Geophysics
Geophysics is a method of imaging the subsurface using induced electromagnetic or magnetic fields. It has a number of uses since it gives the engineer the ability to learn subsurface information without intrusive testing. Underground structures and soil information can be discovered without compromising existing surfaces or the requirement for time-consuming digging and testing.
Use of Geophysics
Geophysics can be used successfully for any of the following:
Buried metal, fill or structure detection
Contaminant plume mapping and monitoring
Aquifer search and stratigraphy mapping
Fracture and void detection
Well screen and packer test positioning
Environmental engineering
Geotechnical engineering
Mineral exploration
Archaeological investigations
Ordnance detection
Marine investigations
Geophysics surveys can be carried out over conventional grids or with Real-Time DGPS-navigation systems. The technology is used for a wide variety of applications including mining and exploration, environmental related concerns, forensic and archaeological investigations. Each method requires different geophysical methods and techniques.
Electromagnetic Method (EM)
Electromagnetic (EM) and Magnetic surveys are the most common geophysical methods used for environmental site audits, site remediation, and site assessments. An EM survey can outline areas of potential concern on site that merit additional investigation.
Ground Penetrating Radar (GPR)
GPR surveys are carried out for a wide variety of applications including:
Tank locates
Depth to water table
Depth to bedrock
Detection of contaminants (conditions permitting)