Water Flow Monitoring Articles

  • Open Channel Flow Monitors retired after 16 years continuous service - Case Study

    Long Sault WWTP Influent Flow Monitors Greyline Open Channel Flow Monitors were installed at the Wastewater Treatment Plant in Long Sault, Ontario when the SBR plant was originally commissioned in 1995. But after 16 years of continuous service, components for the old models became obsolete. Plant operators Caneau Water and Sewage Inc. decided to replace the instruments and new Greyline OCF ...


    By Greyline Instruments Inc.

  • Thurston County comments on Greyline Area-Velocity Flowmeters - Case Study

    We have been using Greyline products at Thurston County, Washington for approximately seven years. We use both the Stingray portable flow meters and the permanent Area Velocity Flow Meter (AVFM II) in multiple stormwater applications. We have used these meters to measure stormwater flows to help our design engineers develop flow capacity for stormwater projects. We have deployed the Stingrays at ...


    By Greyline Instruments Inc.

  • Area-Velocity Flowmeter Installations in Denmark - Case Study

    Area-Velocity Flow Meters are designed to monitor flow rates in partially filled pipes and open channels without flumes or weirs. A sealed ultrasonic sensor is mounted on the bottom of the pipe or channel and connected to electronics through a watertight cable. The sensor measures both level and velocity and when calibrated with the pipe diameter or channel dimensions, the Greyline AVFM ...


    By Greyline Instruments Inc.

  • Irrigation Water Flow Measurement with Greyline AVFM Area-Velocity Flowmeter - Case Study

    The United Irrigation District (UID) in Southern Alberta, Canada serves 34,400 acres of rural land through a series of canals, channels and pipelines running 236 km throughout the region. Water is a valuable resource in the warm, arid regions of the province and agriculture uses 60-65% of the fresh water consumed. So water use is closely regulated and monitored. ...


    By Greyline Instruments Inc.

  • Organic matter capture by a high-rate inoculum-chemostat and MBBR system

    The main objective of this study was to develop an innovative process to maximize the bio-transformation of colloidal and soluble biodegradable matter (CSB) into particulate matter (XB) for energy recovery via methane production. Two configurations were studied: (1) high-rate moving bed bioreactor (HR-MBBR) and (2) inoculum-chemostat (IC) system consisting of a very HR-MBBR inoculating a ...


    By IWA Publishing

  • The importance of groundwater monitoring

    Groundwater monitoring is an essential element in any environmental information system. Based upon validated groundwater monitoring data, information is derived on which decisions can be made. Constant monitoring provides the necessary data input for your smart environment and is basically the basis of the decision making process concerning spatial planning and climate change adaptation. As in ...


    By Eijkelkamp Soil & Water

  • Building Box Culverts with Articulated Cable Concrete Block Systems

    When you need to manage the flow of water in an area with streams, heavy rainfall or otherwise consistently wet conditions, the box culvert stands the test of time. Box culverts have been around for many years for a good reason: they can be excellent tools for directing and controlling water so it doesn’t cause erosion and interfere with roads, trails or other manmade structures that need ...

  • Determination of Flow Rates in part-filled Applications using the Radar Method

    Introduction The radar measurement method plays an increasingly important role in the water and wastewater field. This is particularly reflected by the "Metering outside of the medium" trend. Flow measurement using radar which enables contactless measurements thus becomes a major focal point. It features a wide range of applications and hence is useful as permanent measurement system for ...


    By NIVUS GmbH

  • TurbEx® COOLING TOWER - Case Study

    This article is about the case study of the TurbeEx® Cooling Tower in operation at a Huhtamaki U.S. pulp & paper facility. Commissioned in late Spring 2016 this TurbEx® COOLING TOWER cools process water at a Huhtamaki U.S. pulp & paper facility using TurboScrubber® fluidized packing to ensure continuous non-clogging operation even with sticky pulp & solids ...

  • Patoka Lake Plant upgrade requires new control valves

    Patoka Lake Regional Water & Sewer District (PLRWSD) serves 11 counties in southern Indiana with a population of around 130,000. The distribution of water travels through approximately 850 miles of pipe ranging in size from sizes 3 to 30 inches and includes numerous elevated towers or ...


    By Singer Valve Inc.

  • 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

  • Clean water is a basic human right, and we can and should make it affordable to everyone

    Ask someone in Flint, Michigan, or São Paolo, Brazil — the list of cities rocked by water disasters seems to grow each day — how much safe water is worth. Worried about contamination and drought, it might be a pretty penny. But the ability of people to actually pay for the full cost of water — from ...


    By Ensia

  • Gaussian process regression for monitoring and fault detection of wastewater treatment processes

    Monitoring and fault detection methods are increasingly important to achieve a robust and resource efficient operation of wastewater treatment plants (WWTPs). The purpose of this paper was to evaluate a promising machine learning method, Gaussian process regression (GPR), for WWTP monitoring applications. We evaluated GPR at two WWTP monitoring problems: estimate missing data in a flow rate ...


    By IWA Publishing

  • World Water Day 2017 - Wastewater

    On Wednesday 22nd March, Aquaread will be joining many other charities, organisations, businesses and individuals in celebrating World Water Day – an annual event raising awareness and support for water conditions throughout the world, with the aim of tackling the water ...


    By Aquaread Limited

  • GoRoSoBo: an overall control diagram to improve the efficiency of water transport systems in real time

    Agriculture plays an important part in the food chain and water resources for agriculture are essential. A problem is that the water transport systems present low efficiencies in practice. Crop yields must be optimized, and the goal of an operational water manager is to deliver water to irrigation sites accurately and efficiently. In order to fulfill this objective, we propose a centralized ...


    By IWA Publishing

  • Aeration System Upgrade Increases Flow Capacity and Reclaimed Water Availability

    Read the full Case Study: Replacing Brush Rotors with Aire-O2 Tritons® Increases Flow Capacity and Reclaimed Water Availability Overview: In 2012, ...

  • Accurate Flow Monitoring for Billing Applications - Passaic Valley Sewerage Commissioners, Newark, NJ - Case Study

    The accQmin velocity profiling flow meter from Teledyne Isco, Inc. is key to accurate measurement of flow for billing purposes where primary devices such as flumes can be overwhelmed at times of increased flow. Newark, NJ The Passaic Valley Sewerage Commission (PVSC) operates one of the country’s largest treatment plants for the wastewaters of northern New Jersey, working to ...


    By Teledyne Isco

  • Seasonal variation of microbial community for the treatment of tail water in constructed wetland

    Effects of seasons and hydraulic loading rates (HLR) on the treatment performance and the response of the microbial community of vertical flow constructed wetland treating tail water were investigated. The seasonal treatment performance was evaluated at four HLR of 125, 250, 375 and 500 mm/d, respectively. The microbial community was detected by MiSeq Illumina platform at HLR 125 and 375 mm/d. ...


    By IWA Publishing

  • Liquid-gas mass transfer at drop structures

    Over the last decades, considerable progress has been made in the understanding of the sulfur cycle in sewer systems. In spite of a wealth of experimental and field studies that have addressed the release of hydrogen sulfide from free surface flows in gravity sewers and the corresponding air-water mass transfer, little is known about hydrogen sulfide emission under highly turbulent conditions ...


    By IWA Publishing

  • Monitoring once through cooling water - Case study

    The Situation Power plants and paper mills use service water loops and mill water loops respectively for the cooling of lubricating, hydraulic, turbine and transformer oil.  These cooling systems feature large, recirculating volumes of water which are treated with biocides, dispersants, and corrosion inhibitors. By comparison, refineries often ...

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