Assessing mechanical vulnerability in water distribution networks under multiple failures

Water Resources Research, Journal Year: 2014, Volume and Issue: 50(3), P. 2586 - 2599

Published: March 1, 2014

Abstract Understanding mechanical vulnerability of water distribution networks (WDN) is direct relevance for utilities since it entails two different purposes. On the one hand, might support identification severe failure scenarios due to external causes (e.g., natural or intentional events) which result into most critical consequences on WDN supply capacity. other aims at figure out portions are more prone be affected by asset disruptions. The complexity such analysis stems from number possible with single and multiple simultaneous shutdowns elements leading modifications network topology insufficient customers. In this work, search disruptive combinations events formulated solved as a multiobjective optimization problem. higher detected those causing lower supplied demand failures. automatic detection topology, subsequent detachments failed elements, combined pressure‐driven analysis. methodology demonstrated real network. Results show that, besides failures detachment reservoirs, tanks, pumps, there topological may cause service Such information planning enhancement works improve preparedness extreme events.

Language: Английский

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A novel infrastructure modularity index for the segmentation of water distribution networks

Water Resources Research, Journal Year: 2014, Volume and Issue: 50(10), P. 7648 - 7661

Published: Sept. 8, 2014

Abstract The search for suitable segmentations is a challenging and urgent issue the analysis, planning management of complex water distribution networks (WDNs). In fact, large size hydraulic systems require division into modules in order to simplify analysis tasks. network theory, modularity index has been proposed as measure strength its maximization used identify community nodes (i.e., modules) which are characterized by strong interconnections. Nevertheless, needs be revised considering specificity infrastructure systems. To this aim, classic recently modified tailored WDNs. WDN‐oriented affected resolution limit stemming from index. Such hampers identification/design small major drawback technical tasks requiring detailed segmentation. get over problem, we propose novel that not one. rationale good features theoretically demonstrated discussed using two real networks.

Language: Английский

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Functional Topology of Evolving Urban Drainage Networks

Water Resources Research, Journal Year: 2017, Volume and Issue: 53(11), P. 8966 - 8979

Published: Oct. 16, 2017

We investigated the scaling and topology of engineered urban drainage networks (UDNs) in two cities, further examined UDN evolution over decades. was analyzed using power-law characteristics widely employed for river networks: (1) Hack's law length ($L$)-area ($A$) [$L \propto A^{h}$], (2) exceedance probability distribution upstream contributing area $(\delta)$ [$P(A\geq \delta) \sim a \delta^{-\epsilon}$]. For smallest UDNs ($<2 \>\text{km}^2$), length-area scales linearly ($h\sim 1$), but emerges as grow. While $P(A\geq \delta)$ plots are abruptly truncated, those display exponential tempering \>\text{=}\> \delta^{-\epsilon}\exp(-c\delta)$]. The parameter $c$ decreases grow, implying that evolves time to resemble networks. However, exponent $\epsilon$ large tends be slightly larger than range reported Differences generative processes engineering design constraints contribute observed differences networks, including subnet heterogeneity non-random branching.

Language: Английский

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Redundancy Features of Water Distribution Systems

Procedia Engineering, Journal Year: 2017, Volume and Issue: 186, P. 412 - 419

Published: Jan. 1, 2017

Water Distribution Systems (WDS) are traditionally built with topological and energy redundancy to improve network reliability against mechanical hydraulic failure. This aim is achieved by designing them many inter-connected closed loops pipe diameters that larger than the ones strictly necessary fulfil design pressure at nodes. general approach, lacks a systematic based procedure, has been followed for decades in existing networks. Recently, novel topologic metrics have proposed water distribution analysis, partitioning. In this paper, four networks two literature compared using several of these trying identify features type civil infrastructural The comparison highlighted some peculiarities, terms topology energy, and, consequently, possibility define range similarity build hypothetical benchmark Further, analysis correlations exist between although more studies required.

Language: Английский

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A complex network theory approach for optimizing contamination warning sensor location in water distribution networks

International Journal of Disaster Risk Reduction, Journal Year: 2018, Volume and Issue: 30, P. 225 - 234

Published: May 1, 2018

Language: Английский

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