Showing results for: non-revenue water Articles
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Computation of Real & Apparent Losses through Pressure-Leakage Relationship Analysis
This is a method currently being used by Manila Water Company Incorporated (MWCI) in computing for the Real and Apparent Losses of a District Metering Area (DMA). This method utilizes Pressure-Leakage Relationship, and Total Non-Revenue Water comparisons to determine the volume and percentage of Real and Apparent Losses of DMA’s. The Total Non-Revenue Water of DMA’s is basically ...
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Developing a non-revenue water reduction strategy: planning and implementing the strategy
ABSTRACTA companion paper dealt with the tasks required to investigate and assess the components of non-revenue water (NRW). This is a necessary first step in a diagnostic approach to understanding the condition of the network, the way that it is operated, and the constraints acting upon it. This second part deals with the tasks and tools required to address the constraints, and to develop a ...
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1 - 20% Decrease in Hagihon`s NRW & Continuous Decline in Pipe Bursts Case Study
Results from a recent study by HaGihon indicate a substantial improvement in NRW (Non-Revenue-Water) in the DMAs in which Aquarius Spectrum’s system was installed and continuously operated during a period of two years (2014-2015). NRW was reduced in those neighborhoods by 20%, mainly due to locating and fixing hidden leaks and repairing malfunctioning equipment located by Aquarius. In ...
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The Challenge of Reducing Maynilad`s Non-Revenue Water
Non-revenue water (NRW), poses a very big challenge to many water utilities today. Reducing if not totally eliminating non-revenue water remains the primary concern not only in the Philippines and the Asian region but also world-wide, especially in these times where sources of drinking water supply is rapidly declining. Better and more efficient water supply management is needed to optimize ...
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Technical inefficiency effects in a stochastic production function for managerial incentives in public water utilities
Performance of state-owned water utilities in developing countries is often weak. This study estimates the impact of managerial incentives upon efficiency using a stochastic frontier production function with revenue water as the output. The empirical analysis utilises unbalanced panelled data consisting of revenue water, connections, operating expenditure, water delivered and staff, from ...
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Methodology for Optimal NRW Program Design
During 2009-2010, RTI International developed and published a financial model which calculates the financially optimum level of Non-Revenue Water (NRW). The model computes a steady-state target for NRW reduction and control programs, based on site conditions and local costs. The model was presented at IWA Water Loss Specialist Conferences in Cape Town and Sao Paulo and other international ...
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Complex city structure in Taipei - 13 leakages detected - Taipei, Taiwan - Case Study
In 2014, Leif Koch, DHI, and Ramböll partnered with the Taipei Office of the Trade Council of Denmark and the Taiwan Water Corporation for a pilot project to reduce water loss in Taiwan. These organizations sent a team of leakage engineers and operators to work at a test site on Chijin Island. Leif Koch trained Taiwan Water Corporation staff in advanced leak detection methods and ...
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Using flow meters to reduce non-revenue water
Utility managers are continually challenged to run water systems in the most efficient manner. Reducing non-revenue water (NRW) is an important component for system efficiency. In many states, regulators are placing caps on NRW or requiring reductions in the amount of NRW. Accurate and well-planned flow measurement can be used to locate areas of water leakage and reduce NRW. McCrometer is a ...
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Identifying the appropriate time band to determine the minimum night flow: a case study in Kinta Valley, Malaysia
The average percentages of non-revenue water (NRW) for Malaysia and for the state of Perak in 2010 were 36.37 and 29.44%, respectively. These average percentages have led to lower income generation. This could create constraints on maintenance and operation of water reticulation systems. In this study, the appropriate time band of minimum night flow (MNF) and the actual water loss or ...
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Tackling Non-Revenue Water by Identifying Small Leaks
Small leaks sink big ships – the same can be said for large-diameter pipes in utility networks. While large leaks or ruptures are seen as newsworthy stories accompanied by images of water flowing down the streets; smaller leaks can often be more devastating. Left undetected, they can add up over time, contributing significantly to Non-Revenue Water, and eventually, they too can lead to ...
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Non-Revenue Water – A Growing Issue for Water Utilities
Each day, billions of gallons of water are lost worldwide to various factors, including leaks, water main failures, theft and metering inaccuracies. Not only does this represent the waste of a precious resource that many people do not have reliable access to, it also represents a massive amount of lost revenue for the utilities that provide water services. In developed nations, Non-Revenue Water ...
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Reaching economic leakage level through pressure management
High non-revenue water (NRW) values as a percentage of system input volume form a serious problem that many water utilities worldwide have to confront nowadays. There are ways to mitigate the effect by adopting strategies with short- and long-term results. Water pressure management (PM) is one of the most efficient and effective NRW reduction strategies. To calculate pressure management of ...
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Non-revenue water and cost recovery in urban India: the case of Bangalore
This paper examines the issue of non-revenue water (NRW) in urban India, taking the city of Bangalore as a case study. Using empirical evidence from a survey conducted among 601 low-income households in Bangalore, we investigate the major sources of NRW for water utilities and propose policy recommendations based on the analysis. Our key finding is that public stand posts and public wells, ...
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Increasing automation and confidence in non-revenue water workflows with SensorClean
The global direct cost of non-revenue water (NRW) is 39 billion US dollars per year (Liemberger and Wyatt 2019). In large cities, reducing a small percentage of water loss can save tens of millions of dollars by deferring capital investment for new sources of water, such as desalination plants. NRW is a significant financial loss, uses valuable maintenance resources and doesn’t bode ...
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Applying incentives to increase revenue water in urban systems
The study utilises cross-sectional data from utilities of the National Water and Sewerage Corporation of Uganda to test application of extrinsic incentive theory on non-revenue water (NRW) reduction. Applying a multiple regression model, we find that the effect of level of incentive payments on revenue water (billing efficiency) depends on the amounts of staff inputs, service coverage and water ...
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Efficiency evaluation of urban water supply services in an Indian state
Water supply services in urban India are essential functions of urban local bodies or municipalities. These services are mostly perceived as unsatisfactory across urban centres and the sector is widely perceived to be misgoverned with large number of municipalities making financial losses. However, this common perception of inefficient services has not much scientific basis as the efficiencies ...
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Benchmarking process carried out under Performance Assessment System (PAS) in urban India
Access to water and sanitation services in urban India is widespread, but little is known about the quality and level of service, and coverage of the poor households. A key challenge in the sector in India is the lack of adequate and reliable information. Very little is known about the quantity of water made available to people, non-revenue water, quality of water and coverage of poor households. ...
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Benchmarking process carried out under Performance Assessment System (PAS) in urban India
Access to water and sanitation services in urban India is widespread, but little is known about the quality and level of service, and coverage of the poor households. A key challenge in the sector in India is the lack of adequate and reliable information. Very little is known about the quantity of water made available to people, non-revenue water, quality of water and coverage of poor households. ...
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Maximizing AMI investments through broader IIoT Insight
Advanced metering infrastructure (AMI) has received a lot of attention in recent years, typically regarding customer account billing. Other AMI uses within water distribution networks, however, can play equally important roles in reducing non-revenue water (NRW). Consider these contributions of networked flow meter use for automating better insights into water distribution ...
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Municipal water demand and efficiency analysis: Case studies in Turkey
The growing demand for municipal water due to population increase and urbanization impels water managers to reconsider the existing traditional supply-sided management approach. Strengthening of water demand management (WDM) policies by improving water use efficiency has been adopted as a key target in arid regions, in particular. Indeed, increasing the added value per m3 of water used is gaining ...
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