Bangalore

Pages

The driller probably reached this sandy layer after pinching out a hard clay layer and sand was coming out below the clay roof. Then its better not to put the strainer and keep it open at the bottom of the well so that it would behave as a Cavity type Well. Cavity would be formed in the water bearing stratum at the bottom of clay roof during drawing of water from the bottom of the well and water from the aquifer will enter the well pipe through this cavity in a spherical pattern of flow.

Topics

Sub-Categories

Regions

The geology of Bangalore is such that bore wells can be drilled by using Down-The-Hammer (DTH) rigs requiring several tens of feet space for up-and-down vertical movement of the drilling shaft. The space of 10 feet available between the ground level and the roof of the parking area is too small for taking up drilling.

If one can manage and face the associated problems, one can take up construction of the bore well in the neighbour's house where a well could be drilled or in the road poramboku abutting his/her house.

Topics

Sub-Categories

Regions

Next to the open well, one can drill a 4” diameter borewell, with compressor fitted stand drilling rig. In that case, it is not necessary to take the rig very close to the point of drilling. But you can drill only upto 250-300 feet using this method. Inside the openwell, drilling is not required as there would be lots of management issues in future.

Contributor: C.Vijayakumar

Topics

Sub-Categories

Regions

The best course of action would be to find out a local pump supplier who can test your borewell and install a suitable pumpset that discharges enough water. If enough water does not come out, then you lose only the testing charges. If enough water comes out, then the pump supplier will be able to sell you a pump set besides collecting testing charges.

Contributor: R Jagadiswara Rao (https://www.indiawaterportal.org/users/rjagadiswara)

Topics

Sub-Categories

Regions

The contamination will move towards the new borewell also as there is a direct linkage which was established while drilling itself. More over 6 ft is not enough distance to ensure clean water.

First try to hyper-chlorinate the old borewell, and then try to seal it off by pouring rock aggregate right up to 70 ft and then pour concrete in the remaining upper 70 ft to seal that borewell. Before using the new borewell, hyper-clorinate that well too, and then install a temporary test pump and use the borewell for at least 2 to 3 weeks before going in for a permanent pump.

Topics

Sub-Categories

Regions

Due to wear and tear or corrosion, the falling of pipe and motor is quite common in bore wells. The bore well companies and pump mechanics have special tools to fish out the same. Kindly contact a pump mechanic's shop, pump/motor selling shop or pump distributor. They will have the list of such specialist mechanics who can fish out the pipe and revive the bore. Please note that fishing out pipe/motor is a specialised job and it is important to engage the right mechanic for the same even if you have to pay a little more.

Topics

Sub-Categories

Regions

Please refer to http://coffee-table.4894995.n2.nabble.com/file/n4942112/Borehole.xls sheet which has a table that facilitates self-diagnosis. It also lists various factors that can affect borewell performance and parameters that can be monitored.

Contributor: The Community Engineer  (https://www.indiawaterportal.org/users/thecommunityengineer)

Topics

Sub-Categories

Regions

If there was loose and friable material encountered at the depths mentioned where one struck small quantity of water then one should install the inner casing all the way down to the depth at which water was finally struck. It will prevent the fine sand etc. from entering into the well, filling up the borewell and jamming the pump. If there was no soft or friable material encountered, then there is no need to install this casing.

Topics

Sub-Categories

Regions

 

IIHS

The Indian Institute for Human Settlements (IIHS) is a national education institution committed to the equitable, sustainable and efficient transformation of Indian settlements. IIHS is India’s first prospective independently funded and managed inter-disciplinary National University for Research and Innovation that focuses on its ongoing urban and development transformation. It is a first-of-its-kind, practice and innovation-oriented knowledge institution that seeks to bridge the conventional excellence, scale and inclusion divide.

Description:
The PWP-UD is a full-time, eight-month Post-Graduate Certificate Program intended for early and mid-career working professionals who want to augment their competencies and professional worth; add significant value to or change their career tracks.

July 2, 2012 12:00AM

Attachments

Topics

Sub-Categories

Regions

 

Arghyam

Arghyam is a public charitable foundation setup with an endowment from Rohini Nilekani, working in the field of water and sanitation in India since 2005. ‘Arghyam’ is a Sanskrit word meaning ‘Offering’. Our vision is “Safe, sustainable water for all”.

Description:

Arghyam is looking for full-time Manager, for their Research division, to be based in Bangalore.

July 10, 2012 12:00AM

Attachments

Topics

Sub-Categories

Regions

Pages

Subscribe to RSS - Bangalore