COMPARISON BETWEEN
SCHLUMBERGER ARRAY OVER WENNER ARRAY
Find below the pros and cons of Schlumberger Array over
Wenner Array and vice versa
Advantages of using Schlumberger Array over Wenner
It
requires less manpower and time than Wenner soundings.
It is
less sensitive to lateral variations in resistivity.
The potential electrodes are moved
only occasionally; In a Wenner sounding the potential and the current
electrodes are always moved after each measurement.
It is faster in field operation.
Requires less physical movement of
electrodes than the normal Wenner array because only the current electrodes
must be moved between readings.
The effects of near surface,
lateral inhomogeneities are less on Schlumberger measurements when compared to
Wenner measurements.
In industrial areas, stray currents
and telluric currents that are measured with long spreads have effect on
measurements made with the Wenner array more than those made with the
Schlumberger array.
Advantages of Wenner array over
Schlumberger Array
Easier to calculate the apparent
resistivity.
Wider spacing of the potential
electrodes results in larger potential differences.
Requires small current
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