borehole Articles
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Electrotelluric Geophysical Exploration
Noted petroleum geologist Jack Elam writes about the abilities of Geophysic's patented electrotelluric tool known as the Petro-Sonde. It's ability to give the client the depth, thickness and contents of a pay zone without the need for boreholes first. By far the most advanced surveying tool on the market today the Petro-Sonde has been used in thousands of surveys all across the globe. It is ...
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Groundwater resource exploration
Resistivity method is very suitable for groundwater exploration. Two methods can be used, the surface method and crosshole method. Surface method is cost effective, though it is sometime not as accurate as the crosshole method. Geologists usually narrow down the exploration area and then operators can use geophysical methods to find groundwater. Surface method involves laying two cables on ...
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Norfolk County Council tackle groundwater contamination with low-flow - Case Study
Geotech low flow groundwater analysis equipment has enabled quick and easy access to samples at 2m intervals down a 28m screen in deep boreholes. Elizabeth Guilford of Norfolk County Council hired the low flow kit from Geotech and used it on a Norfolk CC landfill where leachate contamination of groundwater was suspected. Samples taken at 2m intervals close to elevation of the suspected ...
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Norfolk CC tackle groundwater contamination with low-flow
Quick and easy access in deep wells Geotech low flow groundwater analysis equipment has enabled quick and easy access to samples at 2m intervals down a 28m screen in deep boreholes. Elizabeth Guilford of Norfolk County Council hired the low flow kit from Geotech and used it on a Norfolk CC landfill where leachate contamination of groundwater was suspected. Samples taken at 2m intervals close to ...
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A novel approach for providing potable water in rural Sodwana Bay, northern Kwazulu-Natal, South Africa
Many people living in the Sodwana area of South Africa do not have access to potable water. Groundwater is the best source of fresh water for the rural community. Potable water in the Zululand coastal plain, Sodwana, South Africa can be enhanced by: (i) providing detailed information on the aquifer system using geophysics; (ii) providing information on groundwater quality and its efficient ...
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NMR Provides Definitive Data to Support Extensive Watershed Study in Crested Butte, CO Region
Vista Clara is pleased to play a key role in the comprehensive East River Experimental Watershed study conducted near Crested Butte, Colorado by providing advanced NMR geophysical investigation capabilities, including GMR™ non-invasive NMR surface measurement, along with both Javelin® and Dart™ portable NMR borehole logging. The study, which began in 2014, supports the collective ...
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Fractured Bedrock Remediation - Case Study
ABSTRACT BOS 200® successfully remediates petroleum groundwater impacts in fractured bedrock at a former truck stop. Based on the post-injection groundwater results from the pilot test and full-scale injection, a No Further Action letter was issued in February 2015. CHALLENGES Over a period of 20 years, site investigation activities revealed a 320 foot (ft) long dissolved hydrocarbon plume ...
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Passive Seismic Surveying
A new and cost-effective site-assessment tool for the quarrying industry Good quarry design and efficient operation depend upon a ground model that reliably defines the quality, volume and spatial distribution of resource and waste. Most ground models are based on boreholes, sometimes with additional 2D or 3D control provided by ‘traditional’ geophysical surveys such as microgravity, ...
By MoHo s.r.l.
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Geophysical and physicochemical characterization of organic waste contamination of hydrolithofacies in the coastal dumpsite of Akwa Ibom State, southern Nigeria
Geophysical and physicochemical methods were carried out to examine the effect of leachate on groundwater in a dumpsite location in Akwa Ibom State, Nigeria. This was done to ascertain the level of organic contamination in the wells located in the study area. The analysis of water samples from boreholes close to the dumpsite was done to constrain the interpretation of electrical resistivity ...
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FastTIMES article: Surface and Borehole NMR as a Characterization Tool for Managed Aquifer Recharge
Nuclear Magnetic Resonance (NMR) is a powerful technology for groundwater investigations, leveraging the same physics as medical MRI imaging to directly detect water and characterize subsurface hydrogeologic parameters. In geophysics, surface NMR methods can be used to non-invasively map groundwater aquifers and borehole logging NMR tools can be used to obtain high-resolution estimates of ...
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Scanning proposed borehole locations for Utilities case study
Environmental and engineering firms often are tasked with performing soil borings for monitor well installation as part of a Phase II Environmental Site Assessment. This task becomes more challenging when the borings are to be installed in gasoline stations, right of ways or other areas where there are numerous underground utilities that are either unmarked or not properly located. GeoView can ...
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Prospects for development of technologies of radwaste geological isolation in Russia
Based on the analysis of volumes, inventory and activity of all RW accumulated in Russia, the comparative estimation on methods of their safe final isolation has been conducted. More than 90% of all RW is low level activity wastes. For such waste, the most effective method of disposal is near the surface or in a superficial (shallow) underground facility created recently or one that is already ...
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Mapping Sand Unit Thickness for Construction Aggregate in North Carolina - Case Study
In August 2015, Pyramid Environmental was contracted to estimate the cubic yards of sandy soil valuable as a construction aggregate on the 230 acres of undeveloped land in North Carolina. Purpose The purpose of the electrical resistivity survey was to quantify the lateral extents and approximate depth of sandy soils near the ground surface. The client wanted to understand the potential of the ...
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NMR Can Measure Groundwater Directly – Even in Permafrost Environments
In permafrost landscapes, the ground remains mostly frozen throughout the year and liquid groundwater only occurs in certain locations or during anomalously warm periods. Understanding the spatial and temporal distribution of groundwater in these environments is extremely important as it can affect processes ranging from geotechnical soil stability to the release of greenhouse gases. In a ...
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KASTHEW GEOTECH DRILLING SOLUTIONS CO. UGANDA LTD (EAST AFRICA)
KASTHEW GEOTECH Solutions Co. Uganda Ltd. offers Geophysical and Hydro-geological surveys, Water well drilling, coring and Geotechnical with services (works, Consultation, project supervision and contracting) across the East African Region. KASTHEW GEOTECH WORKS / SERVICES;- 1. SITE INVESTIGATIONS (Dam sites, Bridges, Roads, Buildings, Quarries, Mines, Windmills, Towers) (Uganda- east ...
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Benefits of Magnetic Resonance (NMR) compared to Electrical Resistivity in Brackish and Saline Groundwater Investigations
Geophysical NMR measurements deliver reliable and straightforward hydrogeologic information, even in saline groundwater environments. These environments can be challenging to characterize with conventional electrical resistivity measurements, because differences in resistivity may be associated with the fluid or with the formation. Low resistivity could be correlated with a impermeable clay, or ...
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Pump/Recharge Rate Affects Saltwater Intrusion
Untitled Document Many areas of the world use groundwater as their main source of fresh water supply. With the worlds population increasing at alarming rates, the fresh water supply is being continually depleted, increasing the importance of groundwater monitoring. One of the major concerns most commonly found in coastal aquifers, is the induced flow of salt water into fresh ...
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