scholarly journals Research Methodology of Water Network Failure in Terms of Reneval / Metodologia Badania Awaryjności Sieci Wodociągowej w Aspekcie Jej Odnowy

2015 ◽  
Vol 33 (1) ◽  
pp. 233-242 ◽  
Author(s):  
Katarzyna Pietrucha-Urbanik ◽  
Barbara Tchórzewska-Cieślak
Keyword(s):  
Water Supply ◽  
Main Element ◽  
Water Services ◽  
Supply Network ◽  
Water Network ◽  
Water Losses ◽  
Water Supply Network ◽  
Network Failure ◽  
Strategic Plans ◽  
Quality Water

Abstract The important and crucial issue concerning water supply functioning in terms of conducting failure analysis were discussed. In the work failure indicators, water losses and availability of water services, that define standards of quality water services and their values were determined based on data from exploitation. In order to understand the current situation of water supply infrastructure it is necessary to perform periodic analyzes of water supply network failure, which was proposed in this paper. A detailed analysis of the failure and the water loss of the water supply network should be the main element of the urban management water supply network, particularly in the strategic plans for its modernization.

scholarly journals Bayesian Inference in the Analysis of the Failure Risk of the Water Supply Network

2019 ◽  
Vol 49 (3) ◽  
pp. 433-450 ◽  
Author(s):  
Barbara Tchórzewska-Cieślak ◽  
Janusz R. Rak ◽  
Dawid Szpak
Keyword(s):  
Bayesian Inference ◽  
Water Supply ◽  
Conditional Probability ◽  
Water Distribution ◽  
Posteriori Probability ◽  
Supply Network ◽  
Water Losses ◽  
Water Supply Network ◽  
A Posteriori Probability ◽  
Network Failure

Abstract One of the basic subsystems of the collective water supply system is the water distribution subsystem which has a direct impact on the reliability and safety of water supply to consumers. Failures of water pipes may cause water losses (leaks), interruptions in the water supply to consumers and can be the cause of secondary water pollution in the water supply network. It was proposed to use Bayesian inference to locate failures on the water supply network and to determine a posteriori probability of water network failure. It was found that the conditional probability of distribution water supply network failure is definitely higher than the conditional probability of home connections failure. The research results should be used by the water supply company during the development of an operational strategy for the renovation and modernization of the water supply network.

scholarly journals Failure risk assessment in water network in terms of planning renewals – a case study of the exemplary water supply system

2017 ◽  
Vol 12 (2) ◽  
pp. 274-286 ◽  
Author(s):  
K. Pietrucha-Urbanik ◽  
B. Tchórzewska-Cieślak
Keyword(s):  
Risk Assessment ◽  
Water Supply ◽  
Real Data ◽  
Supply System ◽  
Water Supply System ◽  
Supply Network ◽  
Water Network ◽  
Water Supply Network ◽  
Network Failure ◽  
Failure Risk

In the paper the issue of failure risk assessment in water supply system (WSS) was presented. Problems of water supply network failure constitute a crucial issue in waterworks practice. The results of the analysis were obtained on the basis of real data from water network operation. Attention has been paid to the problem of risk assessment in the context of risk acceptance criteria. An example of criteria application was shown for the exemplary water supply network. The water network indicators: failure frequency, time of failure removal, repair time and intensity of renewal, were calculated. The obtained information was used to describe the general characteristics of the examined system and the technical conditions of the WSS. The performed analysis can be used in the assessment of future failure prediction of the water supply network.

scholarly journals Wise use of water in smart cities - possibilities and limitations

2018 ◽  
Vol 30 ◽  
pp. 01014
Author(s):  
Joanna Bąk
Keyword(s):  
Water Supply ◽  
Water Consumption ◽  
Smart Cities ◽  
Classification Systems ◽  
Supply Network ◽  
Water Efficiency ◽  
Water Supply Network ◽  
Quality Water ◽  
Reduced Water

The need to save water is due, inter alia, to the paradigm of sustainable development. There are many ways to minimize the consumption of high quality water supplied by the water supply network. These include the simplest way and those complex, requiring additional installation. The lack of water is a big problem, but not only water deficit are dangerous. There is a possibility of secondary water pollution in the water supply network due to changes in network parameters. Changes in these parameters may occur due to reduced demand for water by residents and, as a result, reduced water flow - at the same pipe diameter. The article includes a review with comparative analysis of various classification systems for the tap fittings and other sanitary equipment, such as the Water Efficiency Label (WELL) in Europe or the Water Efficiency Labelling and Standards (WELS) in Australia. Several types of perlators and flow regulators were compared in the research section. This equipment was tested in the household. The possibilities of minimizing water consumption by using them was collated. In addition, the work also analyses the evolution of water consumption in Poland in recent years and their possible relationship with the threats quality of drinking water supplied to consumers.

scholarly journals Quality Analysis of Water Network Failure

2018 ◽  
Vol 47 (1) ◽  
pp. 67-85 ◽  
Author(s):  
Barbara Tchórzewska-Cieślak ◽  
Dawid Szpak ◽  
Izabela Piegdoń ◽  
Anna Szlachta
Keyword(s):  
Water Supply ◽  
Failure Rate ◽  
Quality Analysis ◽  
Material Structure ◽  
Supply Network ◽  
Water Supply Network ◽  
Network Failure ◽  
Rate Analysis ◽  
Provincial City ◽  
Water Supply Company

Abstract The main objective of the study was to analyse and assess the failure rate of the water supply system of a provincial city located in south-eastern Poland. In the analysis the exploitation data provided by the water supply company were used. The received data include, among others, material structure, age of water supply network and failure log. The failure rate analysis of the water supply network was based on the failure rate index λ [failure/(km∙year)]. Based on the performed analysis, it was found that the water company should consider renovating or replacing steel pipes.

scholarly journals Detection and Localization of Water Leaks in Water Nets Supported by an ICT System with Artificial Intelligence Methods as a Way Forward for Smart Cities

2019 ◽  
Vol 11 (2) ◽  
pp. 518 ◽  
Author(s):  
Izabela Rojek ◽  
Jan Studzinski
Keyword(s):  
Water Supply ◽  
Smart Cities ◽  
Urban Transport ◽  
Geographical Information ◽  
Material Structure ◽  
City Management ◽  
Supply Network ◽  
Water Losses ◽  
Water Supply Network ◽  
It Systems

The last decade has seen the development of complex IT systems to support city management, i.e., the creation of so-called intelligent cities. These systems include modules dedicated to particular branches of municipal economy, such as urban transport, heating systems, energy systems, telecommunications, and finally water and sewage management. In turn, with regard to the latter branch, IT systems supporting the management of water supply and sewage networks and sewage treatment plants are being developed. This paper deals with the system concerning the urban water supply network, and in particular, with the subsystem for detecting and locating leakages on the water supply network, including so-called hidden leakages. These leaks cause the greatest water losses in networks, especially in old ones, with a very diverse age and material structure. In the proposed concept of the subsystem consisting of a GIS (Geographical Information System), SCADA (Supervisory Control and Data Acquisition) system and hydraulic model of the water supply network, an algorithm of leak detection and location based on the neural networks’ MLP (multi-layer perceptron) and Kohonen was developed. The algorithm has been tested on the hydraulic models of several municipal water supply networks.

Technics, science and management related to the evolution of water supply network of La Rochelle city, France, from 1864 to 1913.

2020 ◽  
Author(s):  
Frederique Moreau
Keyword(s):  
Water Supply ◽  
Local Governments ◽  
Efficient Solutions ◽  
Supply Network ◽  
Water Network ◽  
Supply Networks ◽  
Water Supply Network ◽  
Sound Theory ◽  
Fluids Mechanics ◽  
Ease Of Access

<p><span>The water issue, as vital element to be protected, is central in all societies, including those where water may seem plentiful. With the conscience of the fragility of this resource, the need to question the evolution of the perception of water over time, of the various means used to exploit and preserve it, of scientific knowledge, currently appears as an essential aid to the decision for its preservation.</span></p><p><span>In many countries, XIXs century was the time of major progress in the construction of water supply networks of cities. Particularly in France, this progress was spured by an hygienist discourse in a context of increase city population, inducing a social demand whose national and local governments seized.The autority of the engineers of the « corps des Ponts et Chaussées » who were in charge of the technical realisation of the cities water network was also an important support in this progress, especially because they also participated at the great evolution of the scientific formulation of fluids mechanics applied to groundwater hydraulic like Henry Darcy (1803-1858) or Jules Dupuit (1804-1866). <span>The latter is also well known as an economist. One of his th</span><span>oughts</span><span> is to relate the progress of science to an economic perspective. According to him, « The only difference between the [Roman water ] distributions and those which would be made according to a sound theory and with the best practical procedures is entirely in the expenditure.”</span></span></p><p><span>In this study, technical, scientific and management aspects of the evolution of the water supply network of La Rochelle (France ) during the XIXs century are investigated from archives documents. The survey of the conditions for setting up the network of a particular city is a gateway to address all the points cited above. This coastal town, which has a long history and whose port is famous, experienced three stages of improvement of its water network, in 1864, 1883 and 1913. The first step coincides with the development of water supply network of many french towns, the second with the discovery of a new aquifer useable for water supply of the city, and the third one, remained at the state of a project due to the first World War, had been planned in response of the increase of water consumption linked both to the growing of the population and to the new ease of access to water.</span></p><p><span>This historical knowledge is necessary to understand the spatial and time evolution of the customary practice of water and could be used to draw one’s inspiration from the past efficient solutions that have sometimes be forgotten and that could be reemployed.</span></p>

scholarly journals Seasonality of water supply network failure in the aspect of water supply safety

2018 ◽  
Vol 44 ◽  
pp. 00140 ◽  
Author(s):  
Izabela Piegdoń ◽  
Barbara Tchórzewska-Cieślak
Keyword(s):  
Water Supply ◽  
Water Supply Systems ◽  
System Failure ◽  
Supply Network ◽  
Water Supply Network ◽  
Network Failure ◽  
Water Supply Company ◽  
Supply Systems ◽  
Special Case ◽  
Operational Data

Many phenomena are characterized by unevenness and variability in time, so-called periodic fluctuations, of which seasonal variations are a special case. In water supply systems, the failures of water pipes are also characterized by unevenness during the year. Seasonality is especially evident when the failures are analysed at particular times of the year. The main purpose of this paper is to present the problems of failures in water supply network caused by seasonal changes, to determine seasonal indicators and to give an example of the system failure analysis for the selected city of south-eastern Poland. The analysis was based on actual operational data obtained from water supply company.

scholarly journals Impact of monitoring on the mean time to repair of the water supply network

2018 ◽  
Vol 44 ◽  
pp. 00101
Author(s):  
Magdalena Łój-Pilch ◽  
Anita Zakrzewska
Keyword(s):  
Water Supply ◽  
Distribution System ◽  
Water Distribution ◽  
Repair Time ◽  
Supply Network ◽  
Water Losses ◽  
Water Supply Network ◽  
Quality Of Water ◽  
Before And After

The introduction of monitoring to a water supply network results in reducing its failure rate, increasing its reliability as well as improving the quality of water supplied to consumers, reducing water losses and increasing work safety in a water distribution system. Monitoring enables detection of leakages that could go unnoticed without this system, facilitates detection of leakages and location of failures, i.e. it shortens the repair time — or rather its component — the awaiting-repair time. This paper presents the results of the reliability analysis for a city located in the Upper Silesian Industrial Region before and after the implementation of monitoring to the water supply network.

scholarly journals Improvement of the Water-Energy Nexus and the Environmental Performance of Water Supply Systems using Smart ICT Solutions

2016 ◽  
Vol 11 (3) ◽  
pp. 679-689
Author(s):  
Jorge Helmbrecht ◽  
Matthias Maier ◽  
Esteban Morillo ◽  
Dirk Kühlers ◽  
Karl Roth
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Water Supply Systems ◽  
Supply Network ◽  
Network Efficiency ◽  
Water Losses ◽  
Water Supply Network ◽  
North West ◽  
Intelligent Software ◽  
Water Energy Nexus

In the last years, there has been a great interest in the complex interactions between energy and water, known as the Water-Energy Nexus.1 Free and unrestricted availability and access to energy and water enables the growth of an economy and supports the quality of life. The Water-Energy Nexus is considered as one of the most important multidisciplinary challenges2 that the water market globally growing has to face in the forthcoming years. Currently, many water systems are not managed in terms of long term sustainability. Water Utilities (WU) are faced to further challenges, such as aging of their infrastructure and poor cost-recovery, leading to a lack of finance for operation and maintenance (O&M). Energy is required in all stages of water production and distribution, from abstraction over treatment to transportation. Energy costs are a top-of-mind concern for WU, regardless of the geography, size and level of water network efficiency.3 On the other hand, in developing countries WU are having a hard time to either improve their services or expand their network to unserved neighbourhoods. Regarding all this facts, and considering an economic and competitive scenario which forces to respond to pressures from various fields (market, technology, society...), lead to the need to implement new methods and processes that can meet these growing demands and to try to manage responses and actions in real time. Intelligent software solutions can be applied to networks, whether they have either smart metering and large amounts of data or less recorded data. They enhance the operators’ knowledge of this data, turn it into useful information for decision-making related to the operation, maintenance and the design of the water supply network. In this paper, an application of an intelligent software solution is presented. WatEner, a smart Information and Communication Technology (ICT) solution that combines the key factors of energy consumption with further operational requirements of drinking water supply to improve the management of water supply networks, has been tested with good results by the WU of the city of Karlsruhe, a water rich area in North-West - Europe where the main objective was to save energy in the drinking water distribution. As a conclusion, a non-structural solution for the water-energy nexus can have a great impact on several matters (e.g. climate change, carbon footprint, WUs balance sheets, water losses) with reasonable investment in only a few sensors in the water supply network.

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