Optimal planning model for rehabilitation of water networks

Kim, J.-H.; Baek, Chun-Woo; Jo, Deokjun; Kim, E.-S.; Park, M.-J.

doi:10.2166/ws.2004.0050

Cited by 10 publications

(9 citation statements)

References 13 publications

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“…The methods presented by these authors allow for a systemwide analysis and prioritization of assets. Finally, examples of multi-objective formulations of the replacement planning problem are presented (Dandy & Engelhardt, 2006;Kim et al, 2004;Osman et al, 2017), which involve considerations such as cost minimization, hydraulic reliability, and impacts to road users and customers.…”

Section: Background and Literature Reviewmentioning

confidence: 99%

Optimizing cluster selections for the replacement planning of water distribution systems

2021

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Risk assessment is an effective tool for revealing criticalities across an entire water system. However, standard outputs that report risk at the individual pipe segment level can have limited use for decision support since utilities typically plan for the replacement of aggregated areas to minimize disruption and cost. This research presents a process for aggregating individual pipes into high-risk clusters. Each cluster is a group of contiguous pipe which, when targeted, will reduce mobilization cost and community disruption. A graph search is first used to locate potential clusters, and then the optimal selection, which maximizes risk capture, is identified. An integer programming model is presented, and the process is implemented on a real system. Empirical trials suggest that the ability to prevent future breaks is not significantly reduced when prioritizing clusters rather than individual pipes. This shows that the proposed method can guide more cost-efficient planning for pipe replacements.

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Section: Background and Literature Reviewmentioning

confidence: 99%

Optimizing cluster selections for the replacement planning of water distribution systems

2021

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“…HS works with those three basic parameters (HM, HMCR and PAR) and Fig. 3 shows flowchart of HS suggested by Geem et al (2001) Paik (2001), Kim et al (2004) and Paik et al (2005) reported that changes in the HS parameters may shorten the searching time for the global optimum. Paik (2001) and Paik et al (2005) divided HS into three types, namely, type 1 (HS1), type 2 (HS2), type 3 (HS3) and suggested the MHS (Modified HS) having a different method for applying HMCR and PAR.…”

Section: Harmony Search Algorithmmentioning

confidence: 99%

“…Paik (2001) and Paik et al (2005) divided HS into three types, namely, type 1 (HS1), type 2 (HS2), type 3 (HS3) and suggested the MHS (Modified HS) having a different method for applying HMCR and PAR. Kim et al (2004) suggest the ReHS (Revised HS) using non-fixed values of HMCR and PAR to improve the searching capability for optimization of pipe rehabilitation and this approach is used in this study.…”

Section: Harmony Search Algorithmmentioning

confidence: 99%

Development of a PDA model for water distribution systems using harmony search algorithm

2010

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Hydraulic analysis of water distribution systems can be divided into DDA (Demand-Driven Analysis) and PDA (Pressure-Driven Analysis). Many studies have reported the superiority of the PDA over the DDA in the realistic simulation of hydraulic conditions under abnormal operating conditions. Many of the developed PDA models rely on iterative processes to solve the equations, which is a timeconsuming task and even worse it is not possible to solve them in some cases. To improve the efficiency of the PDA, the present study proposes a new PDA model which interfaces a hydraulic simulator and an optimization algorithm with a customized searching scheme. The suggested model is applied to differently sized water distribution systems under abnormal operating conditions and its results are compared with ones by the DDA model and two other PDA models. As results, the DDA may generate unrealistic hydraulic results under the abnormal operating conditions while the three PDA models produce more realistic results. Moreover, the suggested PDA model with the new optimization process simulates the hydraulic conditions under the abnormal operating conditions in large water distribution systems efficiently compared to the other PDA models.

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“…Actually it is a difficult problem due to budget limitations. So, in most cases, decisions are made on when and which pipes in the system should be replaced or rehabilitated (Kim et al [8]).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Rehabilitation Solutions for Performance of Water Pipes Network (Case Study-El- Minia New City Network)

Ali

Abozeid

Darweesh

et al. 2015

JES. Journal of Engineering Sciences

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Aging of pipes and increasing demands placed upon it, have led to system deterioration which causes increase in operation, maintenance costs and decrease in the quality and quantity of water supplied. The water utilities put the plans to overcome these problems by suggesting solutions valid through a predefined period of time. When suggesting these solutions, the utilities mainly concentrate on the cost only without taking into consideration many important factors. In the target year, El-Minia new city network will suffer from many problems such as low pressures and high velocities. In this paper, twelve of demand allocating methods is used to simplify El-Minia network to facilitate the optimization process, and the best method is selected and used. We suggest solutions to the network by using Darwin Designer which is a tool in Bentley WaterGEMS V8i software. In addition, many tools in the software are used to evaluate the suggested solutions according to cost, efficiency, network performance at abnormal conditions and water quality. Finally, the most consistent solution is selected.

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Optimal planning model for rehabilitation of water networks

Cited by 10 publications

References 13 publications

Optimizing cluster selections for the replacement planning of water distribution systems

Optimizing cluster selections for the replacement planning of water distribution systems

Development of a PDA model for water distribution systems using harmony search algorithm

Evaluation of Rehabilitation Solutions for Performance of Water Pipes Network (Case Study-El- Minia New City Network)

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