Subsurface Characterization

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Subsurface Mapping and Imaging

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Soil and Rock Characterization

  • Ground Penetrating Radar (GPR)
  • Seismic Refraction
  • Seismic Reflection
  • Electrical Resistivity Imaging
  • Deep Time Domain Electromagnetics
  • Electromagnetic Induction Terrain Conductivity
  • Multichannel Analysis of Surface Waves
  • Gravity Method
  • Passive Shear Wave Velocity Testing
  • Very Low Frequency Electromagnetic Surveys
  • Borehole Televiewers (Optical & Acoustic)
  • Horizontal-to-Vertical Spectral Ratio
  • Cross-Borehole Seismic Tomography
  • Magnetic Method
  • Induced Polarization
  • Natural Gamma Log
  • Seismic Full Waveform Inversion
  • Borehole Nuclear Magnetic Resonance (NMR)
  • Compensated Density Log
  • Electromagnetic Induction Borehole Logging
  • Electric Log
  • Full Waveform Sonic (FWS) Log
  • Gamma-gamma Density Logging (GDL)
  • Neutron Log
  • Suspension Logging
  • Temperature Logging
  • Borehole Radar

Mapping Groundwater Surface and Flow

  • Electrical Resistivity Sounding
  • Electrical Resistivity Imaging
  • Deep Time Domain Electromagnetic Soundings (TDEM)
  • Seismic Refraction
  • Surface Nuclear Magnetic Resonance
  • Self Potential
  • Very Low Frequency Electromagnetic Surveys
  • Borehole Nuclear Magnetic Resonance (NMR)
  • Electric Log
  • Heat Pulse Flowmeter
  • Spinner Flowmeter
  • Electromagnetic Flowmeter
  • Fluid Temperature/Fluid Conductivity Logging
  • Borehole Televiewers (Optical and Acoustic)

Detecting Manmade Subsurface Features

  • Magnetic
  • Shallow Time Domain Electromagnetics
  • Ground Penetrating Radar (GPR)
  • Passive Shear Wave Velocity Testing
  • Electromagnetic Induction Terrain Conductivity (EMI)

Geophysical Methods to Determine Physical Properties

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Determining Engineering Properties of the Subsurface

  • Seismic Refraction
  • Surface Nuclear Magnetic Resonance
  • Ground Penetrating Radar (GPR)
  • Multichannel Analysis of Surface Waves
  • Cross-Borehole Seismic Tomography
  • Suspension Logging
  • Borehole Nuclear Magnetic Resonance
  • Crosshole Seismic Testing
  • Compensated Density Log
  • Full waveform Sonic (FWS) Log

Determining the Rippability of Rocks

  • Seismic Refraction
  • Passive Shear Wave Velocity Testing

Mapping Voids, Sinkholes, Abandoned Mines and Other Cavities

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Methods

Mapping Susceptible Soils

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Methods

  • Electromagnetic Induction Terrian Conductivity
  • Resistivity Methods
  • Deep Time Domain Electromagnetics
  • Induced Polarization

Working Platform/Load Transfer Platform Evaluation

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Methods

  • Multichannel Analysis of Surface Waves
  • Passive Shear Wave Velocity Testing
  • Horizontal-to-Vertical Spectral Ratio (HVSR)