Question

Which of the following gives an indication of the chemical quality of the groundwater?

(a) Geological logs

(b) Resistivity logs

(c) Sonic logs

(d) Thermal logs

This question was addressed to me in an interview for job.

I'd like to ask this question from Tube Well-2 in division Ground Water for Irrigation through Wells and Tubewells of Irrigation Engineering

Answer 1

Right answer is (b) Resistivity logs

To elaborate: Resistivity surveys are based on the fact that water increases the conductivity of the rocks and thereby reducing their resistivity. Resistivity logs indicate the values of electrical resistivity of the rocks at different depths.