complex hydrogeological system Articles

  • White paper on Willowstick technology used for mapping and modeling groundwater systems

    1.0 Introduction Willowstick Technology (the “Technology”) delineates and characterizes subsurface aqueous systems in complex hydrogeologic settings. It has consistently proven valuable in: 1) the diagnosis of seepage through earthen dams and levees; 2) characterizing groundwater infiltration into surface and subsurface mines; 3) tracking pollution plumes influenced by ...


    By Willowstick Technologies LLC

  • Trends and transformation of nutrients and pesticides in a coastal plain aquifer system, United States

    Received for publication March 19, 2009. Four local-scale sites in areas with similar corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] agriculture were studied to determine the effects of different hydrogeologic settings of the Northern Atlantic Coastal Plain (NACP) on the transport of nutrients and pesticides in groundwater. Settings ranged from predominantly well-drained soils overlying ...

  • Case study - Westbay System delivered cost effective groundwater monitoring in mountainous region

    Multilevel well network provided high-density data at a reduced cost CHALLENGE After installing a number of traditional  monitoring wells at the site, it became  clear to the project scientists that more  and better data would be necessary  to properly characterize the complex  groundwater flow system. SOLUTION ...


  • Upper Thames major resource development: Thames water

    Client: Thames Water Location: Abingdon, Oxfordshire Services: Groundwater Modelling , Environmental Impact Assessments Issues: Impact of reservoir construction on local groundwater system and wider     surface water environment Summary: ESI supported the preparation of the ...


    By ESI Consulting

  • Ranking of conceptualized groundwater models based on model information criteria

    Modelers typically test alternative conceptualizations of a groundwater system because the ‘true’ hydrogeological model of the system is unknown, and the observed data are limited. This study elaborates on how to rank different conceptualizations of a groundwater system by using selection techniques and criteria that make a balance between complexity and accuracy of models. ...


    By IWA Publishing

  • Groundwater and contaminant transport modelling

    Client: Nuclear Industry Location: Cumbria, UK Services: Radioactive waste consultancy, hydrogeological risk assessment Issues: Potential risk to groundwater, environment and human health. System conceptualisation Summary: ESI developed a FEFLOW finite element model of the groundwater system in the ...


    By ESI Consulting

  • Detailed hydraulic assessment using a high-resolution piezocone

    Department of Defense (DoD) ground water assessment and remediation projects require cost effective methods for determination of the direction and rate of ground water and contaminant flow. Monitoring wells have typically been used to estimate these parameters. However, detailed three-dimensional ground water and contaminant flow pathways cannot typically be delineated using monitoring well data. ...

  • Response of rock-fissure seepage to snowmelt in Mount Taihang slope-catchment, North China

    The complex physiographic and hydrogeological systems of mountain terrains facilitate intense rock-fissure seepages and multi-functional ecological interactions. As mountain eco-hydrological terrains are the common water sources of river basins across the globe, it is critical to build sufficient understanding into the hydrological processes in this unique ecosystem. This study analyzes ...


    By IWA Publishing

  • Supervised committee machine with artificial intelligence for prediction of fluoride concentration

    The study introduces a supervised committee machine with artificial intelligence (SCMAI) method to predict fluoride in ground water of Maku, Iran. Ground water is the main source of drinking water for the area. Management of fluoride anomaly needs better prediction of fluoride concentration. However, the complex hydrogeological characteristics cause difficulties to accurately predict fluoride ...


    By IWA Publishing

  • Detailed hydraulic assessment using a high-resolution piezocone coupled to the GeoVIS

    Department of Defense (DoD) ground water assessment and remediation projects require cost effective methods for determining the direction and rate of ground water and contaminant flow. Monitoring wells have typically been used to estimate these parameters. However, detailed three-dimensional ground water and contaminant flow pathways cannot typically be delineated using monitoring well data. ...

  • Spolchemie site remediation and NanoRem field site application

    Site Remediation The Spolchemie site was chosen as one of the NanoRem case study sites, to test two types of nanoparticles (NPs) (zerovalent iron - nZVI and iron oxide NPs) for in situ remediation of BTEX (Benzene, Toluene, Ethylbenzene, and Xylenes) contamination. Nanoremediation was seen as an opportunity to enhance the in situ biodegradation of the BTEX contaminants and to reduce the ...


    By NANO IRON s.r.o.

  • What’s the Temperature? Thermal Modeling and its Importance in Thermal Remediation

    What is a model? A beautiful person who struts down a run way, a scaled down sculpture of the Empire State Building, or a series of equations that describe some phenomenon? Did you guess all of the above? Gold star! Models come in many different shapes and sizes. In the environmental consulting and remediation industry, the word “model” often refers to a numerical model. Numerical ...


    By TerraTherm, Inc.

  • Case study - Multilevel sampling and monitoring, Maryland, USA

    Challenges Volatile Organic Compounds contaminated the groundwater posing a risk to nearby private water supply wells. The traditional approach of drilling and sampling multiple boreholes did not provide adequate data to characterize groundwater flow and contaminant migration in the complex fractured bedrock. Solution Westbay System* was installed ...


  • Storing Heat Underground

    Underground thermal energy storage (UTES) is a system that uses inter-seasonal heat storage, storing excess heat from the summer for use in winter heating, and the cooling potential from winter for cooling in summer. A cost-effective, low-energy and low-risk proven renewable technology, UTES reduces carbon emissions by up to 60% and is becoming an increasingly popular choice for residential, ...


    By Boode Waterwell Systems

  • Sustainability of Arizona’s few remaining perennial streams.

    Mother Nature made water simple. In general, water comprises a continuum in whatever phase or phases it may occur. If you take some here, you have less somewhere else. Arizona law does not readily account for this simple concept; rather it arbitrarily divides water into different classes to be regulated as if the classes were somehow distinct and separable. This creation of different classes of ...


    By Hargis + Associates Inc

  • Low-Flow (Minimal Drawdown) Ground-Water Sampling Procedures

    Untitled Document Background The Regional Superfund Ground Water Forum is a group of ground-water ...


    By Solinst Canada Ltd.

  • EPA Technology News & Trends - Tacoma “Well 12A” Superfund Site

    The U.S. EPA Region 10 office uses an adaptive site management approach that relies on high-resolution site characterization (HRSC) techniques for strategic sampling at the Well 12A project area. This approximate one-square-mile project area is one of three at the 2.5-square-mile Commencement Bay-South Tacoma Channel Superfund site in Tacoma, Washington. The vicinity of Well 12A, one of 13 wells ...


    By TRS Group, Inc.

  • Geological Survey Department - Case Study

    Client Geological Survey Department Country Cyprus Background and objective The third largest island in the Mediterranean Sea is battling the subterranean penetration of salt water and long periods of drought, which cause water shortages. Water management in jeopardy The semi-arid climate on Cyprus makes great ...


    By Eijkelkamp Soil & Water

  • The DNAPL Remediation Challenge: Is There a Case for Source Depletion?

    Untitled Document Executive Summary Introduction Releases of Dense Non-Aqueous Phase Liquids (DNAPLs) at a large number of public ...


  • Cyanide Spill at Baia Mare - Assessment Mission Report UNEP/OCHA

    Introduction On 30 January 2000, following a breach in the tailing dam of the Aurul SA Baia Mare Company, a major spill of cyanide-rich tailings waste was released into the river system near Baia Mare in north west Romania. The contaminant travelled via tributaries into the river Somes, Tisza and finally into the Danube before reaching the Black Sea. A team of international ...

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