Geophysical method
ARP®
Electrical resistivity
Current does not cross sand the way it crosses clay. That is the whole principle — and it is measurable continuously, at working speed.
How it works.
Electrode wheels inject a current into the ground and measure the resulting potential difference. The ratio of the two gives resistivity: a physical property governed by texture, water content, porosity and stone load.
The array is patented by GEOCARTA and towed at working speed. Several electrode spacings measure several investigation depths simultaneously — hence three maps from a single pass, not three passes.
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Depths
Several, simultaneous
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Deployment
Towed, continuous
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Ground contact
Electrode wheels
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Deliverable
Georeferenced resistivity maps
What it reveals.
- Usable soil depth and rising bedrock
- Texture: clay, sand and stony zones
- Compaction and plough pans
- Intra-parcel heterogeneity
- Ditches, made ground and buried structures
Where we use it.
Our reference method: the best ratio of area covered to information obtained.
Map with resistivity?
Let's talk area, useful depth and timing.