MAPPEM Geophysics Inspection, Survey & Testing
Marine Electrical Resistivity Tomography
Resistivity imaging surveys of the marine subsurface in coastal areas for infrastructure, MRE cable routes and dredging.
Description
MAPPEM Geophysics carries out marine electrical resistivity tomography surveys that image the electrical resistivity of the sub-bottom. Resistivity reveals the compaction, density, type and geometry of the subsoil, and the method works in all coastal areas regardless of water depth or substratum.
Key features
- Surveys with the MAPPEM and MAPPEM-S systems
- Imaging beneath acoustic masks such as gas-bearing sediments, where seismic imaging is limited
- Strong resistivity contrast between sedimentary (e.g. sand) and rocky areas
Applications
- Site investigation for maritime infrastructure
- MRE sites and cable routes, such as the karstic limestone at the Saint-Nazaire MRE site
- Sand detection and rock avoidance for dredging
- Guiding geotechnical campaigns
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