Monday, September 1, 2014

Water at 9ft below ground Level - on Sarjapura Road

Dewatering and Pumping
Trinity Woods and Acres is a 7.5 acres residential community. As part of Rainwater Harvesting implementation it was decided to dig a 6ft diameter and 40ft deep recharge well at one of the lowest points in the layout that is near their currently yielding borewell (which is adjacent to Sarjapura Road)

6ft of Water
Dewatering with a bucket does not work out
Work proceeded uneventfully till we struck water at about 9ft. The water had no odour, looked clean , pH 7.5 and TDS 1100ppm. The water seemed to continuously flow in at about 6-10 litres per minute. This made further digging difficult and with a dewatering pump we were able to deepen the well only till about 15ft below ground level. Water had to continually be pumped out every 5-10 minutes to aid digging.  Rings were placed immediately to prevent the collapse of the mud walls.

Discussing Next Steps
Work was temporarily put on hold due to Ganesh Chaturthi. When we returned 4 days hence to the well this morning we saw clean water - about 6-7ft of it ( 5000 litres +). The apartment is of course very happy and would like to see the well as a source of water

Some of the key questions to which we would like to find answers for are :

  1. How much water will this well yield per day and for how many days of the year ?
  2. Is this rainwater ? What is causing the high TDS .
  3. Covering the Well temporarily - after End of Day
  4. How are the soil/rock layers below this source of water ? How is it that water is available at 9ft below ground level and not at 1000ft below ground level in the same vicinity
Further monitoring and data collection  will reveal interesting results. We are quite looking forward to it


Karan said...


Natarajan Venkatasubramanian said...

Sounds good. I am expecting few more updates on this.

And I want to know where in Bangalore, I can test our bore well water? Is it possible to do it on our own? Please guide me.


Biome Trust said...

Thanks Karan !!

Dear Natarajan,

You can get your borewell water tested at
1. Essen and Co
No 106, 8th Main road, off 18th cross, Malleshwaram West, Bangalore - 560 055
Phone 080 23341230 / 23341567

Ion Exchange Services Limited,
C-73 & 82, Devasandra indl. Estate,
ITPL White field Road,
Mahadevapura post,
Bangalore - 560048

Office: 080-22042888
Mobile: 99860 64492

3. Chief Chemist
No.49, Khanija Bhavan,
Race Course Road,

080- 22384134 (O)
080- 26563897 (R)

Alternately you can also purchase a hand held TDS meter or a water testing kit. PLease do write to for any other specific details that you may require