Use of district metered areas coupled with pressure optimisation to reduce leakage

2008 ◽  
Vol 8 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Bambos Charalambous
Keyword(s):  
Water Loss ◽  
Distribution Systems ◽  
Water Distribution ◽  
Task Force ◽  
Early Stage ◽  
Supply And Demand ◽  
Integrated Approach ◽  
Water Shortage ◽  
Climatic Conditions ◽  
Water Losses

Water shortage and the future threat posed by changing climatic conditions has intensified the need for the development of appropriate water management approaches, which aim at keeping a balance between water supply and demand. Losses from water distribution systems must be of concern to every water utility, especially in areas of our planet where water is found in very limited quantities. It is therefore imperative that water utilities apply simple and effective methodologies in accounting for water losses from their transmission and distribution systems. The Water Loss Task Force (WLTF) of the International Water Association (IWA) has established a water audit method, which traces water from its source right through the system and derives at the end the revenue and non-revenue component, in other words is a methodology for water accountability and an integrated approach to water loss control. The Water Board of Lemesos, Cyprus recognised at a very early stage the importance and significance of establishing a proper water audit system and has over the years developed its infrastructure in such a way in order to be able to account efficiently and accurately for all water produced. Reduction and control of water loss was achieved through the application of a holistic strategy based on the approach developed by the WLTF of the IWA. Integral part of this approach is the establishment and operation of DMAs.

Reduction in water losses in water distribution systems using pressure reduction valves

2016 ◽  
Vol 16 (4) ◽  
pp. 1033-1045 ◽  
Author(s):  
Carmine Covelli ◽  
Luigi Cimorelli ◽  
Luca Cozzolino ◽  
Renata Della Morte ◽  
Domenico Pianese
Keyword(s):  
Water Loss ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution Systems ◽  
Physical Modelling ◽  
Optimal Choice ◽  
Pressure Reduction ◽  
Water Losses ◽  
Excessive Pressure ◽  
Pipe Replacement

Water loss is a phenomenon frequently observed within water distribution systems (WDSs), that is considerably worsened by an excessive pressure throughout the network. As an alternative option to pipe replacement, the use of pumps working as turbines, throttle control valves (TCVs), or pressure reduction valves (PRVs) can be used to reduce leakage. For a preassigned number of these devices, their positions and settings can be chosen to minimize the water losses in the network or to minimise the costs associated with the leakage. On the other hand, for a preassigned reduction in leakage, the number, the position and the setting of valves could be optimized in order to minimize their installation and maintenance costs. Based on these observations, a procedure for the optimal choice of the number, position and setting of PRVs is devised. The procedure is aimed at reducing the whole cost associated with water loss in urban WDSs, due to the background leakage from joints, and the purchase, installation and maintaining of the PRVs themselves. The effectiveness of the procedure, which is based on the physical modelling of leakage from pipe joints as well as on the use of a genetic algorithm, is proven using a small but realistic example.

Expertise in water loss control applied to extreme problems of water distribution management

2008 ◽  
Vol 8 (1) ◽  
pp. 107-112 ◽  
Author(s):  
Tim Waldron
Keyword(s):  
Water Loss ◽  
Distribution Systems ◽  
Water Distribution ◽  
Distribution Networks ◽  
Water Losses ◽  
Distribution Management ◽  
Best Management ◽  
Water Association ◽  
International Water ◽  
Loss Control

The application of International Water Association guidelines to control water losses provides a foundation for new methods and psychologies for controlling Water Distribution Systems. Best management techniques utilizing International Water Association water loss control methodologies compared to totally open distribution networks can now be supported for analysis scenarios using both network analysis and genetic algorithms.

DETERMINANTS OF NON-REVENUE WATER

2021 ◽  
Vol 6 (1) ◽  
pp. 642
Author(s):  
Haslinda Ab Malek ◽  
Mohamad Hafizi Zakaria ◽  
Muhammad Luqman Zulkifli ◽  
Nur Farahin Roslan
Keyword(s):  
Water Distribution ◽  
Water System ◽  
Multiple Linear Regression Model ◽  
Water Shortage ◽  
Water Losses ◽  
Efficient Management ◽  
The People ◽  
Water Plant ◽  
Production Quantity ◽  
Non Revenue Water

Water is one of the most essential needs in human daily life. Water losses or Non-Revenue Water (NRW) refers to the treated water that has been produced from water plant which did not reach to the customer. This waste of water has caused the company to suffer losses and hence, burdens the people with increasing water tariff. Moreover, it becomes one of the challenges for commercial water system management because the water company must fulfil the demand from the society which keep increasing day by day. In addition, the demand for water is increasing, as the population is growing. Despite having the rainfall throughout the year in Malaysia, many cities are experiencing water shortage and frequent water supply disruptions. Therefore, efficient management of water distribution is required to minimise the water losses and to make sure the sustainability of water reserve for a long period. This study focuses on identifying the significant factors that influence the Non-Revenue Water and modelling the data using Multiple Linear Regression Model. The sample size used in this study were 212 observations and the variables involved were Length of Connection, Number of Connection, Production Quantity, Consumption Quantity and Non-Revenue Water. It is found that the variables of Number of Connection, Consumption Quantity and Production Quantity were significant to Non-Revenue Water whereas the variable of Length of Connection was not significant. It is hoped that the result from this study can be used by the water authority company in improving the water distribution and thus reduce water losses and cost.

scholarly journals Water Loss Management in Small Municipalities: The Situation in Tyrol

Water ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 3446
Author(s):  
Martin Oberascher ◽  
Michael Möderl ◽  
Robert Sitzenfrei
Keyword(s):  
Low Income ◽  
Water Loss ◽  
Water Distribution ◽  
Management Strategies ◽  
Measurement Data ◽  
Distribution Networks ◽  
Support Network ◽  
Federal State ◽  
Water Losses ◽  
Water Loss Management

Water losses in water distribution networks (WDNs) are unavoidable. Water losses are evaluated based on performance indicators (PIs) and used for future recommendations for network operators to take measures against water losses. However, these evaluations primarily focus on large and medium sized WDN and do not deal with the challenges of small WDNs (e.g., technical, and financial limitations, missing data). Therefore, an appropriate water loss management is a major challenge for operators in the federal state of Tyrol (Austria) due to the high number of small WDNs, e.g., low income in combination with long network lengths. In this regard, this work specifies and discusses state funding in Austria to support network operators to reduce water losses. To assess the impacts on management strategies, 40 WDNs, supplying 200 to 16,000 inhabitants, are investigated in detail. As the comparison of different PIs shows, a volume related PI (e.g., water loss volume divided by total water demand) is recommend as the decision criterion for local authorities due to minimal efforts and its easy calculation. Moreover, public funding helps to significantly reduce water losses in individual systems, but countermeasures should be different for small and larger WDNs. For example, leakage detection campaigns and rehabilitation planning based on pipe age should be established in future for larger WDNs in Tyrol. In contrast, an online flow metering system to monitor system inflows is suggested for small WDNs. Based on measurement data, leakages and burst can be detected and repaired swiftly.

An integrated approach to water distribution network monitoring and performance prediction using geographical information systems

2003 ◽  
Vol 3 (1-2) ◽  
pp. 307-312 ◽  
Author(s):  
M. Poulton
Keyword(s):  
Decision Making ◽  
Geographical Information Systems ◽  
Distribution Systems ◽  
Water Distribution ◽  
Prediction Models ◽  
Process Integration ◽  
Water Distribution Network ◽  
Integrated Approach ◽  
Geographical Information ◽  
Measurement Technology

The deterioration of water distribution systems and the subsequent need for major rehabilitation has provided researchers with a challenge: to seek new techniques to facilitate decision-making and assist network planners. Consequently, a range of methods have been developed, concerning several key performance indicators. Those with the greatest potential tend to promote a pro-active approach to pipeline rehabilitation, by predicting future performance of individual or groups of pipes. Such an approach is essential if cost-effective solutions are to be found. Prediction models are based on indicators that are perceived to be the most appropriate for measuring and comparing an aspect of performance. The level of “appropriateness” is influenced not only by the availability of data and the ease at which it can be recorded, but also its accuracy and unambiguity. Consequently, indicators such as burst rates are widely used to assess structural performance. Ideally though, a more direct measure of the condition of a pipe could be used, such as its remaining wall thickness. This has previously been largely disregarded, due to the lack of appropriate (non-destructive) measurement technology. However, technological advances are being made to enable the inline monitoring of pipes and determination of deficiencies (particularly corrosion pits in cast iron pipes). This paper illustrates how online condition monitoring of distribution pipelines can be combined with existing prediction models, to facilitate the decision-making process. Integration is achieved through the use of a Geographical Information System (GIS), which greatly enhances representation of spatial and temporal information.

scholarly journals Integrating water distribution system efficiency into the water conservation strategy for California: a Los Angeles perspective

Water Policy ◽  
2017 ◽  
Vol 19 (6) ◽  
pp. 1030-1048 ◽  
Author(s):  
Kartiki S. Naik ◽  
Madelyn Glickfeld
Keyword(s):  
Water Management ◽  
Los Angeles ◽  
Water Loss ◽  
Water Conservation ◽  
Distribution System ◽  
Water Distribution ◽  
Conservation Strategy ◽  
Water Losses ◽  
High Data ◽  
Distribution Efficiency

Abstract Improving water management in California requires a transition from imported to local water resources used efficiently. To assess this transitional capacity of water retailers in metropolitan Los Angeles County, we focused on a key water management metric: the water distribution efficiency. We traced the evolution of water loss reduction policy and practices globally with emphasis on California. California Senate Bills 1420 and 555 mandate annual water auditing and reporting for urban water suppliers. We surveyed and evaluated ten water retailers' approaches to monitor and reduce losses. Four of ten sampled water retailers monitored real losses, averaging 3–4% of total water supplied. Only three of ten sampled water retailers employed leak detection technology. Of the six sampled retailers with annual pipe replacement strategies, four retailers followed inadequate rehabilitation schedules. Most of the sampled retailers monitor water losses in percent, which misrepresents the actual volume. While a necessary step, California water loss legislation relies on the American Water Works Association Water Audit software. Verifying reported data for randomly selected retailers can ensure high data quality. Small retailers are exempt from mandatory water loss monitoring, and they need state support and resource pooling to improve their water distribution efficiency.

scholarly journals Water Loss Reduction in Water Distribution Networks. Case Study

2019 ◽  
Vol 9 (1) ◽  
pp. 73-80
Author(s):  
Anca Hoțupan ◽  
Roxana Mare ◽  
Adriana Hădărean
Keyword(s):  
Water Flow ◽  
Water Loss ◽  
Water Distribution ◽  
Potable Water ◽  
Distribution Network ◽  
Distribution Networks ◽  
Water Distribution Networks ◽  
Water Losses ◽  
Supply Pipe ◽  
Looped Network

Abstract Water losses on the potable water distribution networks represent an important issue; on the one hand, water loss does not bring money and on the other hand, they modify water flow and pressure distribution on the entire system and this can lead to a cut-off of the water supply. A stringent monitoring of the water distribution network reduces considerably the water losses. The appearance of a leakage inside the distribution network is inevitable in time. But very important is its location and repair time – that are recommended to be as short as possible. The present paper analyses the hydraulic parameters of the water flow inside a supply pipe of a looped network that provides potable water for an entire neighbourhood. The main goals are to optimize these parameters, to reduce water losses by rigorous monitoring and control of the service pressure on the supply pipe and to create a balance between pressure and water flow. The presented method is valid for any type of distribution network, but the obtained values refer strictly to the analysed potable water distribution looped network.

scholarly journals Losses in water distribution networks – a bibliometric review: general aspects and optimization

2021 ◽  
Vol 10 (12) ◽  
pp. e407101220659
Author(s):  
Emerson Pessanha de Almeida ◽  
Fernando das Graças Braga da Silva ◽  
Victor Eduardo de Mello Valerio
Keyword(s):  
Bibliometric Analysis ◽  
Distribution Systems ◽  
Water Distribution ◽  
State Of The Art ◽  
Distribution Networks ◽  
Current Situation ◽  
The State ◽  
Water Distribution Networks ◽  
Water Losses ◽  
General Aspects

The research carried out in the water distribution networks is of great importance, given the social, environmental and economic impacts that have occurred due to the scarcity of water resources. Therefore, any scientific effort shown in research that studies water distribution systems is of great relevance. Techniques such as mathematical modeling, computer simulation and statistical methods are widely used in order to obtain more reliable answers, whether for the identification of the current situation of the network, as well as for the prediction of scenarios, failure events, increased demand, etc. The objective of this work is to carry out a bibliometric analysis to identify the state of the art of research that addresses the theme of water distribution networks for the control and reduction of the volume of water losses, which will serve as a guide for future works to to structure itself in the most relevant researches that study the theme. The developed methodology was able to analyze a metadata composed of 4188 documents taken from the Web of Science journals database. As a result, a geographical view of the theme was obtained, pointing out the main countries, affiliations, journals and researchers, as well as pointing out the main documents and relevance of the theme. It can be concluded after the results obtained that bibliometric analysis is an important tool for obtaining the state of the art. With it is possible to have a better understanding of the current situation in the development of research, familiarizing researchers with what is most current and relevant.

scholarly journals Average Operating Pressure Effect on Water Supply Systems Performances. A Case Study for 12 Romanian Small Water Distribution Networks

2021 ◽  
Vol 11 (2) ◽  
pp. 143-150
Author(s):  
E. Vitan ◽  
Anca Hotupan ◽  
Adriana Hadarean
Keyword(s):  
Performance Evaluation ◽  
Water Loss ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution Systems ◽  
Distribution Networks ◽  
Water Supply Systems ◽  
Operating Pressure ◽  
Water Network ◽  
Small Water

Abstract The performance evaluation of an implemented water distribution network is in tight relation with the choice of adequate measures for water loss reduction. Hence, the consequences of placing the water network in a wrong performance category are bad and will conduct to unreasonably costs or considerable water loss volumes. Therefore, the evaluation of the water network performance level based on both Non-Revenue Water (NRW) and Infrastructure Leakage Index (ILI) indicators is to be recommended. This paper deals with the performance evaluation of water distribution systems based on the calculated performance indicators NRW and ILI. For this purpose, collected data for a period of one year from 12 Romanian small water distribution systems and two simplified average pressure determination methods were used.

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