sluices Articles

  • Distributions of phosphorus fractions in the sediments of a river–lake system: a case study in Huai River catchment area, China

    Phosphorus (P) forms, with respect to sediment characteristics, and an in-stream sluice were studied in the river–lake system, Huai River catchment area, China. The mean of total P in sediments in the mainstream of the Huai River was higher than that in the Hongze Lake. It was found that P fractions varied in the sediments throughout the river and lake. Detrital-P was the dominant P ...


    By IWA Publishing

  • Explaining inertia in restoring estuarine dynamics in the Haringvliet (The Netherlands)

    Following the 1953 flood, the Dutch delta has been shut off from the sea by a series of dams and dykes. This closing-off transformed the delta from a constantly changing estuarine environment into a freshwater body. A different way of thinking about ‘nature’ in the period 1970–1980 led to the policy proposal to transform the Haringvliet, one of the shut-off water bodies, ...


    By IWA Publishing

  • A novel technique proposed for automatic control of small hydro power plants

    A new scheme is proposed for the speed control of hydro turbines. Power can be controlled by controlling the rotary motion of the spear valve or linear motion of the sluice gate. In this paper, necessity for speed control, various function of governors, types, speed regulation of micro-hydroelectric power plants, functional block diagram of power generation and control system general models for ...


    By Inderscience Publishers

  • Real Time Control of the Sewage System in St Malo

    Saint-Malo is an extremely attractive and popular seaside resort on the north coast of Brittany in France. Covering 1,400 hectares, the local population of 50,000 increases to 120,000 in the tourist season. One of the distinguishing features of this part of the Channel coast is a very high tidal range – 14 meters from low to high, with a potential impact back through the sewer network. Combined ...


    By Innovyze

  • Treatment of Arsenic Contaminated Industrial Wastewaters

    Arsenic in industrial wastewater effluents is attracting greater regulatory attention. Depending on factors such as total maximum daily loads (TMDLs), the National Pollutant Discharge Elimination System (NPDES) discharge permit levels for arsenic may even be less than the drinking water standard of 10 µg/L. One of the industries affected by stringent arsenic discharge limits is coal-fired power ...

  • Free-surface flow simulations for discharge-based operation of hydraulic structure gates

    We combine non-hydrostatic flow simulations of the free surface with a discharge model based on elementary gate flow equations for decision support in the operation of hydraulic structure gates. A water level-based gate control used in most of today's general practice does not take into account the fact that gate operation scenarios producing similar total discharged volumes and similar ...


    By IWA Publishing

  • Hydrodynamic modelling of a regulated Mediterranean coastal lagoon, the Albufera of Valencia (Spain)

    Coastal lagoon hydrodynamics are strongly influenced by sea water exchange, especially when the connection between the lagoon and the sea is artificially regulated. These situations increase the complexity of the hydrodynamic regime, requiring the use of numerical models to understand their behaviour. Traditionally, one-dimensional models have been used, although in recent years, the development ...


    By IWA Publishing

  • Online flow measurement

    Background The undershoot weir in Hohensaaten was built in 1913. It has three openings and regulates the discharge from the Oderbruch and from the Finow canal into the Hohensaaten-Friedrichsthaler-waterway. Moreover, it protects parts of the Oderbruch against Oder floods. The weir controls the waterlevels in the Havel-Oder-waterway and in the reach of Niederfinow- Hohensaaten. ...

  • Oil-Water Separator with New Coalescing Media Handles High Load Stormwater at HydroElectric Powerplant to Yield Zero Oil Discharge

    Background Removal of oil from water before the water is discharged into a river or other body of water is an important environmental goal. In order to accomplish this, a major hydropower producer in the southern United States contracted with HydroQuip, Inc.* for the supply of a state of the art oil/water separator. The power plant had several goals, but the most important was that in ...


    By Lantec Products, Inc.

  • Water resources: quantity and flows — SOER 2010 thematic assessment

    Europe's freshwaters are affected by water scarcity, droughts and floods; by major modifications by dams, weirs and sluices, which reduce connectivity; by straightening and canalisation; and disconnection of floodplains. Different uses of water related to sectoral policies, including irrigation, bioenergy and hydropower, and inland water navigation, are affecting the quantitative status of water ...

  • River weir upgrade illustrates Rotork’s extended scope capabilities - Case Study

    Overview Rotork is well known for supplying flow control equipment for new and upgraded industrial plants and processes on a global scale. In these contracts, often involving tens or hundreds of valve actuators and associated control equipment, Rotork works with valvemakers, engineering companies and end users as one of several members of a project team, each with different areas of ...


    By Rotork

  • Reisswolf looks to secure further expansion

    German data security service provider Reisswolf is celebrating its 21st anniversary this year. Already represented in 18 countries, the Euro 50 million-plus turnover business is setting its sights on expansion into Asia, America and Australia. In addition to providing data destruction services, Reisswolf has also developed substantial expertise in the field of archiving. Founded in 1985, German ...


    By Recycling International

  • Field monitoring and numerical modeling as tools in effect-evaluation of waste heat and chlorination byproducts via cooling water discharges

    Power plants and other industrial facilities apply cooling water to remove waste heat from their condensers and heat exchangers. These industries are obliged to predict the thermal and environmental effects on the water bodies on which the discharge takes place in order minimize negative impact on aquatic organisms. The general approach of EC Water Framework Directive acquires the evaluation of ...


    By Sweco Nederland BV

  • The case for automatic weirs

    With hosepipe bans returning to parts of the country this summer, it’s easy to forget the disastrous floods of recent years – unless, of course, you were personally affected. This year’s harsh winter and modest levels of spring and summer rainfall belie a growing trend of more extreme weather events hitting the UK and a pattern of warmer winters and wetter summers. As we saw ...


    By Kijlstra LTD.

  • Case Study - ADC (Eastanglia) Ltd.

    Key facts Company ADC (Eastanglia) Ltd. Location Bonnets Lane, PE188JE Wisbech England Web www.adceastanglia.co.uk Simon Moos solution AVC/DOD - On-site dewatering Customer profile ADC (East Anglia) Ltd. is based with their ...


    By Simon Moos Maskinfabrik A/S

  • Lake Fort Smith dam & reservoir enlargement

    Client: City of Lake Fort Smith, Ark.  Completion Date: 2006  Services Provided Intake tower with microtunnels Road relocation Raw water lines Outlet works Pressure reducing station Dam embankment Principal spillway Auxiliary spillway ...


    By Burns & McDonnell

  • Proactive Dredging: A Little Now or a Lot Later

    By Isaiah Helm, Applications Engineer, SRS Crisafulli If public works departments had a list of fun things to do, dredging sediment out of holding ponds would not be on it.  It’s like cleaning the shower in your bathroom.  Whether you make ...


    By SRS Crisafulli, Inc.

  • Giant seals help protect St. Petersburg from flooding

    St Petersburg is regarded as Russia’s cultural capital. To protect its people and cultural treasures from flooding, a 25-kilometer storm flood barrier is being constructed. An essential part of this structure are 40 meter-wide, seven meter-high seals, from Trelleborg. Last january, St. Petersburg was flooded for the 302nd time in its 303-year history. The water level rose more than two meters ...


  • InfoWorks RS optimizes flood management for a complex Parisian river system

    Untitled Document Wallingford Software's InfoWorks RS software solution has been utilized to enable a French water authority to create ...


    By Innovyze

  • Case study - Successful trunk main correlations in Australia, the land of long pipes

    The Aquasscan TM Successfully locates leaks at distances over 1KM in Sydney. The Gutermann Aquascan TM (Trunk Main) correlator provided a series of high performance correlations in trials performed in Sydney, Australia.  Sydney Water provided a 1.2 KM of 600mm OD Steel trunk main for a series of tests to be performed to evaluate the performance.  The testing was administered ...


    By Gutermann AG

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