Friday, March 9, 2012

Electrical Resistivity Survey



Hi Folks,

We did a electrical resistivity survey 2 months back.It was done by a geologist from dharmapuri.
Indeed we tried the methods of water diviners like stick , coconut etc, but I was very skeptic about those results. I was actually worried about the cost involved in digging a big size well.

We opted to go for a open well instead of borewell because of the shallow depth of the groundwater.
I was behind a person based out of rajajinagar, bangalore for electrical resistivity survey, he is really a crazy money minded guy who kept delaying things and wasted several months for his appointment.

Then we came to know about this geologist from dharmapuri who did the survey and suggested us 3 points.

We estimated that it will take almost 3 lakh rs to dig a well of 30 feet diameter and not ready to take a risk without test bore.

Please look at the next post for the process of digging test bores.

Regards
Mohan


What is electrical resistivity survey ?

Just simple physics if I am not wrong, place a line of four electrodes, pass electricity in the outer electrodes and find the trend of the voltage in the inner electrodes. Based on the results he will diagnose the kind of rocks and water flow underneath the points.

4 comments:

  1. pls can u give me the contact details of the geologist from dharmapuri.
    thanking you in advance

    ReplyDelete
  2. good explanations about electrical resistivity...
    thanks for sharing

    ReplyDelete
  3. Interesting, so basically for ERS, you need to have test borewells?

    ReplyDelete
  4. Interesting, so for ERS, do we need to have test borewells?, how did you come to a conclusion on the place where you need to dig a well and its depth decision

    ReplyDelete