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Geophysics · Problem type
Which method finds this target
Use this for “A survey must map a plume of salty groundwater under a field. Which geophysical method suits it best?”
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Which method finds it best?
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Pick the method whose property differs most between the target and the rock around it.
Assumptions
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Each method senses one contrast: density (gravity), magnetized minerals (magnetics), electrical resistivity, radar echoes off changes in permittivity, or seismic echoes off layer boundaries.
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A target shows only if it differs from its surroundings in the property the method senses.
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Radar reaches meters down; seismic reflection reaches kilometers.
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