Can I do TEM measurements in urban areas?
TEM measurements are not possible in urban areas due to the numerous sources of electromagnetic noise that are present.
TEM measurements should not be carried out in urban environments or, as a “rule of thumb”, within 150-200 meters of buildings/infrastructure. This is not only because of background electromagnetic ‘noise’ but also due to interference created by the system inducing electrical currents in local utilities, metal infrastructure and metallic objects.
For deep resistivity investigations in urban areas, you should consider traditional electrical resistivity methods as an option, such as VES (vertical electrical sounding) or imaging (also known as ERT – electrical resistivity tomography). These methods can have their own problems in urban areas, primarily the amount of space required to achieve a good depth of survey.
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