drainage layer Articles

  • A generic hydrological model for a green roof drainage layer

    A rainfall simulator of length 5 m and width 1 m was used to supply constant intensity and largely spatially uniform water inflow events to 100 different configurations of commercially available green roof drainage layer and protection mat. The runoff from each inflow event was collected and sampled at one-second intervals. Time-series runoff responses were subsequently produced for each of the ...


    By IWA Publishing

  • Embankment drainage with Terram drainage composites

    Project Design and construction of a new 3km runway, 45m wide with 7.5m shoulders on each side, with taxiways and turning circles, main civils contract £108m; total project cost £172m. Terram Application Terram 1B1 drainage composite was used extensively (some 300,000nr) in the construction of the embankment carrying the runway over the River Bollin ...


    By Terram - a Fiberweb business

  • Ground drainage with Filtram

    The A11 Thetford Bypass comprises approximately 7.5km of single and double carriageway. The design called for a roadside fin drain system to act as a vertical water flow interceptor in conjunction with a horizontal under channel drainage layer incorporated within the roadbase. The combined system discharges to conventional drainage outlets. Filtram 1B1 -ED was chosen as the vertical fin drain and ...

  • Cleveland hopkins int`l airport de-icing drainage layer, Cleveland, OH

    The Presto Geosystems Geoweb® Load Support System was utilized for a 1.3 million sq ft. de-icing area at the Cleveland Hopkins Airport. The system serves as a construction support platform over marginal subgrades and a highly-permeable structural drainage layer for the 30-acre de-icing site. Confinement in the interconnected cells stabilizes aggregate so it can handle the heavy loads of ...


    By Presto Geosystems

  • Heap leach drainage design

    Heap leach operations have gained popularity in the past around the world as a reasonable method for extracting metals such as gold, copper, and nickel from earth material. In such heap operations, however, the success of the leaching operation depends on the flow regime established by the sprinklers at the top of each lift and the drainage system at the bottom.Each lift represents a unique ...


    By SoilVision Systems Ltd.

  • Experience with GCLs used as a conductive layer in geomembrane leak-location surveys

    Engineers, installers, regulators, and owners are starting to rely on geomembrane leak-location surveys as part of the construction quality assurance for landfills. The various methods are described in ASTM Standard D 6747.' Standard procedures for conducting leak-location surveys of geomembranes covered with earth materials are described in ASTM Standard D 7007.2 Figure 1 shows the ...

  • 1D & 2D modelling of urban drainage systems using xpswmm and Tuflow

    Introduction: The release of a revised New South Wales (NSW) Floodplain Management Manual in 2001 established a new direction for urban flood management in NSW. This new direction was created by a redefinition of the floodplain as the area bounded by the Probable Maximum Flood (PMF) – this poses a challenge to estimate PMF flooding in highly urban areas and particularly in piped ...


    By XP Solutions

  • Assessment of the Microbial Community in a Constructed Wetland that Receives Acid Coal Mine Drainage

    Abstract  Constructed wetlands are used to treat acid drainage from surface or underground coal mines. However, little is known about the microbial communities in the receiving wetland cells. The purpose of this work was to characterize the microbial population present in a wetland that was receiving acid coal mine drainage (AMD). Samples were collected from the oxic sediment zone of a ...


  • Combination of bespoke and standard ACO surface water drainage systems

    A series of unique, high performance channel drainage systems designed and manufactured by ACO Technic, the bespoke product development division of water management specialist ACO Technologies, has been installed across Heathrow's award winning Terminal Five. As well as helping to overcome some significant challenges posed by the site's design, the systems have played a key role in creating some ...


    By ACO Group

  • Effects of nocturnal thermal circulation and boundary layer structure on pollutant dispersion in complex terrain areas: a case study

    For air quality models, it is important that the meteorological fields derived from meteorological models reflect the best characterisation of the atmosphere. Under strongly thermally–stratified conditions, the determining factors are turbulent kinetic energy and surface layer parameterisations. In this study, the 5th generation Mesoscale Model (MM5) and the Weather Research and Forecasting ...


    By Inderscience Publishers

  • Numerical simulation of drainage scenarios for lowering groundwater rise due to construction of a new barrage on the Nile River

    The government of Egypt constructed a New Naga Hammadi Barrage (NNHB) 3.6 km downstream of the Old Naga Hammadi Barrage (ONHB). Upon construction, the water level raised by about 0.5 and 4 m upstream and within the river reach between ONHB and NNHB respectively. In this paper, a two–layer groundwater model was built using MicroFEM to study the groundwater rising problem. The model was used to ...


    By Inderscience Publishers

  • Organic matter removal from saline agricultural drainage wastewater using a moving bed biofilm reactor

    We investigated the effect of salinity on the removal of organics and ammonium from agricultural drainage wastewater (ADW) using moving bed biofilm reactors (MBBRs). Under the typical salinity level of ADW (total dissolved solids (TDS) concentration up to 2.5 g·L−1), microorganisms were acclimated for 40 days on plastic carriers and a stable slime layer of attached biofilm was formed. Next, ...


    By IWA Publishing

  • GCL serves as cost-effective, time saving alternative to compacted clay liner in mine drainage settlement pond

    PROJECT: CONSOL Bailey Mine Tailings Pond LOCATION: West Finley, Pennsylvania PRODUCTS: BENTOMAT® SDN BACKGROUND: Bailey Mine, located in Southwestern Pennsylvania and owned by parent company CONSOL Energy Inc., supplies bituminous coal used in the generation of electricity. At the site, coal laden sediment is pumped to ...


    By CETCO

  • A two-stage storage routing model for green roof runoff detention

    Green roofs have been adopted in urban drainage systems to control the total quantity and volumetric flow rate of runoff. Modern green roof designs are multi-layered, their main components being vegetation, substrate and, in almost all cases, a separate drainage layer. Most current hydrological models of green roofs combine the modelling of the separate layers into a single process; these models ...


    By IWA Publishing

  • B 239 Herford bypass case study

    Secudrain WAS 7 as vertical drainage system The B 239 Herford bypass was planned and put out for tender in three sections by the Minden branch of the state highway authorities for road constructions in North-Rhine Westphalia, Germany. The contract for the third section was awarded to a joint venture between Bickhardt Bau AG and Bickhardt Bruckenund Ingenieurbau GmbH in Kirchheim, ...


    By NAUE GmbH & Co.KG

  • Drainagec composites for landfill capping with Terram 1B1

    Project: landfill site at Blankenberg, County Parchim, approximately 52,000m2 - TLRRAM I BI drainage composite. The Problem The Blankenberg landfill site has been used For decades for the disposal of residential and similar waste. As the active filling phase is over, the site is now going to be temporarily sealed. Because of the topography of the region, the area to ...

  • Laboratory Properties of a Soft Marine Clay Reinforced with Woven and Nonwoven Geotextiles

    This paper is concerned with the laboratory properties of a geotextile-reinforced compacted soft marine deposit with respect to its compaction, compressive strength, and time-dependent settlement characteristics. Two different geotextiles, namely, Polyfelt TS-500 (nonwoven) and Cardon SG PP 150 (woven) have been investigated. It was observed from the experimental study that a nonwoven geotextile ...


    By ASTM International

  • Derryclure landfill phase 2 capping - case study

    Lining Technology have successfully been awarded the contract for the Derryclure Landfill Phase 2 Capping project by Offaly County Council. The contract is for the supply and installation of a 4 layered geosynthetic capping system over the phase 2 capping area (38,000m2). Other works to be completed as part of the contract include the installation of gas extraction and drainage pipework and ...

  • Goals Soccer Centre

    5-a-side football is recognised as one of the most popular and fastest growing sports activities and Goals Soccer Centres are leading the UK’s leisure industry in the provision of “next generation” soccer facilities The Goals Soccer Centre in Portsmouth, one of 38 first class centres developed by Goals throughout the UK, has eight “third generation” 5-a-side and two ...

  • Green Roof

    A green roof, or rooftop garden, is a vegetative layer grown on a rooftop (USEPA, 2010a).  The main tasks of a green roof are retention of rainwater and increasing of evaporation. It can be distinguished between intensive and extensive green roofs. Extensive green roofs have thin layer of soil, the plants are draught tolerant and they require little maintenance. Intensive green roofs have a ...


    By IWA Publishing

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