Frequently asked questions about geophysical surveys

Draig Geoscience is a specialist geoscience consultancy providing geophysical and geotechnical services for engineering, environmental, exploration, groundwater, hydrogeological and archaeological projects. Our services include geophysical data acquisition, processing and interpretation, technical review, 3D modelling and geotechnical investigations.

Near-surface geophysics uses non-invasive geophysical techniques to investigate the shallow subsurface and understand geological conditions beneath the ground surface. Draig uses these methods to identify geological boundaries, groundwater, voids, buried infrastructure and other subsurface features that may not be identified through conventional investigation alone.

Draig provides a range of geophysical techniques, including Electrical Methods, Electromagnetics (EM), Ground Penetrating Radar (GPR), Seismic Methods, Soil & Thermal Resistivity Testing and Potential Fields. The appropriate technique or combination of techniques is selected according to the project objectives, site conditions and required depth of investigation.

Yes. Geophysical techniques can assist in identifying geological structures and subsurface conditions associated with groundwater. Methods such as Electrical Resistivity Imaging (ERI) and Electromagnetics (Frequency-Domain and Time-Domain) can help investigate depth to groundwater, groundwater preferential pathways, aquifers and aquitards, and environmental seepage plumes from tailings storage facilities (TSFs).

Yes. Geophysical surveys can help identify and map potential voids/cavities and subsurface anomalies. Depending on the ground conditions and investigation objectives, Draig can use techniques such as GPR, electrical resistivity and gravity to investigate potential void/cavity locations.

Yes. Geophysical techniques can assist in locating buried services and infrastructure, including metallic pipes, conduits, cables and other buried objects. Draig can combine techniques such as GPR, electromagnetic and magnetic surveys to improve the identification and interpretation of buried infrastructure.

Yes. Draig provides geophysical and factual geotechnical services that can complement conventional ground investigations. Geophysical techniques can help investigate bedrock depth, soil and rock properties, voids, cavities and groundwater, while geotechnical testing can provide additional ground-truth information.

This is dependent on project objectives, geological setting, target depth, site conditions, site access and required data resolution before recommending an appropriate geophysical method or combination of geophysical methods. Multiple geophysical techniques can also be integrated to provide a more comprehensive subsurface interpretation.