Improving Water Distribution Systems Robustness through Optimal Valve Installation

This study proposes a framework for improving the robustness of water distribution systems using the optimal valve installation approach with regard to system reinforcement. To improve the robustness in valve design, this study introduces critical segment selection technique and optimal valve location determination within the concept of segment. Using the segment finding algorithm, the segment and the unintentional isolation can be identified. To select the critical segment, a multicriteria decision technique is applied by considering the hydraulic, social and economic effect. Finally, the optimal valve locations and the number of additional valves is determined by pipe failure analysis through the trade-off relationship with the number of additional valves and the maximum damage under pipe failure situations. To verify the proposed technique, the real-world water distribution systems are applied and compared with the original design.

Download Full-text

Segment-based resilience response and intervention evaluation of water distribution systems

Journal of Water Supply Research and Technology—AQUA ◽

10.2166/aqua.2021.133 ◽

2021 ◽

Author(s):

Jun Liu ◽

Yinyin Kang

Keyword(s):

Distribution Systems ◽

Water Distribution ◽

Evaluation Method ◽

Water Distribution Systems ◽

Pipe Failure ◽

Critical Segment ◽

Recovery Response ◽

Efficient Recovery ◽

The Impact

Abstract The consideration of isolation valves and segments is essential for evaluating the water service and resilience of water distribution systems when shutdowns are required under pipe failure. However, little work has been done on assessing the resilience response and intervention based on segments. This study investigates the impact of intervention (valve density and protection of critical segment) and response (recovery time and recovery sequence) on system resilience taking valve layout into consideration. An algorithm to identify segments based on the graph theory is proposed. Resilience is quantified using the satisfactory rate of the water supply demand. Critical segments are ranked based on resilience analysis. The resilience evaluation method is applied to a case study network. It is found that valve optimization can significantly reduce the number of valves without considerably decreasing the resilience performance. Valve density and the protection of critical segment can reduce the severity of pipe failure, while efficient recovery response can reduce the severity and shorten the duration of pipe failure simultaneously. The criticality of segments depends on the segment location and hydraulic interdependency among segments.

Download Full-text

Development of Multi-Objective Optimal Redundant Design Approach for Multiple Pipe Failure in Water Distribution System

Water ◽

10.3390/w11030553 ◽

2019 ◽

Vol 11 (3) ◽

pp. 553 ◽

Cited By ~ 4

Author(s):

Young Choi ◽

Joong Kim

Keyword(s):

Optimal Design ◽

Distribution System ◽

Distribution Systems ◽

Water Distribution ◽

Search Algorithm ◽

Harmony Search ◽

Water Distribution Systems ◽

Design Approach ◽

Pipe Failure ◽

Multi Objective

This study proposes a multi-objective optimal design approach for water distribution systems, considering mechanical system redundancy under multiple pipe failure. Mechanical redundancy is applied to the system’s hydraulic ability, based on the pressure deficit between the pressure requirements under abnormal conditions. The developed design approach shows the relationships between multiple pipe failure states and system redundancy, for different numbers of pipe-failure conditions (e.g., first, second, third, …, tenth). Furthermore, to consider extreme demand modeling, the threshold of the demand quantity is investigated simultaneously with multiple pipe failure modeling. The design performance is evaluated using the mechanical redundancy deficit under extreme demand conditions. To verify the proposed design approach, an expanded version of the well-known benchmark network is used, configured as an ideal grid-shape, and the multi-objective harmony search algorithm is used as the optimal design approach, considering construction cost and system mechanical redundancy. This optimal design technique could be used to propose a standard for pipe failure, based on factors such as the number of broken pipes, during failure condition analysis for redundancy-based designs of water distribution systems.

Download Full-text

Pipe Failure Simulations with Individual Pipe Failure Probability for Estimating the Reliability of Water Distribution Systems

Korean Society of Hazard Mitigation ◽

10.9798/kosham.2012.12.4.051 ◽

2012 ◽

Vol 12 (4) ◽

pp. 51-57

Author(s):

Hwandon Jun

Keyword(s):

Failure Probability ◽

Distribution Systems ◽

Water Distribution ◽

Water Distribution Systems ◽

Pipe Failure

Download Full-text

Simultaneous Multi-pipe Failure Impact on Reliability of Water Distribution Systems

Procedia Engineering ◽

10.1016/j.proeng.2014.11.195 ◽

2014 ◽

Vol 89 ◽

pp. 326-332 ◽

Cited By ~ 8

Author(s):

A. Gheisi ◽

G. Naser

Keyword(s):

Distribution Systems ◽

Water Distribution ◽

Water Distribution Systems ◽

Pipe Failure

Download Full-text

Proposed probabilistic models of pipe failure in water distribution system

MATEC Web of Conferences ◽

10.1051/matecconf/201819302002 ◽

2018 ◽

Vol 193 ◽

pp. 02002

Author(s):

Thi Minh Lanh Pham ◽

Hai Ha Pham ◽

Nguyen Anh Thu Do ◽

Dinh Hong Le

Keyword(s):

Water Supply ◽

Distribution System ◽

Distribution Systems ◽

Water Distribution ◽

Unit Length ◽

Water Distribution Systems ◽

Labor Cost ◽

Experimental Models ◽

Pipe Failure ◽

Tree Model

All pipes in water supply network are installed underground, so it is difficult to identify pipe failure location during the operation of a system. Prediction of the risk of pipe failure in the water distribution systems is necessary for preparation of reparations and displacement of a pipe network system. Based on the probability of pipe failure, it will be possible to save money and labor cost for water supply companies. Many studies have been conducted on this topic, some of which used experimental models, others used statistical models in which recently many authors used regression model, but almost all the models come up with calculating the pipe failure rate per unit length of pipe in a year. It is not a direct probability of pipe failure. This article reviews various methods to evaluate pipe failure in water distribution systems. Based on that, the authors proposed two models: Regression Logistic Model and Decision Tree Model that would support an effective decision making for detecting the pipe failure and proposing appropriate solutions.

Download Full-text