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Open Well Troubleshooting : Options ?

I have a domestic well (not bore well) very near to my house in Kottayam district, Kerala. It is around 50 to 60 feet deep. Four years earlier it had water, currently water is not available when there is no rain. It is full of rocks at the bottom. My questions are:

1. If I dig further will there be the possibility of striking water ? To know this, will a scientific method wil help ? (a geophysicist or hydrologist) as in the case of borewells?

2. If yes, can the experts please suggest suitable contacts here in Kottayam?

3. Now the most importanr question: Since the well's bottom is rock, the conventional method to dig further is to remove the rock by explosives. But people say it should not be done because the house is very near to it. Is it true ? If yes please let me know is there any other method, by which I can remove the rock ? Is there any scieintific method available ?

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1. Dear Member,  As per the

Dear Member,
 
As per the information, it may not be posible to get the water even from the borewell.
 


I would suggest you to contact the local hydrogeologists working in the State Government.
 
With regards,
 
Professor Nandipati Subba Rao
Department of Geology
Andhra University
Visakhapatnam

2. Open Well Troubleshooting - Options

 Dear S Varghese,

Here are the answers to the questions you have raised :

 

1. If I dig further will there be the possibility of striking water ? To know this, will a scientific method will help ? (a geophysicist or hydrologist) as in the case of borewells?

Ans: Whether a borewell or open well the scientific methods used are the same and yes a good Hydrogeologist should be able to give you the answers you are seeking.

Instead of wasting money on speculation, as there is no 100% guarantee that the inferences made by the hydrogeologist would prove to be true.There is always a risk of meeting with failure.

I would rather suggest that you get in touch with a borewell drilling company, and arrange for an inwell to be drilled in the base of the well.

First you will have to get the well cleared of any loose material( rock or sand) then try to see if you can locate a fracture or joint along the base of the well and try to drill at that location. This kind of drilling is usually a  4.5 inch diameter, and referred to as an In- Well drilling ( drilling within an open well)

You could drill for about 200ft or more within it if required, but if you plan to deepen the well further it would be practical only to drill about 50 ft. If you strike any moisture or water in this test well, you could excavate this well to that depth.

2. If yes, can the experts please suggest suitable contacts here in Kottayam?

Ans: To this question - I really am at a loss I really do not know any one who operates in that area, but your local ask me service should be able to provide you with a few contacts.

3. Now the most important question: Since the well's bottom is rock, the conventional method to dig further is to remove the rock by explosives. But people say it should not be done because the house is very near to it. Is it true ? If yes please let me know is there any other method, by which I can remove the rock ? Is there any scieintific method available ?

Ans: It is ture that explosives are not allowed to be used in residential areas, you could still go in for using explosives but under controled conditions so that no debris flies out and damages the houses. It is necessary to take legal permisions for such kind of excavations, and even under controled conditions, there is no gurantee that the neighbouring  houses are not disturbed.

Another method used is called rock spliting where holes are drilled and with hydraulic pressure the rock is split along joints. This is  a fairly expensive way of excavating, but one gets quick results.

The last method is to use a compressor and hand held pneumatic hammers this is a slow proces but one can manage to excavate hard rock using this technology.

Naturally after the rock is excavated it will have to be lifted out  using some kind of lifting equipment.

All the best.

Regards

Dr. Anil Lalwani

www.wellwaterworks.com.

3. Dear Member, It would be

Dear Member,



It would be appropriate to go for a borewell inside the dug well. It is simpler & cost effective. Blasting, etc. is not advisable.  It is good to take advice of geophysicist for fractures at depth.


With regards,


D. Chakraborty
Scientist
Central Ground Water Authority (CGWA)
Raipur

4. Dear sir,  In Kottayam, you

Dear sir, 

In Kottayam, you can approach  the District Ground water department which is located in Civil Station near the city town private busstand.They will help you in locating the site for the well and  also to dig the well in reasonable rate.Before taking a decision please contact the department and get their advice in this regard.

5. What distance should be maintained between two wells?

Hello,

I started to dig an open well in my land at a village panchayat locality limit. The open well is now just 117 cm from my neighbouring land.

After digging the well up to 7  meters ,the neighbour complained to panchayat secretary for not complying with the distance to be maintained between adjacent wells.

I am extremely worried and would like to know what is the procedures to be followed and can I continue digging the well in my land?

Thanking you

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