COMPARISON BETWEEN SCHLUMBERGER ARRAY OVER WENNER ARRAY

COMPARISON  BETWEEN SCHLUMBERGER ARRAY OVER WENNER ARRAY

Find below the pros and cons of Schlumberger Array over Wenner Array and vice versa

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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.

Types of VES Curves

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