hydrogeology data Articles
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ATES: a geo-informatics decision aid tool for the integration of groundwater into land planning
Groundwater is the primary source of drinking water for small municipalities and individuals. However, groundwater can be polluted by almost any land use. Consequently, many governments have acquired groundwater information in the aim of protecting the resource. Nevertheless, the resulting data are often ill-fitted to planning needs. In a previous study, a method was developed to help planners ...
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Using Geospatial Models and 3-D Visualization to Advance Decisionmaking and Communication of Remedial Solutions to Environmental Problems
ABSTRACT Integrating and presenting technical information so that complex site conditions are readily understandable is a critical factor in successful negotiations with regulatory agencies and in the courtroom. During remedial investigations, a significant amount of data of varying quality and formats is collected and compiled in a multitude of database structures. The development of ...
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Unique applications of MMR to track preferential groundwater flow paths in dams, mines, environmental sites, and leach fields
Groundwater systems have been notoriously di!cult to map with high degrees of accuracy. As a result, not only have traditional geophysical methods proven inaccurate for groundwater characterization work, but they are often costly in terms of time, money, and environmental trauma. "is paper describes a unique application of magnetometric resistivity or MMR (Edwards and Nabighian, 1991) for ...
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Project - Southeast Collector Sewer Environmental Assessments
Client: Tom Guoth, GHD Ltd. (formerly Conestoga-Rovers & Associates) Ultimate Client: Regional Municipality of York Key Personnel: D. Kassenaar, E.J. Wexler, J. Ford, M. Takeda Earthfx developed a 3-dimensional groundwater flow model to analyze the impacts of construction dewatering for the Southeast Collector (SEC) Trunk Sewer on groundwater and stream baseflow. The work was done in support ...
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GLM and joint GLM techniques in hydrogeology: an illustration
In regression models with positive observations, estimation is often based on either the log–normal or the gamma model. Generalised linear models and joint generalised linear models are appropriate for analysing positive data with constant and non–constant variance, respectively. This article focuses on the use of these two techniques in hydrogeology. As an illustration, groundwater quality ...
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A refined groundwater flow model of the shallow aquifer in Tianjin Municipality, China
The assembly of a groundwater flow model for the shallow aquifer in Tianjin Municipality is outlined in this paper. Tianjin Municipality was selected because of its complicated hydrogeological conditions and rich data, which could be used to test a refined groundwater flow model for the shallow aquifer. When a shallow groundwater flow model is being assembled its recharge and discharge ...
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Natural Attenuation
Introduction: Natural subsurface processes such as dilution, volatilization, biodegradation, adsorption, and chemical reactions with subsurface materials are allowed to reduce contaminant concentrations to acceptable levels. Natural attenuation is not a 'technology' per se, and there is significant debate among technical experts about its use at hazardous waste sites. Consideration of this ...
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Integrated local water supply plan
Client: City of Wichita, Kan. Completion Date: June 2001 Services Provided Water supply planning Evaluation of alternatives Cost estimating Economic comparison Environmental studies (NEPA) Program management Hydrogeologic engineering Water quality monitoring Operations assistance/monitoring Design criteria development Treatment pilot testing Water source optimization ...
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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, ...
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Natural Attenuation in Soils
Introduction Surface and subsurface soils have different characteristics in natural attenuation. Mobile contaminants in subsurface soils diffuse into soil vapor and aqueous phase and thus are relatively easily subject to natural subsurface processes that can attenuate these contaminants. Most high-molecular-weight (persistent) organic and many inorganic contaminants will be immobilized in the ...
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Laver Rock Mechanics Pre-Feasibility Study - Case Study
Project Description Boliden is investigating the Laver low-grade copper deposit for potential future mining. The old Laver deposit was discovered in the 1930s, and was operated between 1938 and 1946. Mining was primarily conducted as small-scale underground mining, but a small open pit was also in operation at that time. The currently investigated deposit is of larger scale and with lower ...
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Airborne Geophysical Solutions for Geotechnical Challenges
SUMMARY Assessing geological risk is a significant part of infrastructure planning and managing project cost overruns and delays are persistent challenges for engineers and project managers. Risks can be difficult to control given the high cost of detailed ground investigation programs using traditional approaches (i.e. geotechnical drillings). Airborne electromagnetic surveys (AEM) are ...
By SkyTEM ApS
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Project - WHPA Vulnerability Analysis for the Region of Peel Wellfields, Ontario
Client: Region of Peel Infrastructure Planning, Engineering and Construction Group A. Korniluk, M.Sc., P.Geo. Project Manager Hydrogeologist 10 Peel Centre Drive, Brampton, ON L6T 4B9 Project Description: Earthfx was hired by the Region of Peel to develop wellhead protection areas and contaminant vulnerability assessments for the Caledon East and Palgrave communities. Project work began with the ...
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Comparison of monitoring programmes of ultimate disposal facilities for radioactive waste and carbon dioxide
Reliable and cost–effective monitoring is an important part of making geological repositories safe, effective, and acceptable for radioactive waste disposal and carbon dioxide (CO2) storage. The major objectives of monitoring should include the evolution of disposal systems compared to the baseline data of the undisturbed site, as well as the validation of the assumptions and results of the ...
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DNAPL Characterization Methods and Approaches, Part 1: Performance Comparisons
Contamination from the use of chlorinated solvents, often classified as dense nonaqueous phase liquids (DNAPLs) when in an undissolved state, represents an environmental challenge with global implications. Mass-transfer limitations due to rate-limited dissolution can lead to long-term aquifer persistence for even small volumetric fractions. The identification of DNAPL source zones located beneath ...
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Hydrogeological assessment of pools in a Local Nature Reserve - Case Study
Location: Staffordshire, UK Sector: Wetlands Client: Local Nature Reserve voluntary A voluntary group working in unison with Stoke City Council, wanted to know what was causing the drying up of one of a series of historic pools in their Local Nature Reserve and if it could be remedied to ensure that the pool remained all year round. Groundwater Solutions advised the voluntary group that a ...
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Environmental isotopic and hydrochemical characteristics of groundwater from the Sandspruit Catchment, Berg River Basin, South Africa
The Sandspruit catchment (a tributary of the Berg River) represents a drainage system, whereby saline groundwater with total dissolved solids (TDS) up to 10,870 mg/l, and electrical conductivity (EC) up to 2,140 mS/m has been documented. The catchment belongs to the winter rainfall region with precipitation seldom exceeding 400 mm/yr, as such, groundwater recharge occurs predominantly from May ...
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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 groundwater ...
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Example of water level data logger use - case study
Geo Kamp Limited is pleased to present a typical hydrogeologic project using Heron Water Level Data Loggers (referred to as the dipperLog). The accompanying hydrographs represent the data collected for a Test Well located near Lake Simcoe (north of Toronto) in 2010. It was difficult to coordinate the schedule of the water well contractor due to inclement weather (bitterly cold) and the project ...
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Low-Flow (Minimal Drawdown) Ground-Water Sampling Procedures
Untitled Document Background The Regional Superfund Ground Water Forum is a group of ground-water scientists, representing EPA's Regional Superfund Offices, organized to exchange information related to ground-water remediation at Superfund sites. One of the major concerns of the Forum is the sampling of ground water to support site assessment and remedial performance ...
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