Infrastructure Risk Analysis of Municipal Water Distribution System

Ezell, Barry; Farr, John V.; Wiese, Ian

doi:10.1061/(asce)1076-0342(2000)6:3(118)

Cited by 54 publications

(31 citation statements)

References 2 publications

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“…Ezell et al (2000) develop an interesting approach by assigning "access" and "exposure" fuzzy factors. "Access" corresponds to the degree of protection of the device and "exposure" corresponds to its degree of visibility or accessibility.…”

Section: Vulnerability Analysismentioning

confidence: 99%

“…"Access" corresponds to the degree of protection of the device and "exposure" corresponds to its degree of visibility or accessibility. Ezell et al (2000) assume that the total vulnerability is the product of access and exposure. Torres et al (2009) implement this approach for risk screening in order to sort WDN nodes that require more attention and to be analyzed in depth.…”

Section: Vulnerability Analysismentioning

confidence: 99%

See 1 more Smart Citation

Intentional contamination of water distribution networks: developing indicators for sensitivity and vulnerability assessments

Nafi

Crastes

Sadiq

et al. 2017

Stoch Environ Res Risk Assess

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Performing a comprehensive risk analysis is primordial to ensure a reliable and sustainable water supply. Though the general framework of risk analysis is well established, specific adaptation seems needed for systems such as water distribution networks (WDN). Understanding of vulnerabilities of WDN against deliberate contamination and consumers'sensitivity against contaminated water use is very vital to inform decision-maker. This paper presents an innovative step-by-step methodology for developing comprehensive indicators to perform sensitivity, vulnerability and criticality analyses in case of absence of early warning system (EWS), which may lead to reliable risk assessment. The assessment and the aggregation of these indicators with specific fuzzy operators allow identifying the most critical points in a WDN. Intentional intrusion of contaminants at these points can potentially harm both the consumers as well as water infrastructure. The implementation of the developed methodology has been demonstrated through a case study of a French WDN unequipped with sensors.

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Section: Vulnerability Analysismentioning

confidence: 99%

Section: Vulnerability Analysismentioning

confidence: 99%

Intentional contamination of water distribution networks: developing indicators for sensitivity and vulnerability assessments

Nafi

Crastes

Sadiq

et al. 2017

Stoch Environ Res Risk Assess

View full text Add to dashboard Cite

show abstract

“…This method has four stages: first, the risks are identified; second, possible scenarios are worked out; third, the system's security is established and expected losses for each scenario calculated; fourth, alternative damage mitigation measures are developed, the risk model is reappraised and the Pareto boundaries of the mitigation alternatives determined. In another paper [12], the method is applied to a WSS to show how it can be used to assess the risk and determine the use of scarce resources to improve the security of the system.…”

Section: Risksmentioning

confidence: 99%

Infrastructure Management Methodologies in Risk Situations

Marques¹,

Cunha²

2011

Int. J. SDP

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Water supply systems (WSS) are complex but vitally important infrastructures in today's societies. They are exposed to various risk situations from natural disasters and human failings, but criminal acts can also compromise their operations and cause substantial economic and social damage. Several publications on how to tackle these concerns have appeared in the last few years. This paper presents the state of the art in terms of the vulnerabilities, risks, interdependencies and optimization models inherent to WSSs. It further describes the robust optimization method used in engineering systems and in actual WSSs. finally, the ways in which robustness is included, as described in case studies, are systematized and some conclusions are drawn.

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“…In this study, the vulnerability of urban drainage systems is defined as the degree to which a system is susceptible to, or unable to cope with, adverse effects when subject to exceptional conditions, such as pipe blockage. Vulnerability analysis is an important analytical tool that has been applied to a number of diverse fields such as climate change impact assessment, natural disaster management, environmental protection, land use management, communications and networking, industrial production and sustainable development, water distribution systems [10][11][12][13][14][15][16][17][18]. For example, Davidson and Shah (1997) developed a comprehensive urban Earthquake Disaster Risk Index that allows direct comparison of the relative overall earthquake disaster risk of cities worldwide, and describes the relative contribution of various factors to that overall risk [11].…”

Section: Introductionmentioning

confidence: 99%

“…In fact, vulnerability analysis is normally conducted from identifying various threats that may occur, testing the response of the system, and identifying the weakest components. In the field of water distribution systems, different quantitative analysis methods have been developed for vulnerability assessment, such as probability and statistics methods, comprehensive index methods, Markov Latent Effects modeling methods [14,[19][20][21][22][23][24][25][26][27][28][29][30]. For example, Murray et al (2004) developed a probability and statistics method which can be used to assess the vulnerability of a water utility to a large range of contamination attacks [26].…”

Section: Introductionmentioning

confidence: 99%

Vulnerability Analysis of Urban Drainage Systems: Tree vs. Loop Networks

et al. 2017

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Vulnerability analysis of urban drainage networks plays an important role in urban flood management. This study analyzes and compares the vulnerability of tree and loop systems under various rainfall events to structural failure represented by pipe blockage. Different pipe blockage scenarios, in which one of the pipes in an urban drainage network is assumed to be blocked individually, are constructed and their impacts on the network are simulated under different storm events. Furthermore, a vulnerability index is defined to measure the vulnerability of the drainage systems before and after the implementation of adaptation measures. The results obtained indicate that the tree systems have a relatively larger proportion of critical hydraulic pipes than the loop systems, thus the vulnerability of tree systems is substantially greater than that of the loop systems. Furthermore, the vulnerability index of tree systems is reduced after they are converted into a loop system with the implementation of adaptation measures. This paper provides an insight into the differences in the vulnerability of tree and loop systems, and provides more evidence for development of adaptation measures (e.g., tanks) to reduce urban flooding.

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Infrastructure Risk Analysis of Municipal Water Distribution System

Cited by 54 publications

References 2 publications

Intentional contamination of water distribution networks: developing indicators for sensitivity and vulnerability assessments

Intentional contamination of water distribution networks: developing indicators for sensitivity and vulnerability assessments

Infrastructure Management Methodologies in Risk Situations

Vulnerability Analysis of Urban Drainage Systems: Tree vs. Loop Networks

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