Geophysics Articles

  • Keynote presenter previews NGWA Conference on Hydrogeophysics and Deep Groundwater

    Andrea Croskrey, PG, of the Texas Water Development Board will give the keynote presentation at the NGWA Conference on Hydrogeophysics and Deep Groundwater, March 20-21 in Denver, Colorado. Focusing on the use of geophysics—from remote sensing to borehole applications—for groundwater studies, the conference also ...

  • Methods used to carry out six roadway investigations of sinkholes

    Abstract Karst conditions are a prevalent problem impacting many roads, bridges and highways of the United States. Six case-histories present an overview of investigations made to determine the presence of karst (sinkholes and cavities) and their possible impact on existing or new construction. These six case-histories represent projects which range from reconnaissance investigations to ...


    By Geonics Limited

  • Geophysical applications to solid waste analysis

    Abstract: Case studies of regional landfills show that electromagnetic geophysical methods can accurately and inexpensively define boundaries and thickness of waste. Degradation of putrescible solid waste generates conductive leachate that can be imaged with a frequency-domain terrain conductivity meter. Terrain conductivity measurements can be modified through a simple algorithm based upon ...


    By Geonics Limited

  • One-step approach for the synthesis of CoFe2O4@rGO core-shell nanocomposites as efficient adsorbent for removal of organic pollutants

    CoFe2O4-reduced graphene oxide nanocomposites (CFG) have been successfully synthesized via one-step solvothermal method. The prepared CFG are characterized by X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy, field emission scanning electron microscopy (FESEM), vibrating sample magnetometer and so on. The FESEM results show that CFG have uniform core-shell ...


    By IWA Publishing

  • USGS, NASA Study Finds Widespread Coastal Land Losses from Gulf Oil Spill

    A new USGS-NASA study found widespread shoreline loss along heavily oiled areas of Louisiana's coast after the 2010 BP Deepwater Horizon oil spill and compared the erosion from the spill with coastal changes Hurricane Isaac caused in 2012. A pattern of dramatic, widespread shoreline loss along Louisiana’s coast caused by the 2010 BP Deepwater Horizon oil spill has been ...

  • Ferrography Made Easy With The FerroCheck 2000

    The measurement and trending of abnormal ferrous wear debris in machinery lubrication oils is arguably the most significant indicator of machinery health and a key predictor of catastrophic machinery failure. There are several methods available to measure the ferrous content of lubrication oil. ...


    By Spectro Scientific

  • Seismic refraction for weather zone assessment in vibroseismic processing

    Refraction seismic measurements for the determination of the seismic velocities in the shallow subsurface have been performed close to Valence (F) for our partner Partner Gallego Technic Geophysics. 44 profiles with a length of 240m have been acquired in August 2016. Seismic velocities of the shallow geological layers and the bedrock could be determined to a depth of up to 25m. Results from ...


    By Geo2X

  • UncerTZ Consortium - Time to Depth Conversion Evolved

    Near the end of 2015 Geovariances committed itself into building a new, sophisticated tool for Time to Depth conversion in Reservoir Characterization. The challenges petitioned by the consortium partners were not easy. It included features such as: more choices in conversion (and less of a “black box”), uncertainty characterization, inclusion of faults in the conversion procedure, ...


    By Geovariances

  • Case Study - 28 MW Dual-Flash Power Plant

    Brady Hot Springs, Nevada, USA – 1992 GDA was a partial owner in this successful project and was responsible for exploration and development of the resource. As Manager of Wellfield Development, GDA recommended the comprehensive wellfield development plan, formulated the exploration program, supervised surface geological mapping and geophysical surveys for siting production and injection ...

  • 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.

  • 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 ...


    By IWA Publishing

  • 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.

  • 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.

  • 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.

  • Case Study - Land Slide Investigation

    The landslide occurred on March 30, 2011. The maximum rainfall (53.1 kg/m2) has been seen in this month during a year. There is igneous rock that composed of tuff, andesite, dasite and basalt on the top of metamorphic schist, graphitic schist and serpentine. There are also basalt and limestone blocks. These blocks were split by fault and moved. The landslide body is consisting of schist and ...


    By Advanced Geosciences, Inc.

  • Analyzing and representing Downhole information on a daily basis using ESdat and Encom Discover - Case Study

    GHD used ESdat to optimize data collection and analysis and minimize data handling when working with downhole data information. 3D data output was provided by Encom Discover. Overview GHD is an professional services consultancy – 6000+ staff and offices in Australia, Middle East, Asia & Americas.  GIS used extensively within GHD with a ...

  • Enhanced selectivity and capacity of clinoptilolite for Cd2+ removal from aqueous solutions by incorporation of magnetite nanoparticles and surface modification with cysteine

    In this study, magnetic zeolite (MZ) nanocomposite modified with cysteine was developed in order to enhance selectivity and capacity of clinoptilolite for cadmium ion. The prepared MZ nanocomposite is containing clinoptilolite and magnetite nanoparticles with weight ratio of 3:1. The synthesized nanocomposite was characterized by transmission electron microscopy, X-ray diffraction and ...


    By IWA Publishing

  • Quantitative pipe condition assessment with Pipe Penetrating Radar

    Abstract Pipe Penetrating Radar (PPR) is the underground in-pipe application of GPR, a non-destructive testing method that can detect defects and cavities within and outside mainline diameter (>18 in / 450mm) non-ferrous (reinforced concrete, vitrified clay, PVC, HDPE, etc.) pipes. The key advantage of PPR is the unique ability to map pipe wall thickness and deterioration including voids ...


    By SewerVUE

  • With a stormy future ahead, study offers new tools for managing runoff

    These two words might make you sleepy: stormwater management. But they should make you scared. Or, if a new study can help shake things up, hopeful. Runoff carrying oil, salt, fertilizer, sediment and other pollutants is a top threat to lakes across the U.S., and several factors — including rising population, growing cities and changing climate — are ...


    By Ensia

  • Adsorption of Pb2+ from aqueous solution using spinel ferrite prepared from steel pickling sludge

    In this paper, spinel ferrite with high crystallinity and high saturation magnetization was successfully prepared from steel pickling sludge by adding iron source and precipitator in the hydrothermal condition. The obtained spinel ferrite was characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), vibrating sample magnetometer (VSM), and Zeta potential ...


    By IWA Publishing

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