand model are generated to test the robustness in the improved SCC for the modified network connectivity under changing demand. An operational network model is used to demonstrate the efficacy of the proposed approach.
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Acknowledgments
The authors thank PWN for providing the Purmerend network model and for the extensive research they have done in this specific network area. The first author was at the Department of Civil and Environmental Engineering, Imperial College London and was financially supported by the NEC-Imperial Smart Water Systems project when some of the work presented in the manuscript was carried out.
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©2017 American Society of Civil Engineers.
History
Received: Dec 16, 2016
Accepted: Jul 27, 2017
Published online: Dec 14, 2017
Published in print: Feb 1, 2018
Discussion open until: May 14, 2018
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