Optimal Restoration Strategy of a Water Pipeline Network in Surigao City, Philippines

Garciano, Agnes; Garciano, Lessandro Estelito O.; Tanhueco, Renan Ma.; Abubo, Taze Jared

doi:10.21660/2018.42.7130

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…Resilience is defined as the ability of a system to respond to the continuous stresses caused by disasters and go back to its normal operating condition rapidly (Wreathall, 2006). The ability of the WDN to quickly recover against seismic hazards is important specifically for health and sanitation reasons and for post-seismic activities (Garciano et al , 2018). There are four properties of resilience – robustness, rapidity, redundancy and resourcefulness (Bruneau et al , 2003).…”

Section: Introductionmentioning

confidence: 99%

Proposed resilience index of water lifeline systems

Carandang

Garciano

Maruyama

et al. 2020

IJDRBE

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Purpose Water distribution networks (WDNs) must deliver water to its customers 24/7. Disruption of this important service after a strong seismic event impedes post-disaster activities and poses health and sanitation problems. Hence, WDNs must be able to quickly restore services after the occurrence of a major seismic event. This ability to return the water service can be a metric for resilience. The purpose of this paper is to quantify the resilience by developing a framework that translates various restoration strategies into an improved resilience measure for a multisource WDN. Design/methodology/approach This paper used a quantitative risk assessment method in developing the framework for the resilience quantification of WDN. Prim’s algorithm, Horn’s algorithm and maximum slope method are used for the restoration analysis conducted in this study. Findings This paper provides resilience indices of the WDN for each repair scenarios. Then, the resilience indices are used to determine the most efficient and optimized repair scenario to restore the hypothetically damaged WDN owing to Level 1 and Level 2 seismic events. Research limitations/implications The developed framework of this study only focuses on the robustness, rapidity and resourcefulness properties of resilience. Practical implications This study aims to help the water district in the maintenance, repair and evaluation of WDN against seismic events. The results from the study can be used in preparing the disaster management plan of the local water district to repair possible pipelines. This study also serves as a starting point to more complex and comprehensive research about the resilience quantification of WDNs with the consideration of optimal restoration sequence in the future. Originality/value The developed framework in the resilience quantification of WDN is original, as it uses optimal restoration strategies to represent the rapidity property of resilience.

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Section: Introductionmentioning

confidence: 99%

Proposed resilience index of water lifeline systems

Carandang

Garciano

Maruyama

et al. 2020

IJDRBE

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show abstract

“…The estimation or modeling of the risk or damage of WDNs due to natural hazards has been studied extensively [4] - [6]. However, literature regarding optimal sequencing of the repair of a WDN after a seismic event [7], [8] are few. In these papers, Horn's algorithm was employed to determine an optimal restoration strategy for a single-source water network.…”

Section: Efficient Repair Scheduling Strategy Of a Multi-source Lifeline Network Using Constrained Spanning Forest 1 Introductionmentioning

confidence: 99%

Efficient Repair Scheduling Strategy of a Multi-Source Lifeline Network Using Constrained Spanning Forest

Garciano¹

2019

GEOMATE

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Pre-disaster programs, especially for seismic hazards, are necessary to quickly recover the services of a lifeline network. In the case of a multi-source (or multi-root) water lifeline network, an efficient repair schedule must be implemented immediately after an earthquake to assist in post-disaster activities as well as to minimize the subsequent health problems caused by the lack of potable water supply. As such water lifeline operators must establish restoration strategies especially if the supply of water comes from different sources and spatially distributed. For a single-source water network, Horn's algorithm can be used to determine an optimal restoration strategy. However, a variation of this algorithm is necessary in order to allow simultaneous repairs at any given time for a multiple-source lifeline water network. In this research, the authors employ a constrained spanning forest (CSF) algorithm to decompose the network into trees rooted at each source. After the decomposition, Horn's algorithm is used to determine the optimal restoration strategy for each tree in the network with the objective of minimizing a penalty value. Restoration of each node in the spanning forest is carried in sequence according to availability of the crew and allows simultaneous jobs to be done on consecutive arcs in the sequence.

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Setting the natural gas selling price through pipeline network optimization and project feasibility study

Nurprihatin

Andry

Tannady³

2021

J. Phys.: Conf. Ser.

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Natural gas will play an important role in the energy revolution, but its construction is still costly. Natural gas transport pipeline network shoulders the task of gas supply, which plays a significant role in improving the overall socio-economic benefits for the region. Pipeline network optimization design is a complex problem, involving many variables. In this study, the location of the Distribution Center is considered and was obtained from the previous study. This study also considers the distance between locations of households. The Minimum Spanning Tree (MST) is applied to obtain the pipeline network length. Then, the calculation is proceeded through the Benefit-cost Ratio in determining whether this project is feasible or not. Although the MST result shows the pipeline is longer than the previous work, studies have shown that the project is still feasible to run. The study also explains that the government can still sell gas at a lower price in the break-even condition.

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Optimal Restoration Strategy of a Water Pipeline Network in Surigao City, Philippines

Cited by 4 publications

References 4 publications

Proposed resilience index of water lifeline systems

Proposed resilience index of water lifeline systems

Efficient Repair Scheduling Strategy of a Multi-Source Lifeline Network Using Constrained Spanning Forest

Setting the natural gas selling price through pipeline network optimization and project feasibility study

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