scholarly journals Coupling Decision Support Systems For The Optimization of The Management of Water Distribution Networks

2022 ◽  
Author(s):  
Yacine Abdelbaset Berrezel ◽  
Chérifa Abdelbaki ◽  
Bouchrit Rouissat ◽  
Tarik Boumaaza ◽  
Khaldoon A Mourad
Keyword(s):  
Decision Making ◽  
Decision Support ◽  
Decision Support Systems ◽  
Water Distribution ◽  
Support Systems ◽  
Distribution Network ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Water Distribution Networks ◽  
Multi Criteria Decision Making

Abstract The analysis of the current situation of water distribution networks is based on all the alternatives that are technically feasible and implemented from the decision-maker's point of view. Taking the water distribution network of Tourville city as a case study, this paper combines a set of Decision Support Systems (DSS) including the Geographic Information Systems (GIS), multi-criteria analysis and hydraulic simulation models to establish a multi-criteria decision-making aid method for renovation and rehabilitation of water distribution networks. This combination creates an expert management system based on multi-criteria decision making that strengthens the optimization of the management of water distribution networks in terms of renovation and rehabilitation. After dividing the water distribution network into three emergency levels, it was concluded that 26% of the network is in urgent need of rehabilitation.

scholarly journals Reliability based rehabilitation of water distribution networks by means of Bayesian networks

2017 ◽  
Vol 34 (1) ◽  
pp. 163-172 ◽  
Author(s):  
Abdelaziz Lakehal ◽  
Fares Laouacheria
Keyword(s):  
Decision Making ◽  
Bayesian Networks ◽  
Bayesian Network ◽  
Water Distribution ◽  
Distribution Network ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Dynamic Bayesian Networks ◽  
Water Distribution Networks ◽  
Network Rehabilitation

AbstractWater plays an essential role in the everyday lives of the people. To supply subscribers with good quality of water and to ensure continuity of service, the operators use water distribution networks (WDN). The main elements of water distribution network (WDN) are: pipes and valves. The work developed in this paper focuses on a water distribution network rehabilitation in the short and long term. Priorities for rehabilitation actions were defined and the information system consolidated, as well as decision-making. The reliability data were conjugated in decision making tools on water distribution network rehabilitation in a forecasting context. As the pipes are static elements and the valves are dynamic elements, a Bayesian network (static-dynamic) has been developed, which can help to predict the failure scenario regarding water distribution. A relationship between reliability and prioritization of rehabilitation actions has been investigated. Modelling based on a Static Bayesian Network (SBN) is implemented to analyse qualitatively and quantitatively the availability of water in the different segments of the network. Dynamic Bayesian networks (DBN) are then used to assess the valves reliability as function of time, which allows management of water distribution based on water availability assessment in different segments. Before finishing the paper by giving some conclusions, a case study of a network supplying a city was presented. The results show the importance and effectiveness of the proposed Bayesian approach in the anticipatory management and for prioritizing rehabilitation of water distribution networks.

Study on Safety Evaluation Method for Water Distribution Networks Based on LS-SVM

2011 ◽  
Vol 243-249 ◽  
pp. 5003-5008
Author(s):  
Zhi Tao Wang ◽  
Jing Yu Su ◽  
Wei Wang
Keyword(s):  
Water Distribution ◽  
Distribution Network ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Influential Factors ◽  
Water Distribution Networks ◽  
Security Level ◽  
Urban Water ◽  
Ann Model ◽  
Svm Model

To evaluate the security of urban water distribution network, one model based on LS-SVM was put forth. On the basis of summary and analysis of influential factors for urban water distribution network security, a set of indexes used in the evaluation model above was constructed. The nonlinear mapping between the water distribution networks security classification and its conditions were learned from the finite samples and a water distribution network example was simulated using this model. In addition, the BP ANN model was used to simulate the same example. Through the analysis of the result of the actual security level, the security level acquired by the LS-SVM model and BP ANN model, it may be found that the result acquired by the LS-SVM model has high accuracy, and may used in actual engineering.

Hydraulic performance of post-earthquake water distribution networks based on head driven simulation method

2013 ◽  
Vol 13 (5) ◽  
pp. 1281-1288 ◽  
Author(s):  
A. Mani ◽  
M. Tabesh ◽  
M. R. Zolfaghari
Keyword(s):  
Urban Areas ◽  
Water Distribution ◽  
Performance Indicator ◽  
Distribution Network ◽  
Water Distribution Network ◽  
Simulation Method ◽  
Distribution Networks ◽  
Hydraulic Performance ◽  
Water Distribution Networks ◽  
Actual Performance

Water distribution networks are one of the most important infrastructures in urban areas. Evaluating their real hydraulic performance after being damaged by earthquake loadings is crucial for future planning. In this study, pipeline damage caused by seismic wave propagation is modelled using relationships obtained from 1994 Northridge earthquake. Damaged network is hydraulically analysed using the head driven simulation method (HDSM). This analysis helps to obtain actual performance of the water distribution network damaged by seismic waves, without the usual need to handle negative nodal pressures generated from demand driven simulation method. Pressure performance indicator and the total leakage of the network are used as indicators to show the hydraulic performance of the system. Comparison of the damages from different seismic scenarios and the hydraulic indicators of the network, illustrate the probable condition of the water distribution network after the earthquake. The proposed methodology is applied on a reservoir zone of the Tehran water distribution network. The results indicate the degree of damage in terms of pipe burst and leak points in this network.

scholarly journals Optimal Design of and Transition towards Water Distribution Network Blueprints

Proceedings ◽  
2018 ◽  
Vol 2 (11) ◽  
pp. 584
Author(s):  
Ina Vertommen ◽  
Karel van Laarhoven ◽  
Peter van Thienen ◽  
Claudia Agudelo-Vera ◽  
Tjakko Haaijer ◽  
...  
Keyword(s):  
Optimal Design ◽  
The Netherlands ◽  
Water Distribution ◽  
Distribution Network ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Hydraulic Performance ◽  
Transition Phase ◽  
Water Distribution Networks ◽  
Construction Sites

The design of network blueprints (ideal design of water distribution networks taking into account the existing infrastructure) is optimized considering the minimization of costs while satisfying the required pressure and flow velocities. The optimal transition from the existing infrastructure towards the blueprint is described by the minimization of pipe failures or maximization of hydraulic performance and the number of construction sites, where old pipes are replaced by new ones, in each transition phase. Both problems are solved with Gondwana. An application to the network of Helmond-Mierlo (The Netherlands) shows that the costs for the optimized blueprint are only 64% of those from the currently existing infrastructure, while the hydraulic performance is improved. The optimized transition shows that a larger number of intervention sites allows for a higher reduction of pipe failures and a better hydraulic performance of the network.

scholarly journals Sensor Placement in Water Distribution Networks based on Spectral Algorithms

10.29007/whzr ◽  
2018 ◽  
Author(s):  
Armando Di Nardo ◽  
Carlo Giudicianni ◽  
Roberto Greco ◽  
Manuel Herrera ◽  
Giovanni Francesco Santonastaso ◽  
...  
Keyword(s):  
Water Distribution ◽  
Distribution Network ◽  
Sensor Placement ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Data Availability ◽  
Water Distribution Networks ◽  
Monitoring And Control ◽  
Network Graph ◽  
Spectral Techniques

Installing an efficient monitoring and control sensor system provides the possibility to carry out main tasks on Water Distribution Networks (WDNs) management and protection. Given the WDNs complexity, efficient numerical techniques are needed to support optimal monitoring system design. Generally, it is appropriate to locate sensors at highly connected places in the WDN with water flow reaching several parts of the network. This paper introduces a general method to support water utilities on the decision making process for an efficient water system monitoring. The proposal is based on graph spectral techniques that take advantage on spectrum properties of the adjacency matrix of the water distribution network graph. It is consequently created a novel tool-set of graph spectral techniques adapted to improve the water monitoring tasks and consequently simplify further sensor placement. This is approached with no need of hydraulic simulation, as data availability is often limited or not suitable to face anomaly events changing assets and distribution performance. A real water distribution network serving a town near to Naples is used to analyze the proposed graph spectral methodology. In order to test the proposed procedure, a comparison was made with a sensor layout obtained through a bi-objective optimization, through some performance indicators. The results confirm the effectiveness of the proposed spectral procedure.

“Virtual Archaeology” in Light of a New Document on the Topkapı Palace’s Waterworks and Earliest Buildings, circa 1509

2014 ◽  
Vol 30 (1) ◽  
pp. 315-350
Author(s):  
Gülru Necipoğlu
Keyword(s):  
Water Distribution ◽  
Distribution Network ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Water Jet ◽  
Water Distribution Networks ◽  
Virtual Archaeology

This article introduces an unpublished document concerning the water distribution network of the Topkapı Palace. Preserved in the Topkapı Palace Museum Archive, the undated document sheds light on not only the palace’s waterworks but also the locations and names of its earliest buildings. Clues suggest that it was written immediately after the 1509 earthquake. Its heading reads: “Description of the fountains and water jet fountains, some of which have been flowing since olden times and some of which were added later.” This oldest written source on the hydraulic landscape of the Topkapı Palace elucidates the original layout of the palace complex. It refers to the two architects responsible for this project as ʿAcem Miʿmar and Miʿmar Hamza, who are identified in this article as the chief architect who preceded Mimar Sinan, namely, Miʿmar ʿAlaʾüddin, nicknamed ʿAcem ʿAli (Persian ʿAli), and his son Hamza. The document is significant for understanding the water distribution networks and layout of the palace before a rebuilding campaign in the 1520s under this first chief architect of Sultan Süleyman.

scholarly journals Research on Sensor Placement for Disaster Prevention in Water Distribution Networks for Important Users

2020 ◽  
Vol 12 (2) ◽  
pp. 723 ◽  
Author(s):  
Jiajia Wu ◽  
Donghui Ma ◽  
Wei Wang ◽  
Zhao Han
Keyword(s):  
Water Distribution ◽  
Distribution Network ◽  
Sensor Placement ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Water Distribution Networks ◽  
Impact Factors ◽  
Urban Water ◽  
Disaster Prevention ◽  
The Impact

Sensor placement for disaster prevention for important users in urban water distribution networks is essential for post-earthquake monitoring and repair. Herein, we proposed a sensor placement approach for disaster prevention monitoring for important users, to (a) improve the fault diagnosis ability of the water distribution network and to (b) guarantee the function of emergency services for key nodes after an earthquake. First, an evaluation system of node users’ disaster prevention impact factors was presented to evaluate the node influence degree from three aspects: post-earthquake leakage, emergency support and topology structure; and the weight values of node users’ disaster prevention impact factors were obtained. Second, a post-earthquake hydraulic analysis model based on the pressure-driven demand was used to calculate the water shortage ratio of nodes. Third, using the three-way clustering integration method, the results of four clustering techniques were integrated to divide the monitoring domain in the water distribution network based on sensitivity analysis. Finally, on basis of the sensitivity matrix, the division of the monitoring area and the impact factors of node users’ disaster prevention were combined to place sensors for post-earthquake disaster prevention in the water distribution network. Detailed computational experiments for a real urban water network in China were performed and compared with the results of other traditional techniques to evaluate the performance of the proposed approach. The results show that the approach is better than traditional methods. It not only considers the actual hydraulic information of the water distribution network, but also the important user nodes after an earthquake, and is of great significance for emergency command and rescue and disaster relief after an earthquake in the city.

scholarly journals USAGE OF SCALES WITH DIFFERENT NUMBER OF GRADES FOR PAIR COMPARISONS IN DECISION SUPPORT SYSTEMS

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
Vitaliy V Tsyganok ◽  
Sergii V Kadenko ◽  
Oleh V Andriichuk
Keyword(s):  
Decision Making ◽  
Decision Support ◽  
Decision Support Systems ◽  
Support Systems ◽  
Single Pair ◽  
Multi Criteria Decision Making ◽  
Technology Usage ◽  
Pair Comparison ◽  
Pair Comparisons ◽  
Original Approach

<p>In this paper we suggest an original approach to conducting individual pair comparisons during individual and group multi-criteria decision-making (including AHP/ANP-based decisions). With this approach every expert is given an opportunity to use the scale, in the degree of detail (number of points/grades) that most adequately reflects his/her competence in the issue under consideration for every single pair comparison. Before aggregation all separate expert estimates (judgments) are brought to a unified scale, and scales in which these judgments were built are assigned respective weights. A respective instrument for pair comparison conduction has been developed, and an experiment has been organized. The experiment statistically proves that as a result of suggested technology usage, there is an increase in the degree of correspondence between estimates, input by an expert, and his (her) own notions on examination objects.</p>

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