near-surface geophysical survey method Articles

  • 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

  • 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

  • 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 ...

  • Potential-Field Methods

    Magnetic Surveys Designed and performed a total-field magnetometer survey of a 26-acre wood-waste landfill in Omak, Washington. This magnetic survey was designed to detect buried metallic debris to a depth of 12 feet and was augmented by an EM-34 soil conductivity (soil mapping) survey. Total Field Magnetic Survey - Omak, WashingtonDesigned and performed (utilizing a ...


    By ECA Geophysics

  • 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.

  • 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.

  • 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.

  • Non-intrusive site investigation (UXO, CWM concerns)

    BEACON personnel used global positioning system (GPS) equipment to map out site locations. The soil-gas data clearly identified source areas of Trichloroethene (TCE) as well as other compounds of concern. The results showed the location of chlorinated contamination, which correlated well with data from a geophysical survey. While the flux chambers were in the field, more than nine inches of rain ...

  • Mapping sediment thickness case study

    Polk County, Florida Bathymetric and sub-bottom surveys were conducted within a clay settling pond at a Phosphate mine in Central Florida. Prior to the geophysical survey, a depression or slump had formed along the northern dam of the pond. The purpose of the study was to map various sediment layers within the pond to help determine if the depressions or slumps were related to sinkhole ...


    By GeoView, Inc.

  • Geological characterization case study

    Oil Storage Terminal Grand Bahama Island, Bahamas GeoView, Inc. performed a geophysical investigation across a 65-acre area where large bulk oil storage tanks were planned for construction. The purpose of the investigation was to evaluate the condition of the underlying limestone, which from previous work was known to be suspect in certain areas. Of primary ...


    By GeoView, Inc.

  • Seismic refraction and MASW case study

    Proposed Gatun Bridge, Colon, Panama The Autoridad del Canal de Panama (ACP) conducted a geotechnical investigation along the footprint of a proposed bridge crossing of the Panama Canal, north of the Gatun Lock. As part of the geotechnical study, GeoView, Spotlight Geophysics and ATI Panamericana were tasked to provide seismic P-wave and S-wave velocity structure of the subsurface. The ...


    By GeoView, Inc.

  • Pre-Colombian artifacts case study

    Cordillera de Mérida mountain range, Northeastern Colombia A pipeline is planned to transport oil from the Cordillera de Mérida mountain range of northeastern Colombia west towards the Pacific Ocean. An archeological investigation is being conducted by others along the proposed pipeline route to determine potential areas of historical significance. As part of ...


    By GeoView, Inc.

  • Case Study - The Oluz Mound Archaeological Site Investigation

    Amasya, Turkey The Oluz Mound is a very important ancient Turkish settlement with a history stretching back 4,500 years BC. Objective To help an on going arcaeological excavations and to show possible structural extensions or new remains on the side by using the Geophysical Electrical Resistivity Tomography (ERT) imaging method. ...


    By Advanced Geosciences, Inc.

  • Remediation of DNT drum disposal area.

    In 1991, an abandoned drum disposal area was discovered in a small ravine known as the Wash 3 tributary at the Apache Powder Superfund Site near Benson, Arizona. The 110-gallon steel drums were found to have been used to store 2,4- and 2,6-dinitrotoluene (DNT) that was purchased for experimental formulation of a composite explosive for the mining industry in the 1955 to early 1960's timeframe. ...


    By Hargis + Associates Inc

  • Groundwater exploration

    This is a collection of various cases where the 2D resistivity imaging method pioneered by Advanced Geosciences Inc have been successfully ...


    By Advanced Geosciences, Inc.

  • 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 ...


    By GeoView, Inc.

  • Identification of Archeological Remnants

    Czorsztyn Castle, Poland 2D Electrical Imaging Objective Study area was within the ruins of the 14th century Czorsztyn Castle, located in the boundaries of Pieniny National Park (southern Poland). The main goal of this research was to check if one of the stone wall residues continues under the ground surface. Additionally, an attempt was ...


    By Advanced Geosciences, Inc.

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