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Water Resources Management
Published in: Water Resources Management 11/2016

01-09-2016

Enhancing Knowledge in Water Distribution Networks via Data Assimilation

Authors: Cristiana Bragalli, Matteo Fortini, Ezio Todini

Published in: Water Resources Management | Issue 11/2016

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Abstract

This paper deals with uncertainty estimation and knowledge enhancement in water distribution networks (WDNs). A new three steps data assimilation approach is introduced, which in combination with multi-objective optimization, allows selecting effective and affordable monitoring networks. An innovative cascade of Ensemble Kalman Filters is used to assimilate the information deriving from sensors measuring pressure heads, flow in pipes and demands, with the objective of increasing knowledge while preserving at the same time the structural relationships among state variables. Selection of the most appropriate and economically affordable measurement network, is then based on the derivation of a Pareto front using the NSGA-II algorithm in conjunction with the data assimilation approach. The front is obtained by compromising between the overall sensors cost and the uncertainty reduction (or knowledge enhancement), which is expressed as a function of the Total Variance of state variables. The operational use of the proposed data assimilation approach as well as the effectiveness of the chosen observation network is also demonstrated by showing the reduction of uncertainty deriving from successive assimilations of real-time observations.
previous article Penalty-Free Multi-Objective Evolutionary Approach to Optimization of Anytown Water Distribution Network
next article Multiobjective Genetic Optimization Approach to Identify Pipe Segment Replacements and Inline Storages to Reduce Sanitary Sewer Overflows

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Appendix
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Metadata
Title
Enhancing Knowledge in Water Distribution Networks via Data Assimilation
Authors
Cristiana Bragalli
Matteo Fortini
Ezio Todini
Publication date
01-09-2016
Publisher
Springer Netherlands
Published in
Water Resources Management / Issue 11/2016
Print ISSN: 0920-4741
Electronic ISSN: 1573-1650
DOI
https://doi.org/10.1007/s11269-016-1372-0

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