oil-in-water event Articles

  • Porirua New Zealand – WaStop® DN225 - Case Study

    Porirua City located 20 km north of Wellington has over 70 storm water outlets into the harbour. A number of these outlets are very flat on their approach to the harbour which generally means they are severely influenced by high tides. The problem with these outlets is that if a rain fall event coincides with a high tide, the ability of the storm water network to discharge is severely restricted. ...


    By Wapro AB

  • How To Handle Chemical Spills & Cleanups

    FAST-ACT is designed for liquid and vapor chemical releases, but the chemicals it attacks does not need to be limited to what we traditionally think of as a chemical spill. Toxic and noxious chemicals can come from a variety of sources such as waste water, decomposition, household chemicals, and animals. Since FAST-ACT can be applied to liquid spill or vapor release enabling Emergency Responders ...


    By Fast-ACT

  • Oil Water Separator Maintenance

    Oil water separators (OWS) can be co$tly to maintain, $20,000 or more on average per cleaning and if not properly managed, can be very expensive conduits of pollution. Have you taken steps to minimize the effects and consequences on your operating co$t? When was your facility’s last OWS maintenance ...

  • Water shortages and extreme events: a call for research

    Water shortages as a result of extreme weather events, such as flooding and severe cold, have the potential to affect significant numbers of people. Therefore, the need to build robust, coordinated plans based on scientific evidence is crucial. The literature review outlined in this short communication was conducted as part of a joint Drinking Water Inspectorate and Health Protection Agency (now ...


    By IWA Publishing

  • Reducing the sensitivity of the water quality index to episodic events

    We demonstrated a general relationship between water quality index (WQI) values and indices of benthic community composition for a set of 32 streams from British Columbia and Ontario. Streams that produced lower WQI values tended to have benthic communities characteristic of degraded water quality. Streams, in contrast, that produced higher WQI scores tended to have a fauna characteristic of high ...


    By IWA Publishing

  • Catchment process affecting drinking water quality, including the significance of rainfall events, using factor analysis and event mean concentrations

    To ensure the protection of drinking water an understanding of the catchment processes which can affect water quality is important as it enables targeted catchment management actions to be implemented. In this study factor analysis (FA) and comparing event mean concentrations (EMCs) with baseline values were techniques used to asses the relationships between water quality parameters and linking ...


    By IWA Publishing

  • Events organisers committed to green - case study

    Stillwater Sport and Entertainment approached NCC in 2009 to assist with writing up an Environemental Management Plan for the ProNutro African Xtrail. Stillwater Sport and Entertainment, a leader in the event management and brand activation industry, strives for bigger, better green events with the endorsement and assistance of NCC Environmental Services. Stillwater Sport and Entertainment ...

  • An event-based hydrologic simulation model for bioretention systems

    Bioretention systems are designed to treat stormwater and provide attenuated drainage between storms. Bioretention has shown great potential at reducing the volume and improving the quality of stormwater. This study introduces the bioretention hydrologic model (BHM), a one-dimensional model that simulates the hydrologic response of a bioretention system over the duration of a storm event. BHM ...


    By IWA Publishing

  • Large Precipitation Events are Critical in Replenishing Groundwater Resources

    Large precipitation events that occur about every 10 years are a critical source of recharge for replenishing groundwater resources, according to a new study by the U.S. Geological Survey and the Bureau of Reclamation. Groundwater is a vital source of water in the western United States, and will be increasingly ...

  • Integrated actions in the management of critical hydrologic events

    Owing to the increase in urban populations, there has also been an increased incidence of critical events, especially those related to floods and landslides. Since the implementation of the National Civil Defense System in Brazil, a focus on disaster management is no longer the answer when assisting those affected; instead, the answer has become managing disaster risk, in addition to the ...


    By IWA Publishing

  • Gully and overland modeling during extreme events

    Consultants JBA have been involved in modeling gully and overland flows during extreme events as part of the Interreg IIIB NWE (North West Europe) ’urban water’ project, which is being undertaken by Renfrewshire Council in Scotland. Research for this project was commissioned following flooding in 1994 and 1999. The project takes a strategic look at urban flood risk management on a large scale, ...


    By Innovyze

  • 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

  • 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

  • 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

  • Corporate restructuring of the global energy industry: an overview of events and issues

    Before 1980, outside of the world's few major integrated oil companies, only a handful of energy companies could be considered multinational. In 1999, in addition to the scores of petroleum companies that can be classified as multinational, the scope of many electricity companies and natural gas transmission companies has become increasingly global. Through mergers, acquisitions, joint ventures, ...


    By Inderscience Publishers

  • Scalewatcher removes limescale at Mathews Manor wedding and conference events venue

    Mathews Manor, a unique wedding and conference events venue in Springville, Alabama has found the solution to hard water limescale by installing the award winning Scalewatcher computerized, electronic water conditioner from Scalewatcher North America. Since installing Scalewatcher, the venue no longer has limescale residue in its dish rooms and it is using 50% less chemicals in its swimming ...

  • Discrete event simulation of the post-earthquake restoration process for electric power systems

    This paper describes a discrete event simulation model of the post-earthquake restoration process for electric power systems. The model explicitly represents the real-life restoration process, enabling development of geographically disaggregated, quantitative restoration curves with uncertainty bounds, a dynamic map showing the spatial distribution of outages changing over time, and information ...


    By Inderscience Publishers

  • Methodologies to study the surface hydraulic behaviour of urban catchments during storm events

    A good knowledge of the hydraulic behaviour of an urban catchment and its surface drainage system is an essential requirement to guarantee traffic and pedestrian safety. In many cases, inlets have been situated according to spatial density criteria. Indeed a more rational location of inlets on urban catchments must be defined according to an accurate analysis of the relationship between street ...


    By IWA Publishing

  • Trend analysis of extreme runoff events in major river basins of Peninsular Malaysia

    This study performed trend analysis of extreme runoff events (high flow and seven–day low flow) of four major river basins located in Peninsular Malaysia in Southeast Asia. Trend analysis using Spearman's rank test and standard normal homogeneity test using 25 years (1982–2006) of runoff data found no statistically significant trend in extreme events of Kelantan and Pahang basins. ...


    By Inderscience Publishers

  • Origin and possible effects of episodic nutrient deposition events over the Baltic Sea

    HELCOM has defined eutrophication as the greatest threat to the Baltic Sea environment. The focus of the paper is the identification of the possible geographical areas from where the airborne nitrogen deposited to the Baltic Sea sub–basins during main episodic events is emitted. While the nitrogen compounds are long–lived, one goal was to check if those sources are located on the Baltic Sea ...


    By Inderscience Publishers

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