water loss Articles

  • Water Loss UK 2012

    In May 2005 a seminar was held at the NEC in Birmingham to introduce the UK water industry to the work of the International Water Association (IWA) Water Loss Task Force. A similar event was held at the NEC Crowne Plaza Hotel in June 2009. Both events were well received and attracted over 100 delegates. Since then the WLTF has become a Specialist Group in IWA due to the importance ...


    By IWA Publishing

  • Analysis of the net water loss in the main reach of the Yellow River

    In this study, several methods were employed to identify water losses in several reaches of the Yellow River. Then, a method for calculating the net water loss was developed. Also, annual, decadal and seasonal net water losses were analysed for the main reach of the Yellow River. Net evaporation, seepage and transmission per unit length of the river were estimated. The results showed that in the ...


    By Inderscience Publishers

  • Tackling water loss

    Water loss through leaks and non-revenue water are a global issue of monumental scale. A 2018 Consumer Council for Water report revealed that in England alone more than three billion litres of water are lost from leaking infrastructure every day, making water leakage the number-one concern for UK water utilities’ customers. Despite significant manpower-driven efforts to reduce leakage, it ...


    By Gutermann AG

  • Assessment of water loss in Harare, Zimbabwe

    A major challenge facing water utilities is the high level of water losses, which affects the financial viability and adequacy of water in the system. A study was carried out from January to May 2012 to characterize water losses in selected areas of Harare, Zimbabwe. Assessment of the contribution of water leakage to total water loss was carried out through water audits in four selected ...


    By IWA Publishing

  • Automated determination and evaluation of water losses in water distribution systems

    Using conventional methods and tools for determining detailed zonal water balances and performance indicators involves considerable efforts in manual data collection and processing. Hence, water balances mostly are determined for a whole network only. Unmetered components are often neglected or based on rough estimates. This article presents an approach to the automated determination of zonal ...


    By IWA Publishing

  • Cardiovascular metrics and transepidermal water loss in a high heat risk environment

    Heat stress is currently primarily classified by environmental factors and not physiological factors. It is already known that certain cardiovascular metrics such as heart rate, stroke volume, blood pressure and vascular compliance undergo changes as the body traverses the different classifications of heat stress from heat oedema to heat stroke. However, there is no specific metric that provides ...


    By Inderscience Publishers

  • Strategic Planning for Water Loss Reduction with Imprecise Data

    Water utilities particularly in the developing countries continue to operate with considerable inefficiencies in terms of water and revenue losses. With increasing water demand and scarcity, utilities require effective strategies for optimum use of available water resources. Often the information needed for strategic planning is inadequate and decisions have to be made on the basis of limited and ...


    By IWA Publishing

  • A model to simulate leakage through joints in water distribution systems

    The water loss is a phenomenon frequently observed within water distribution systems. A considerable part of water losses occurs either because of the incorrect assembly of joints or because of the fatigue and ageing of the material used to ensure a watertight seal. Moreover, such a leakage is very difficult to detect and to assess. In this work, we present a novel formulation for modelling the ...


    By IWA Publishing

  • Detecting leaks through AMR data analysis

    Automatic meter reading (AMR) provides real-time consumption data, enabling to collect a huge amount of information about daily, even hourly, consumptions. It is then easy to assess lost volumes on the network, using supplied volumes information. However, because of the multiple components of water losses, the metering and calculation inaccuracies, the occurrence of new (detectable) leaks is ...


    By IWA Publishing

  • Insertable Valve Network Provides OngoingSolution to Water Loss

    Orange Cove, CA - As the only city in Fresno County that is completely dependent on surface water, the City of Orange Cove had 40% unaccounted for water loss when Bill Little, former City Manager returned to Orange Cove to address the community’s growing water problems... “Our goal is to reduce unaccounted for water loss in Orange Cove down to 3% - 5%,” explained Little. “In a city with an old ...


    By ADS Environmental Services

  • Bayesian modelling for water loss management decisions

    Bayesian networks and their associated methods are especially suited for capturing and dealing with uncertainty. They can be successfully applied both in engineering sciences and in reliability analyses of water distribution systems. In this paper we propose an interactive Bayesian network and a decision-theoretic system which intend to monitor water loss, predict likely outcome and select ...


    By IWA Publishing

  • Singer`s specialty PRV regulates Bangkok pressure - Case Study

    Their Challenge With water loss up to 30 per cent, Metropolitan Water Authority (MWA) in Bangkok, Thailand, installed pressure reducing valves throughout the city and its suburbs. The valves controlled nighttime pressures accurately, preventing leaks and breaks. However, in some areas, high demand during the day caused the pressure to drop to 10 psi (0.68 bar) or less. Without sufficient ...

  • Comparing Leakage Performance using the Frontier Approach

    The choice of the most appropriate indicator to use to compare leakage performance between companies or zones has been the focus of much research and study. The IWA Water Loss Task Force made recommendations (Lambert, 2000) about standardising the terminology and the water balance and then went on to show the short comings of some performance measures. It introduced the concept of the unavoidable ...


    By IWA Publishing

  • Using performance indicators as a water loss management tool in developing countries

    Water utilities in developing countries are facing the challenges of substantial water losses in their water supply systems. In order to deliver water to their customers more efficiently and effectively, utilities must be able to measure and assess the performance of their water supply systems against set management objectives. However, water loss assessment is still not widely practised in ...


    By IWA Publishing

  • Introducing pressure and number of connections into water loss indicators for French drinking water supply networks

    In France, the system of performance indicators defined within the relevant regulations does not include indicators relating to pressure, or the number of connections. So, Irstea and Veolia Water decided to create a new system of water loss indicators designed for use in France and that would take into account these parameters. The study was initially carried out at District Metered Area (DMA) ...


    By IWA Publishing

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

    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, ...


    By IWA Publishing

  • Basic principles for urban water value assessment and price setting towards its full cost recovery – pinpointing the role of the water losses

    This paper attempts to set the basic methodological framework for an integrated action plan (in terms of successive steps) to be developed that will guarantee the reliable calculation of the Full Water Cost (FWC), as defined by the WFD 2000/60/EC. Towards this goal, the crucial role of the water losses occurring in a water distribution system is demonstrated. This will help an effective and ...


    By IWA Publishing

  • Tackling water losses through improved domestic water bills

    The domestic water bills that municipalities send out to consumers on a monthly basis are a key interface between local government and citizens. Being a legal instrument, as well as a communication medium, the consumers' level of understanding of their water bills and the confidence in the information provided is therefore indicative of their effectiveness. A lack of understanding of bills ...


    By IWA Publishing

  • Utilizing analytic hierarchy process (AHP) for decision making in water loss management of intermittent water supply systems

    Increasing water demands, in parallel with water scarcity, force water utilities in developing countries to follow complex operation techniques for the distribution of the available amounts of water. The reduction of water losses from water supply systems can help fill the gap between supply and demand. This strategy is characterized by the variety of options, and identification of the most ...


    By IWA Publishing

  • Genotypic variation in epidermal conductance and its associated traits among oryza sativa and o. glaberrima cultivars and their interspecific progenies

    Epidermal conductance (g.min) is a measurement of water loss through the cuticle and stomata when stomatal conductance is minimal. Two pot experiments were conducted to evaluate genotypic variation in gmin for 10 to 12 rice cultivars (Oryza spp.) grown under flooded conditions. Epidermal conductance was estimated by measuring loss of water from the excised topmost fully-expanded leaves. ...

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you