near-surface geophysical survey Articles

  • Integrated Geophysics: GPR and EMI surveys at an air force base

    PROJECT: GPR and EMI surveys at closed metallic waste disposal sites LOCATION: Hill Air Force Base Annex near Ogden, Utah PROJECT DESCRIPTION: Designed and performed a GPR survey in tandem with an EM-31 terrain conductivity survey regarding two suspected Mg/Th aeronautical debris dump sites at an Air Force base in Utah.  Survey was designed to ...


    By ECA Geophysics

  • Integrated Geophysics: Magnetic / EMI surveys at an air force base

    PROJECT: EMI and Magnetic surveys at closed waste disposal sites LOCATION: Holloman Air Force Base near Alamogordo, New Mexico PROJECT DESCRIPTION: Designed and performed total-field magnetometer surveys in tandem with EM-31 terrain conductivity (EMI) surveys of approximately 53 acres of closed landfills at an Air Force base in New Mexico.  Survey ...


    By ECA Geophysics

  • Integrated Geophysics: GPR and EMI surveys at an air force site in the Mojave desert

    PROJECT: GPR and EMI surveys at closed waste disposal sites LOCATION: Cuddeback Air-to-Ground Gunnery Range in the Mojave Desert near Ridgecrest, California PROJECT DESCRIPTION: Designed and performed a GPR survey in tandem with an EM-31 terrain conductivity survey of nine closed landfilling areas at an abandoned Air Force gunnery range located in the ...


    By ECA Geophysics

  • The Mycenaean drainage works of north Kopais, Greece: a new project incorporating surface surveys, geophysical research and excavation

    The attempt to drain the Kopais Lake was one of the most impressive and ambitious technical works of prehistoric times in Greece, inspiring myths and traditions referring to its construction and operation. The impressive remnants of the Mycenaean hydraulic works represent the most important land reclamation effort during prehistoric Greek antiquity, thus attracting the attention of the ...


    By IWA Publishing

  • Surface borehole resistivity survey case study 1

    Surface borehole method can be used to effectively maximise the value of existing boreholes. This is because surface-boreholre method can give operator more geological and geophysical information around the borehole. For example, we did a surface-borehole survey, where there was already well-known mineralisation existing between 60-80m in Figure one and 100-115m. The inversion resistivity ...

  • Electromagnetic (EMI) surveys

    EMI (EM-34) surveyDesigned and performed an EM-34 soil conductivity (soil mapping) survey of a 26-acre wood-waste landfill in Omak, Washington.  This soil mapping survey was designed to detect buried drums at a depth of 60 feet and was augmented by a total-field magnetometer survey. While employed with the Arkansas Department of Environmental Quality (ADEQ), performed approximately 40 ...


    By ECA Geophysics

  • GPR survey to locate USTs and piping at a retail facility

    PROJECT: GPR survey with confirmatory drilling + soil and water sampling / analysis LOCATION: Spokane, Washington PROJECT DESCRIPTION: Designed and performed a tight-line / saturation Ground Penetrating Radar (GPR) survey of an active retail property, to determine the presence, if any, of buried 1950s-vintage underground storage tanks (USTs). Performed ...


    By ECA Geophysics

  • GPR survey to delineate edges of USTs at a gas station

    PROJECT: GPR survey with confirmatory drilling LOCATION: Moyie Springs, Idaho PROJECT DESCRIPTION: Performed a saturation GPR survey of an active gas station, to identify / locate the edges and ends of three inactive closed-in-place USTs. Performed onsite instrument "calibration" with active UST, to establish reliable depth estimates. Recommended ...


    By ECA Geophysics

  • GPR survey to locate USTs and piping at a retail facility

    PROJECT: GPR survey of a retail facility LOCATION: Spokane, Washington PROJECT DESCRIPTION: Designed and performed a tight-line / saturation Ground Penetrating Radar (GPR) survey of an active retail property, to determine the presence, if any, of buried 1950s-vintage underground storage tanks (USTs). Performed onsite instrument "calibration" with known ...


    By ECA Geophysics

  • Combined interpretation of radar, hydraulic, and tracer data from a fractured-rock aquifer near Mirror Lake, New Hampshire, USA

    An integrated interpretation of field experimental cross-hole radar, tracer, and hydraulic data demonstrates the value of combining time-lapse geophysical monitoring with conventional hydrologic measurements for improved characterization of a fractured-rock aquifer. Time-lapse difference-attenuation radar tomography was conducted during saline tracer experiments at the US Geological Survey ...


    By Springer

  • Case Study - Pipeline Subsidence

    Looking for sinkholes Pyramid Environmental recently performed a geophysical investigation for the National Park Service at Carlsbad Caverns National Park in Carlsbad, NM. The survey used electrical resistivity mapping (ER) to look for potential underground caves or caverns near an area designated for the construction of an underground utility line. A 2D resistivity survey ...


    By Advanced Geosciences, Inc.

  • Reservoir Monitoring in Delvina, Albania Monitoring - Case Study

    Reservoir Monitoring At the end of December 2011, STREAM OIL&GAS Ltd had planned to apply the technique of hydraulic acid fracturing in the Well D-12 of the Delvina block, aiming to increase the well’s natural gas productivity rate. In this context, Seismotech Geophysical Solutions was asked to monitor and analyze the possible microseismic activity on this area, ...


    By SeismoTech Ltd

  • Underground storage tanks case study

    MacDill Air Force Base A Phase II environmental site assessment was conducted at a military base in the southeastern United States. As part of the ESA, GeoView was contracted to perform the geophysical site assessment. The purpose of the geophysical investigation was to determine the presence and location of any underground storage tanks that may be buried within the boundaries of the ...


    By GeoView, Inc.

  • Case Study - Construction Aggregate: Sand

    Geologic Mapping of Sand Unit Thickness Pyramid was contracted to perform an electrical resistivity survey across 230 acres of undeveloped land in North Carolina. The purpose of the survey was to quantify the lateral extents and approximate depth/thicknesses of sandy soils near the ground surface. The client was interested in the potential of the site to be utilized as a sand mine, and ...


    By Advanced Geosciences, Inc.

  • Seismic study at the Pacific and Atlantic locks of the panama canal case study

    Panama Canal Zone Grupo Unidos Por el Canal (GUPC) was tasked with characterizing subsurface conditions within the Third Set of Locks Project for the Panama Canal. In support of their characterization efforts, GUPC requested that seismic geophysical data be acquired at four locations within the project area.  These locations include portions of the: Miraflores ...


    By GeoView, Inc.

  • Integration & Joint Interpretation of Passive Seismic Tomography, Gravity and MT Data - Case Study

    Integration & Joint Interpretation of Passive Seismic Tomography, Gravity and MT Data The scope of this project was an integrated interpretation of the Passive Seismic Tomography, Gravity and Magnetotelluric data, acquired in the Delvina Gas field area in the context of the according geophysical surveys. Although the Delvina Gas field has a marginal production, the only ...


    By SeismoTech Ltd

  • Seismic reflection, seismic crosshole and ground penetrating radar case study

    Geophysical Investigation of the Crosstown Expressway. Tampa, FL In April, 2004 Pier 97 which supported an elevated roadway in Tampa, FL was vertically displaced (collapsed) approximately 10 feet (ft). At the time of the collapse it was not known whether the collapse was associated with geological conditions at the site, specifically karst conditions, or whether is was associated with a ...


    By GeoView, Inc.

  • Magnetic and ground probing radar measurements for soil pollution mapping in the industrial area of Val Basento (Basilicata Region, Southern Italy): a case study

    Abstract  The joint application of electromagnetic techniques for near-surface exploration is a useful tool for soil pollution monitoring and can also contribute towards describing the spatial distribution of pollutants. The results of a geophysical field survey that was carried out for characterizing the heavy metal and waste disposal soil pollution phenomena in the industrial area of Val ...


  • Mineral prospecting case study 2

    We had recently carried out a copper prospecting survey. Electrodes were placed on the surface at 5m interval, one cable was connected to electrodes on surface and another cable is put in to the borehole. After repeating the surveys at nearby borehole, we generated two resistivity distribution images. We determined that the band of low resistivity approximately 30m below surface has a high chance ...

  • Buried debris case study

    Saufley Field, Escambia County, Florida GeoView was tasked with performing a geophysical investigation at a military base in the southeastern United States. The purpose of the investigation was to locate a reported debris burial pit. The burial pit was reported to be 60 feet (ft) in length and up to 10 ft deep. Historical records indicated that the pit  contained buried drums and ...


    By GeoView, Inc.

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