Valve-Controlled Segments in Water Distribution Systems

Jun, Hwandon; Loganathan, G. V.

doi:10.1061/(asce)0733-9496(2007)133:2(145)

Cited by 89 publications

(43 citation statements)

References 10 publications

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“…Hence valves are a crucial factor in evaluating the reliability of a WDN under cascading failures. There are a numbers of studies that focus on identification of the segments [42][43][44]. The method of pipe break isolation is adopted by Zhuang et al [45].…”

Section: Rules For Pipe Break Isolationmentioning

confidence: 99%

System Reliability Evaluation in Water Distribution Networks with the Impact of Valves Experiencing Cascading Failures

Shuang

Liu

Tang

et al. 2017

Water

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Abstract:Water distribution networks (WDNs) represent a class of critical infrastructure networks. When a disaster occurs, component failures in a WDN may trigger system failures that result in larger-scale reactions. The aim of the paper is to evaluate the evolution of system reliability and failure propagation time for a WDN experiencing cascading failures, and find the critical pipes which may reduce system reliability dramatically. Multiple factors are considered in the method such as network topology, the balance of water supply and demand, demand multiplier, and pipe break isolation. The pipe-based attack with multiple failure scenarios is simulated in the paper. A case WDN is used to illustrate the method. The results show that the lowest capacity gets stronger when a WDN is short of supply, becoming the dominant factor that decides the evolution of system reliability and failure propagation time. The valve ratio (VR) and system reliability present a flattened S curve relationship, and there are two turning points in VR. The critical pipes can be identified. With the fixed 5% valves, a WDN can improve system reliability and resist cascading failures effectively. The findings provide insights into the system reliability and failure propagation time for WDNs experiencing cascading failures. It is proven to be useful in future studies focused on the operation and management of water services.

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Section: Rules For Pipe Break Isolationmentioning

confidence: 99%

System Reliability Evaluation in Water Distribution Networks with the Impact of Valves Experiencing Cascading Failures

Shuang

Liu

Tang

et al. 2017

Water

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“…As far as the first topic is concerned, in the literature there are a number of studies regarding segment identification and the undesired disconnections that occur following the closure of a set of isolation valves. In particular, the methods proposed by [17] and [18] are based on a dual representation of the network, with segments treated as nodes and valves as links. The methods proposed by [4] and [13] use topological incidence matrices to identify the segments.…”

Section: Related Workmentioning

confidence: 99%

An ASP approach for the valves positioning optimization in a water distribution system

Gavanelli

Nonato

Peano

2013

Journal of Logic and Computation

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Abstract. Positioning of valves is a real-life issue in Water DistributionSystem design and, currently, it is usually addressed by hand by hydraulic engineers, or by means of genetic algorithms, that give no assurance of optimality. Since a given valves placement identifies a sectorization of the WDS in several isolable portions, the valves positioning problem can be seen as a variant of the well known graph partitioning, which is a hard combinatorial problem. [2] showed recently that Computational Logic can provide technologies and techniques that can be exploited to model and achieve the optimal partition of the water network (i.e., the optimal positioning of valves). In particular, they tackled the optimization of the valves positioning through a two player game model, giving a Constraint Logic Programming formalization to solve it effectively. The aim of this paper, instead, is to investigate the potential of Answer Set Programming in this practical application; evaluation is in terms both of language expressivity and solving efficiency. Results are discussed for different ASP models and a comparison with the CLP(FD) technique shown by [2] will be given.

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“…As we said in Section 2, choosing the last move is very easy, as there is only one reasonable solution: close all valves that are reachable from the broken pipe, without overpassing other valves. An implementation of this algorithm is given by Jun and Loganathan (2007).…”

Section: Game Modelmentioning

confidence: 99%

“…For example, pipe e 2,5 belongs to the sector consisting of the edges e 1,2 and e 2,5 , that is surrounded by valves v 1,2 , v 2,3 , v 5,4 , and v 5,6 ; however by closing these four valves, we will de-water a larger part of the network: edges e 2,3 , e 3,4 , and e 4,5 will be de-watered even though they are not in the same sector of the broken pipe. This effect is called unintended isolation (Jun and Loganathan 2007).…”

Section: Introductionmentioning

confidence: 99%

Optimal placement of valves in a water distribution network with CLP(FD)

Cattafi

Gavanelli

Nonato

et al. 2011

Theory and Practice of Logic Programming

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This paper presents a new application of logic programming to a real-life problem in hydraulic engineering. The work is developed as a collaboration of computer scientists and hydraulic engineers, and applies Constraint Logic Programming to solve a hard combinatorial problem. This application deals with one aspect of the design of a water distribution network, i.e., the valve isolation system design.We take the formulation of the problem by Giustolisi and Savić (2008) and show how, thanks to constraint propagation, we can get better solutions than the best solution known in the literature for the Apulian distribution network.We believe that the area of the so-called hydroinformatics can benefit from the techniques developed in Constraint Logic Programming and possibly from other areas of logic programming, such as Answer Set Programming.

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Valve-Controlled Segments in Water Distribution Systems

Cited by 89 publications

References 10 publications

System Reliability Evaluation in Water Distribution Networks with the Impact of Valves Experiencing Cascading Failures

System Reliability Evaluation in Water Distribution Networks with the Impact of Valves Experiencing Cascading Failures

An ASP approach for the valves positioning optimization in a water distribution system

Optimal placement of valves in a water distribution network with CLP(FD)

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