Drainage Systems Articles

  • WaStop Access protects residents in Lewiston NY, USA - Case Study

    Location: Lewiston New York, USA Client: City of Lewiston Problem: The effect of combined sewers (combined wastewater and storm water) and an area prone to flooding from the Niagara River, a section of Upper Mountain Rd in Lewiston New York have experienced repeated flooded basements. On a visit with Jeffery Ritter of the City of Lewiston, Bob ...


    By Wapro AB

  • Case study - Airport platform

    Mexico City's international airport was built over a lake; the soil is expansive clay with water content approaching 200%. Settlement is a severe problem and several airport runways necessitated a 4m asphalt layer thickness. A recently constructed airport platform using a conventional pavement was expected to settle 3 cm at the 3 vertical loading points of the airplane over two years. In fact it ...


    By PRS Geo-Technologies

  • What Are The Benefits of Commercial Pipe Bursting?

    Repairs become more difficult when commercial aspects are involved. Aside from being disruptive for businesses and time consuming, they can also pose some safety and health hazards for the employees and customers. Trenchless technology has introduced a no-dig solution that can turn a potential sewage or drain problem into one that’s relatively seamless and quick. ...


    By TRIC Tools Inc.

  • Fort Carson Channel Repair - Case Study

    US Army Base chooses a more durable and easier to install solution than rip-rap for their channel repair project. Fort Carson, a 137,000-acre United States Army installation near Colorado Springs was established in 1942 following the events of Pearl Harbor. In 2016 the US Department of Defense noticed a huge gully forming along the roadway threatening its existence, requiring immediate ...


    By Nilex

  • Research project to remove microplastics from the water cycle

    INVENT Umwelt- und Verfahrenstechnik AG is a project partner in the BMBF project to remove microplastics from the water cycle.   Water is an indispensable element and the basis of life. The consequence of the increasing use of ...

  • Lost in calibration: why people still do not calibrate their models, and why they still should – a case study from urban drainage modelling

    From a scientific point of view, it is unquestioned that numerical models for technical systems need to be calibrated. However, in sufficiently calibrated models are still used in engineering practice. Case studies in the scientific literature that deal with urban water management are mostly large cities, while little attention is paid to the differing boundary conditions of smaller ...


    By IWA Publishing

  • Bulk Bag System Design Considerations

    Designing a new Bulk Bag Mix Tank Feed System? Here are some considerations during the design phase that will help meet expectations of plant managers and operators alike: Gravity feed of solution or metering pumps: Depending on the installation, solution/slurry from the mix tank can be gravity fed to process or if discharging into pressure, ...


    By IPM Systems, LLC

  • Ask a Cable Concrete Contractor About the Most Significant Effects of Soil Erosion and the Harm It Can Do

    Soil erosion is not unusual. In fact, it’s a pretty common occurrence around the world. When topsoil is disturbed, this layer of ground gets moved from here to there—fertile soil for farming can be lost, and wild lands can have a difficult time regenerating. Whereas soil erosion is typically thought of as a slow acting process, in reality, there is no real way of knowing just how ...

  • Study offers first-ever map showing groundwater pollution of coastal areas of United States

    The study identified 12 percent of the continental U.S. coastline — including the northern Gulf Coast from Mississippi to the Florida Panhandle, northern Atlantic Coast, and Pacific Northwest — where the once-hidden drainage systems make the ocean most susceptible to freshwater contamination from septic tanks and fertilizer runoff. In contrast, another 9 ...

  • 10 Flags in Valve Chambers that Should Make You Question What Else is Wrong

    I have reached the conclusion, as a lot of you may relate too, that I may be considered one of those “cranky old men”. It shows itself in the little things. Sentences starting with the phrase “when I was your age” or ...


    By Singer Valve Inc.

  • Flush Mounted Valve Exposed

    The “Other Guys'” answer to standing water??  The flush mounted valve. The “Other Guys'” answer to standing water is the Flush Mounted Valve.  This is a second valve that is installed adjacent to the primary valve and flush with the bottom of the insert allowing for complete drainage. As seen ...

  • Destabilization dynamics of clay and acid-free polymers of ferric and magnesium salts in AMD without pH adjustment

    The physicochemical treatment was employed to treat acid mine drainage (AMD) in the removal of turbid materials using clay only (exp A) and a combination of clay, FeCl3 and Mg(OH)2 (exp B) to form a polymer. A 5 g sample of clay (bentonite) was added to 1.2 L of AMD and treated in a jar test at 250 rpm for 2 min and reduced to 100 rpm for 10 min. A 200 mL sub-sample from the 1.2 L mother ...


    By IWA Publishing

  • Acid mine drainage treatment

    Acid mine/rock drainage is a rampant problem in the world today. The above photo depicts acid drainage at an abandoned mine in the Yukon Territory of northwest Canada. This mine shares a similar history to thousands of other mines throughout the world. It was in operation for six short years in the 1950’s, producing gold ore. Its profitability eventually failed and it was abandoned. In the ...


    By WesTech Engineering, Inc.

  • Enumeration of sulphate-reducing bacteria for assessing potential for hydrogen sulphide production in urban drainage systems

    Urban drainage structures have increasing demands which can lead to increasing hydrogen sulphide related problems forming in places where they have not previously been prevalent. This puts pressure on the methods currently used to monitor and diagnose these problems and more sophisticated methods may be needed for identifying the origin of the problems. Molecular microbiological techniques, ...


    By IWA Publishing

  • Water erosion and connectivity analysis during a year with high precipitations in a watershed of Argentina

    Soil erosion is a global concern because of its consequences for the environment and the economy of countries. In the Argentine Pampas Region, soil erosion process is a priority issue, although there is little information about sediment concentration (SC) in agricultural catchments. The study aimed at assessing the factors that have a major influence on SC and discussing the dynamics of ...


    By IWA Publishing

  • What will it take to get plastics out of the ocean?

    From drones to filters to artificial islands, innovators are working to reduce the threat thousands of tons of trash pose to marine ecosystems. A few palm trees stand strong in the salty breeze. Located on the southern tip of the Pacific island chain of Hawaii, Kamilo Beach is an isolated stretch of black volcanic shoreline in the middle of nowhere. Just a few hundred yards ...


    By Ensia

  • Dropshaft cascades in urban drainage systems

    Dropshaft cascades are typical elements of sewer systems in steep urban catchment basins. The design of a dropshaft cascade, which is generally addressed as an optimization problem, also needs to consider the subsequent effects induced on the flow by the different elements of the cascade. Experimental research has been performed at the hydraulic engineering laboratory of the University of ...


    By IWA Publishing

  • What Kenya’s biggest slum can teach us about saving cities from floods

    An innovative design firm is using data and community outreach to protect Nairobi's poorest residents from devastating storms. Try navigating the soggy, waterlogged slopes of Kenya’s largest slum, with its hundreds of thousands of ramshackle houses, and you’ll quickly realize why Kibera is named after a Nubian word meaning “jungle.” Pasted and propped along the banks of ...


    By Ensia

  • Crescent Duck Gets its Ducks in a Row by Switching to a GTI Cover

    The Customer: Crescent Duck Farm, located in Aquebogue, Long Island, NY, USA, produces only premium fresh and frozen ducks and duck products. Family-owned since 1908, Crescent Duck’s breeding and processing efforts have ensured that its products meet the standards of even the most discerning white tablecloth restaurants and Asian food trades. They also raise, slaughter, package, and ...

  • Application of horizontal-flow anaerobic immobilized biomass reactor for bioremediation of acid mine drainage

    The production of low-pH effluent with sulfate and metals is one of the biggest environmental concerns in the mining industry. The biological process for sulfate reduction has the potential to become a low-cost solution that enables the recovery of interesting compounds. The present study analyzed such a process in a horizontal-flow anaerobic immobilized biomass (HAIB) reactor, employing ...


    By IWA Publishing

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