Apparent resistivity is the measure of
the earth resistivity between two
point which correspond to the sensitivity
the ground would have if it were homogenous.
Resistivity is one of the properties used
to detect any matter, as no two substances have equal resistivity. In electrical
resistivity method there are two device used in determining the apparent
resistivity, a schlumberger array and wenger array. They are four electrode
device, two as current electrode used for introducing current into the earth
the other two electrode called the potential electrode used for detecteing the
earth voltages.
Electrical resistivity method is one of the
geophysical tools used in finding earth surfaces structures (profile and
matters). Vertical displacement method or electrical drilling and horizontal
profiling method both used in probing the earth’s sub-surface from the surface
in electrical resistivity method.
The electrical drilling method is
generally to determining the presence and depth of resource like water level,
oil level, mineral deposit etc while the horizontal profiling id for
determining the size and spread of a
mineral deposit , crude or water spread.
from the diagram above
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