Discussion
Electrical resistivity surveying is particularly useful for locating
Answer: D
Correct answer: the water table and variations in saturation
Resistivity depends strongly on the amount and salinity of the pore water, so a saturated horizon contrasts sharply with a dry one above it. That makes the method well suited to locating the water table, tracing saline intrusion and mapping clay content. It says nothing about strength or structure.
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