borehole pumping Articles

  • The application of high pressure jetting drilling in Eastern Sichuan

    Based on the problem of the low rate of penetration (ROP) of well sections above Xujiahe formation (mainly sandstone and mudstone) in Eastern Sichuan, Southwest of China, this paper discusses the feasibility of a high pressure jetting drilling scheme in this area and analyses its mechanism of increasing ROP. The paper establishes a physical model of borehole flow path at bottom hole and applied ...


    By Inderscience Publishers

  • Potable water gives new life to the sekenani primary school children

    Background The Sekenani Primary School, situated at the gate to the world renowned Maasai Mara game park in Kenya, started life as a kindergarten in 1989 and provides education to 650 boys and girls from the Sekenani township. The school has achieved exceptional results in National exams and sends many of its pupils to National, Provincial and District secondary schools. Many of ...

  • Assessing the extent of induced leakage to an urban aquifer using environmental tracers: an example from Bishkek, capital of Kyrgyzstan, Central Asia

    A groundwater residence time study of the deep fluvioglacial aquifer supplying Bishkek, capital of Kyrgyzstan, has found evidence of deep infiltration of recent recharge both in the main periurban wellfield and below the city. Commonly-employed hydrochemical markers detected urban influence in the city-centre to depths of 65–100 m, but gave no indication of the important role of induced ...


    By Springer

  • The Italian Job

    Open loop systems abstract groundwater from one or more boreholes. Heat is either extracted or added by the primary refrigerant loop, and the water is returned to a separate well or body of water. The supply and return lines need to be placed far enough apart to ensure thermal recharge of the source. The key issues for open loop systems relate to borehole yields, licensing and, most importantly, ...


    By Geoquip Water Solutions

  • H-ADCP Flow Gauge, Wessex Water case study

    Wessex Water, Design, supply and installation of low-flow environmental impacts monitoring system on the River Yeo in Somerset, 2005-2008 Wessex Water contracted HL to install a new flow-gauge to provide flow data on the environmental impact of abstraction upstream and downstream of a riverside borehole for public-supply. Due to the channel and ...


    By Hydro-Logic Services

  • Mono on the move with sintec

    Mono’s Widethroat W range pump forms an essential part of Sintec’s mobile system by pumping the thicker groutmixes more quickly and efficiently. Once the mobile system is in-situ and drilling of an exploratory hole is almost complete, a mixer combines the bentonite/cement grouts to form bentonite slurry. This is then transferred by the W Range pump to the holdingtank ready for injection into the ...

  • Brynhoffnant Primary School case study

    Location: London, NW9 6PR Job Type: School Description of Work: 150Kw Vertical Closed loop system Working with Vinci construction and Lorne Stewart, the appointed mechanical contractors, Perfect Green has played its’ part in the early handover of the new Brynhoffnant primary school. The school replaces a number of older schools and ...


    By Perfect Green Ltd. (PGL)

  • Advances in Multilevel Well Technology

    Several detailed field studies performed at research sites in the 1980’s and 1990’s suggest that most contaminant plumes exhibit large variations in concentration over small vertical distances. These variations are caused by spatial variations in the contaminant source zones and heterogeneity of the geologic materials. Conventional monitoring wells have been shown to be ineffective for accurately ...


    By Solinst Canada Ltd.

  • permanent daily outspill from riggs can dissolve just in time

    The Oil Dissolver GmbH Germany presents a practical application of environmentally friendly resolution of daily discharge of oil rigs. The light emerging from the boreholes oil can, through ...


    By Oil Dissolver GmbH

  • Technical Bulletin: Multilevel Sampling

    The topic of this CL:AIRE Technical Bulletin is multilevel sampling systems for characterising contaminated groundwater. Contaminated groundwater can present considerable problems for landowners: it can occur at significant depth, sources of the contamination are not often obvious, it can migrate from one property to another, and groundwater flow directions can be altered due to seasonal ...


    By Solinst Canada Ltd.

  • Modelling to assist risk assessment and remedial strategy development for a petrol spill

    Client: Confidential: Petroleum Retailer Location: Luton, UK Services: Groundwater modelling, contaminant transport modelling, remediation strategy development Summary: Groundwater modelling demonstrated that hydraulic containment of a contaminant plume could effectively protect a public water supply in the medium term, ...


    By ESI Consulting

  • Emergency response and clean-up of a diesel leak: manufacturing facility

    Project: Emergency response and clean-up of a diesel leak Client: Confidential manufacturing company Services: Emergency response planning, environmental assessment, regulator liaison, remediation design Summary: Through rapid site characterisation and expert decision making ESI minimised the environmental damage ...


    By ESI Consulting

  • Soils Characteristics of The Bassendean and Spearwood Sands of the Gnangara Mound (Western Australia) and their Controls On Recharge, Water Level Patterns and Solutes of The Superficial Aquifer

    The flow pathways of water in the soils of the Gnangara Mound are highly irregular and depend upon the moisture content, the repellency and preferential wettability potential of the soils. The occurrence of preferential flow is more evident in dry soils. As the soil wets during the rainy season, the water repellence and differential wettability decreases, the fingering and the preferential flow ...


    By Springer

  • Leachate Monitoring Alarm System

    A Major Waste-Disposal Operator, Sept 2008 - ongoing Leachate Monitoring at Landfill Site near Reading Design and installation of a GSM-based telemetry system for monitoring leachate level and pumping rates at 5 no. boreholes. An ATEX certified intrinsically-safe depth pressure transmitter was selected due to the presence of explosive gases at the site. A ...

  • Soils Characteristics of The Bassendean and Spearwood Sands of the Gnangara Mound (Western Australia) and their Controls On Recharge, Water Level Patterns and Solutes of The Superficial Aquifer

    The flow pathways of water in the soils of the Gnangara Mound are highly irregular and depend upon the moisture content, the repellency and preferential wettability potential of the soils. The occurrence of preferential flow is more evident in dry soils. As the soil wets during the rainy season, the water repellence and differential wettability decreases, the fingering and the preferential flow ...


    By Springer

  • Mono provides safe drinking water to the sesemi museum

    In 1831 the Danish Government purchased a plantation in the Akwapim range north of Accra, Ghana. The plantation was named Frederiksgave in honour of the Danish King Frederik VI. In 1850 the site was abandoned and the local people settled in the village of Djabing, around 500 m down the hill. Until 2006, the closest safe drinking water source was a single hand pump -1.6 km further down the hill. ...

  • H-ADCP Flow Gauge Installation

    Wessex Water contracted HL to install a new flow-gauge to provide flow data on the environmental impact of abstraction upstream and downstream of a riverside borehole for public-supply. Due to the channel and hydraulic conditions at the site on the River Yeo in Somerset, HL selected a horizontal ADCP Channelmaster device from Teledyne RDi for providing accurate velocity profiles at one elevation ...

  • Modelling of an open loop ground source energy design

    Client: Max Fordham Consulting Engineers Location: London Services: Ground Source Energy Modelling Summary: An open loop ground source heating/cooling scheme is being developed for the redevelopment of the Tate Modern, located close to the River Thames.  ESI Ltd was instructeded by Max Fordham to construct a FEFLOW ...


    By ESI Consulting

  • St. John’s college, Oxford - case study

    St John’s College, Oxford, will reap substantial financial and environmental benefits from sustainable low-cost technology, supplied by the company ENER-G— heat pump solutions provider. The 500-student college – established in 1555 – is among educational institutions across the country that are taking advantage of low cost, renewable ground source energy for heating, ...


    By ENER-G

  • Extraction well design for DNAPL recovery.

    The potential for downward migration of dense nonaqueous phase liquid (DNAPL) into deeper portions of a saturated hydrogeologic unit has important implications for successful groundwater remediation. Little information has been published regarding the design of extraction wells that allow DNAPL recovery without simultaneously creating a conduit for cross contamination by vertical migration ...


    By Hargis + Associates Inc

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