oil-in-water event Articles

  • Geostatistical techniques for approximate location of pipe burst events in water distribution systems

    This paper focusses on the customisation and further enhancement of the recently developed data-driven methodology for the automated near real-time detection of pipe bursts and other (e.g. sensor faults) events at the district metered area (DMA) level. Assuming the availability of pressure/flow data from an increased number of sensors deployed in a DMA, the aim is to: (i) overcome the ...


    By IWA Publishing

  • An agent-based modeling framework for sociotechnical simulation of water distribution contamination events

    In the event that a contaminant is introduced to a water distribution network, a large population of consumers may risk exposure. Selecting mitigation actions to protect public health may be difficult, as contamination is a poorly predictable dynamic event. Consumers who become aware of an event may select protective actions to change their water demands from typical demand patterns, and new ...


    By IWA Publishing

  • Optimal sensor placement for event detection and source identification in water distribution networks

    This study focuses on the optimization of sensor placement with respect to the source identification and event detection. A multi-objective algorithm is used to solve the optimization problem. The numbers of possible source nodes for contamination events associated with the solutions on the Pareto fronts from the proposed method and benchmark method are calculated under the same configuration ...


    By IWA Publishing

  • Molecular techniques and data integration: investigating distribution system coliform events

    A retrospective analysis of coliform events in a drinking water distribution system was conducted. A total of 13 coliform isolates with specific geographic/sampling records were analysed using microbial source tracking (MST) to establish genetic (based on DNA) and phenotypic (based on substrate utilization) relatedness between isolates, and a data integration approach (geo-spatial and event ...


    By IWA Publishing

  • Effect of television broadcasts of global sporting events on short-term changes in the use of water from the water supply network

    The article discusses the influence of television broadcasts of global sporting events on water usage in the city of Toruń during the final match of the FIFA 2014 World Cup in Brazil. The analyses covered accurate data of water usage (recorded every 1 minute) in the city on the day of the final match. The obtained results were compared with the data for the same days of the week (Sundays) but ...


    By IWA Publishing

  • Virus contamination from operation and maintenance events in small drinking water distribution systems

    We tested the association of common events in drinking water distribution systems with contamination of household tap water with human enteric viruses. Viruses were enumerated by qPCR in the tap water of 14 municipal systems that use non-disinfected groundwater. Ultraviolet disinfection was installed at all active wellheads to reduce virus contributions from groundwater to the distribution ...


    By IWA Publishing

  • Data analytics methodology for monitoring quality sensors and events in the Barcelona drinking water network

    Water quality management is a key area to guarantee drinking water safety to users. This task is based on disinfection techniques, such as chlorination, applied to the drinking water network to prevent the growth of microorganisms present in the water. The continuous monitoring of water quality parameters is fundamental to assess the sanitary conditions of the drinking water and to detect ...


    By IWA Publishing

  • Experimental observation on factors affecting intrusion volumes during low or negative pressure events

    External water intrusion during low or negative pressure transient events in urban water supply systems may cause pollution and health problems. The volume of intrusion pollutants is one of the significant indicators that can reflect the degree of health risks when a pollution incident occurs. A pilot-scale platform was constructed in this study to simulate intrusion events, which were caused ...


    By IWA Publishing

  • Safe drinking water and waterborne outbreaks

    The present work compiles a review on drinking waterborne outbreaks, with the perspective of production and distribution of microbiologically safe water, during 2000–2014. The outbreaks are categorised in raw water contamination, treatment deficiencies and distribution network failure. The main causes for contamination were: for groundwater, intrusion of animal faeces or wastewater due to ...


    By IWA Publishing

  • Topological clustering as a tool for planning water quality monitoring in water distribution networks

    Topological clustering was explored as a tool for water supply utilities in preparation of monitoring and contamination contingency plans. A complex water distribution network model of Copenhagen, Denmark, was simplified by topological clustering into recognizable water movement patterns to: (1) identify steady clusters for a part of the network where an actual contamination has occurred; (2) ...


    By IWA Publishing

  • Water Treatment Optimization - Case Study

    Drinking water treatment in North America has stringent requirements for effluent water quality, with a great amount of attention being drawn to the presence of hazardous disinfection by-products (DBPs) persisting through water distribution systems. The operation of water treatment plants involves addition of various mixing agents to help with coagulation and settling of organics in the raw water ...


    By MANTECH Inc.

  • Water Distribution System Security Monitoring

    A water security instrument essentially needs to be able to detect potential contaminants in drinking water. Since a significant number of potential chemical contaminants are organic in nature, a water security monitoring instrument that can detect organic matter in water is perfect for this application. Real Tech has developed an instrument specifically designed for water security ...


    By Real Tech Inc.

  • Cascade vulnerability for risk analysis of water infrastructure

    One of the major tasks in urban water management is failure-free operation for at least most of the time. Accordingly, the reliability of the network systems in urban water management has a crucial role. The failure of a component in these systems impacts potable water distribution and urban drainage. Therefore, water distribution and urban drainage systems are categorized as critical ...


    By IWA Publishing

  • Water for Southern California: water resources development at the close of the century.

    INTRODUCTION In 1999, California observes the 150th year of the Gold Rush. Rather than an isolated historical event, it could be argued that the California Gold Rush never really ended, but rather that it was the first chapter in a mass migration unlike any other in history, both in scale and duration. At the founding of the Missions by Franciscan friars, Alta California was almost an ...


    By Hargis + Associates Inc

  • The Need for a Total View of Water Networks

    The water industry is not short of software offerings, and so the arguments in favour of yet another software program had better be very good indeed. In this article we examine how one very significant community of users – operations managers, engineers and planners - have largely had their specific needs overlooked; we identify the type of system needed to fulfil their requirements and the ...


    By Innovyze

  • Legislation: Future water - The govenment`s water strategy for England

    Visions, Strategies & Realisation Compared to other environmental areas such as land use, waste management, air quality and biodiversity, comprehensive strategic planning of water management in England has been dilatory. This is not to say that strategic planning has been entirely absent in water management, but that it has been undertaken in a piecemeal way, with numerous sectoral ...


  • Framework for water quality monitoring system in water distribution networks based on vulnerability and population sensitivity risks

    Delivering water in sufficient quantity and acceptable quality is the main objective of water distribution networks (WDN) and at the same time is the main challenge. Many factors affect the delivery of water through distribution networks. Some of these factors are relevant to water quality, quantity and the condition of the infrastructure itself. The deterioration of water quality in the WDN ...


    By IWA Publishing

  • Evaluation of chlorine decay models under transient conditions in a water distribution system

    Residual chlorine concentration decreases along distribution networks because of factors such as water quality, physical properties of the pipeline, and hydraulic conditions. Hydraulic conditions are primarily governed by transient events generated by valve modulation or pumping action. We investigate the impact of transient events on the rate of chlorine decay under various flow conditions. ...


    By IWA Publishing

  • Water business in China through the eyes of an entrepreneur

    ‘China has grown at an incredible pace for 30-odd years, but at the cost of the environment,’ comments Dutch entrepreneur Gijs de Bruin. The government is of course aware of this and the risk it poses to future economic growth, and it is the reason for the heavy on-going investment in environmental actions, including the water sector. ‘Water is one of the sectors in ...


    By Aquatech Global Events

  • Case Study: Wheeling Water Department, West Virginia

    Wheeling Water Department in Wheeling, West Virginia, is an independent, municipally owned water utility, serving a population of approximately 50,000 people, including all of Ohio County. Consisting of three divisions, Wheeling Water is responsible for all treatment and testing of the source, finished water and for pumping it to the customers. The utility treats approximately 7.5 million gallons ...


    By AllMax Software, Inc.

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