A systematic framework for dynamic nodal vulnerability assessment of water distribution networks based on multilayer networks
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Date
2021-11
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Publisher
Elsevier
Abstract
Nodal demands vary throughout the day, as such any vulnerability analysis based on static networks, which
considers daily average demands cannot realistically represent the criticality of nodes in the network. This study
presents a systematic framework, which couples multilayer networks, structural reducibility and a Demand
Adjusted Vulnerability Measure for dynamic nodal vulnerability assessment of water distribution networks
(WDNs) under extended period simulation. Within this framework, we present the novel idea of characterizing
the dynamics of WDNs with multi-slice networks, which captures the state of the network within a predefined
temporal window taking into consideration the directional flow in pipes and the operational status of pumps,
valves etc. Using a benchmark WDN, Net 3, as a case study we have demonstrated the importance of demand
variations and operational status of various components, no matter how minuscule their operational time, on
nodal vulnerability assessment in WDNs. The results indicated that the framework evaluates the criticality of all
types of nodes, even intermediary nodes with zero base demand, within any temporal window much more
realistically than conventional vulnerability analysis methods based on single (static) networks. Structural
reducibility unearthed correlations between the operational status of source nodes and pumps on the general
dynamics of the distribution system. The multilayer framework opens a new frontier in vulnerability analysis of
WDNs and could serve as a tool for stakeholders in accessing node criticality, impact of various failure scenarios
and optimal scheduling of maintenance routines.
Description
This article is published by Elsevier 2021 and is also available at https://doi.org/10.1016/j.ress.2021.108217
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Citation
H.M. Tornyeviadzi et al.