Groundwater quality assessment using electrical resistivity tomography - A case study from Tiruppur (TN)

The study is very good and it is the need of the hour as WATER is controlling everything. Congratulations to the team.

Some of the reflections on the study are as follows:

1. The resistivity methodology is well established. The electrode set up in DP DP deviates from the conventional set up like Wenner and as such comparing these two set ups with respect to their Depth of Investigation or any other parameter may not stand. 
2. Water zones were delineated with respect to the true resistivity computed with the software. 
3. Standard water quality templates i.e., quality v/s resistivity would have helped to know the situation in respect of quality elements. 
4. Mapping the pollution on one or two i.e., as done at Pethichettipuram may help to map the pollution on the line leaving no clue on its extension and no solution to the given problem. 
5. The coverage of such study in the whole area would have given the extent of pollution i.e., both lateral and vertical including the source. This would have helped to know the extent and severity of the pollution and to suggest suitable measures to the concerned authority for suitable remedy as every study should lead for the conclusion and problem solving solution and thus to reduce the GAP existing between the LAB & LAND. Hope this helps to plan such studies with problem solving solutions / strategies.