- Dewatering design
- Hydrogeological studies
- Numerical modelling
- Soil & groundwater remediation
- Geothermal energy storage
- Geophysical prospection & camera inspection
Geophysical prospection & camera inspection
Borehole logging: the accurate solution to characterize borehole profiles
AGT owns geophysical sensors of Robertson Geologging Ltd, which are specifically designed for groundwater-related applications. The sensors
are extra slim to fit in small diameter boreholes and piezometer tubes, down to a depth of 500 m. With the Dual Induction probe (~EM39), existing piezometers can also be logged. The following probes can be immediately deployed:
- 3-arm Caliper: borehole diameter;
- Electric logging (SN, LN, SP and SPR): lithology and groundwater salinity;
- Natural gamma-radiation: clay layers;
- Dual induction: lithology and groundwater salinity, also in piezometers;
- Camera inspection: of existing wells or piezometers.
Figure: camera inspection of well filter in white PVC.
Near-surface geophysics: mapping the underground from the surface
- Determination of optimal drilling locations;
- Mapping of water-bearing layers for fresh water supply;
- Detection of underground utilities or object (gaz tanks, foundations...);
- Identification of fractures and cavities (karst);
- Monitoring of fresh water-salt water interface.
- Electrical resistivity tomography (ERT);
- Electromagnetic induction (EM);
- Ground penetrating radar (GPR);
- Seismic refraction;
Figure: depth mapping of sweet-salt groundwater interface with EM34-measurements.