1 underwater surveys with mobile arrays. 2 imaging with electrostatic arrays
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Underwater surveys with mobile arrays
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Imaging with electrostatic arrays
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2D2D
3D3D
2D and 3D models
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3D resistivity imaging
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3D electrode configurations
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3D survey strategies
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3D survey of a Roman villa, Orbe-Boscéaz (Switzerland)
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Anom alie >1500 ohm *m
1500 > Anom alie > 800 ohm *m
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3D survey of a Roman villa, Orbe-Boscéaz (Switzerland)
9Photos: P. Martínez Pagán, Universidad Politécnica de Cartagena
Organic pollutants
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Organic pollutants
Source: Martinez Pagan, 2006, PhD thesis
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3D imaging of a waste site
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3. Survey strategies and interpretation
Borehole and cross-hole surveys
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Measurements in boreholes
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Electrical well-logging
Source: www-ig.unil.ch/cours
15Source: Leroux, Palma Lopes, LCPC
Electrostatic measurementsin a single borehole
16Source: Leroux, Palma Lopes, LCPC
Electrostatic measurementsin a single borehole (pseudosection)
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2D cross-hole electrical tomography
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Cross-hole configurations
Source: Bing and Greenhalgh, 2000, Geophysical Prospecting 48
One remote current electrode One remote potential electrode
Four- electrode systems
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Anomaly effect
Source: Marescot, 2002, EEGS meeting, Aveiro, Portugal
Pole-pole pseudosection
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2D cross-hole inversion