Electrical Resistivity Testing (VES) in Swindon: Subsurface Profiling for Infrastructure Projects

Depth penetration depends on the array aperture and the subsurface resistivity. In the conductive Oxford Clay, we typically achieve 50 to 80 metres with an AB/2 of 200 metres. In the more resistive Corallian limestone south of Swindon, the same array can reach beyond 100 metres. The limiting factor is signal-to-noise ratio, not equipment capability.

A single VES sounding in the Swindon area ranges from £460 to £890, depending on the maximum depth required and site access conditions. A 2D ERT profile typically falls between £1,200 and £2,400 per line. We provide fixed-price quotations after reviewing the site location and project objectives.

Yes, it can be. The overhead catenary lines along the Great Western Main Line generate 50 Hz electromagnetic noise. Our acquisition system includes notch filters and stacking routines to suppress this interference. We also orient survey lines perpendicular to the tracks where possible and use shorter current injection cycles. Historic maps help us avoid buried metallic debris from the old railway works.

The reference range for this service in Swindon is £460 - £890. The final price depends on the project scope and volume.

VES is a 1D method. It measures resistivity variation with depth at a single point. ERT is a 2D method. It produces a cross-section of resistivity along a line. We use VES for quick depth-to-bedrock reconnaissance or groundwater exploration. We use ERT when lateral changes matter, like mapping clay-lens boundaries or locating abandoned mine shafts in the limestone. Both methods use the same physical principle and equipment.