water loss Articles

  • The reduction of water losses

    Leaks in water pipes and leaking valves in urban water distribution system and pipeline networks, mainly in developing and threshold countries, are the threshold countries, are the reason for water losses of up to 50% in relation to the water quantity being produced in the water ...


    By VAG-Armaturen GmbH

  • 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

  • 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

  • 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

  • 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

  • Water Loss management will be critical to climate change adaptation

    Water loss management is one of the most important issues facing water suppliers around the world. The Sustainable Development Goals have made poverty alleviation and access to safe drinking water a political priority. Targets on providing safe drinking water as a basic human right aim to ensure everyone can access a safe water supply. Unfortunately, the reality is that many of the most ...

  • 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

  • Wasting energy through steam loss

    The European Union Directive on the Energy Performance of Buildings, which relates to all member nations of the European Union, are obliged to set limits on greenhouse gas emissions, particularly from buildings. Typically steam is used for a wide range of applications within larger establishments including, humidification, hot water, space heating and air heating.  Primary energy losses in ...

  • Application of MUSLE for the prediction of phosphorus losses

    Soil erosion in forestlands affects not only land productivity but also the water body down stream. The Universal Soil Loss Equation (USLE) has been applied broadly for the prediction of soil loss from upland fields. However, there are few reports concerning the prediction of nutrient (P) losses based on the USLE and its versions. The present study was conducted to evaluate the applicability of ...


    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

  • 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

  • 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

  • From energy balance to energy efficiency indicators including water losses

    The collection and distribution of drinking water resources generally require large quantities of energy, that vary according to factors related to the characteristics of the served area, as well as to design and management choices. Energy intensity indicators (energy per unit of volume) are insufficient to assess the weight of different factors that affect the energy consumption and appear not ...


    By IWA Publishing

  • Forest clearing, water loss, and land surface heating as development costs

    This paper documents the effects of development in Kenya and its subsequent influence on surface temperatures. The assumption is that deforestation leads to a decrease in evapotranspiration, and causes an observed temperature increase. The study was realised in the Mau Forest of Central Kenya, where extensive deforestation over the past 20 years has caused changes in climate and hydrology. The ...


    By Inderscience Publishers

  • Quadratic head loss approximations for optimisation problems in water supply networks

    This paper presents a novel analysis of the accuracy of quadratic approximations for the Hazen–Williams (HW) head loss formula, which enables the control of constraint violations in optimisation problems for water supply networks. The two smooth polynomial approximations considered here minimise the absolute and relative errors, respectively, from the original non-smooth HW head loss function ...


    By IWA Publishing

  • Assessment of real losses in potable water distribution systems: some recent developments

    ABSTRACTConsiderable progress has been made over the past 10 years in the assessment and benchmarking of real losses in potable water distribution systems. Most of the advances have been based on the burst and background estimate (BABE) methodology, which was first developed in the mid-1990s by the UK water industry and has since been widely accepted and used in many parts of the world. Since ...


    By IWA Publishing

  • Melaka Gets Tough on Non Revenue Water Loss and Claims Two Awards

    Melaka is a relatively small state on the southwest side of the Malay Peninsula with a city so rich in history and beauty that it is listed as a UNESCO World Heritage site. With a population around 850,000, the Melaka Water Company Ltd. (SAMB) manages roughly 270,000 service connections for commercial and residential customers. In 2008 the city embarked on an aggressive plan to upgrade ...


    By Singer Valve Inc.

  • Yorkshire Water Develops Environmental Profit and Loss Account Case Study

    The EP&L was created in partnership with Trucost, the global leader in natural capital valuation. By putting a monetary value on positive and negative environmental impacts, companies can better manage the challenges posed by climate change, resource scarcity and a growing population. Yorkshire Water wanted to investigate the potential of natural capital valuation to deliver insights for its ...


    By Trucost Plc

  • 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

  • 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

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