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Methods
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With depth
Vertical Electrical Sounding (VES)
Shows how resistivity changes with depth at a given point.
Basis for: grounding grid design and groundwater investigation.
Delivers: layered resistivity model
Along a line
Electrical Profiling (ERT)
Shows resistivity changes along a line, as 2D sections.
Identifies: geological contacts, faults, fractures and cavities.
Delivers: 2D resistivity sections
Complementary
Induced Polarization (IP)
Complements resistivity in telling materials apart.
Distinguishes: clays, mineralized zones and contaminated areas.
Delivers: chargeability of materials
NBR 7117-1 · NBR 15749
NBR 7117-1: soil resistivity measurement and layered soil modeling for grounding design. NBR 15749: measurement of grounding resistance and surface potentials.
Where we apply it
Applications
Transmission lines and substationsWind and solar farmsCavity investigationWater resources
On our blogSoil resistivity and grounding design: what NBR 7117-1 requiresRead article →
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