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What is a borewell?

A borewell is a well of 4½”,  to 12" in diameter drilled  into the earth for retrieving water. In this 4½” and 5½” Borewells are commonly for Domestic purposes while 6½“ and more are for Commercial / Industrial purposes.  A borewell is cased in the region of loose subsoil strata open in hard rock or in crystalline rock . High grade PVC pipes are used for Casing in borewells. The depth of a borewell  can vary  from 50 feet  to 3000 feet.

How do we find-out the availability of water in the land?

The best way to find out whether water is available in your land is to investigate using any geophysical techniques adopted by a qualified hydro geologist. We offer the service of  Experienced Senior Ground Water Surveyor's crew for  finding most suitable site using the latest Computerized Sound Survey Systems. Their findings are 90% accurate.

 

Techniques used in drilling of a borewell :

Ancient techniques utilized driving of tubes inside the earth to drill well using mud or water as a liquid media. Then after the invention of diesel engines, rotary drilling was used to remove cores  out of the earth. This was called calex method. There are several methods used for drilling Borewell. Most commonly used are Compressor Drilling, Manual Drilling and Rotary Drilling+. Compressor Drilling is done with the vehicle fitted with High Power Hydraulic Air Compressor Machine. It is commonly used to drill on soil surface and hard rock. Another method is by manual Drilling or Hand Bore. This is most suited for lands with Clay or Sand. All these drillings will be at 4 ½”, 5", 6½”, 7" & 8½" Dia. Air compressors and pneumatic drilling equipments are used to drill  borewells up to 3000 feet. The rates for drilling a borewell depends on the location, nature of soil and availability of water.

+ Pictures are available in services page.

What is the difference between a borewell and a tubewell?

A borewell is drilled with casing pipe put only up to the soil-rock boundary and this is done normally for shallow depths in hard rock or in crystalline rock. But in a tubewell, the casing pipes are put up to the bottom of the borewells, with perforation in the pipes in some level. Normally the  Tubewells are drilled in  sand and gravel where the availability of water is much below the ground level.


  borewell diagram


What are  Filterpoint, Calyx, Rotary and Hand bore ?

Filterpoint Wells, Hand bore wells, Calyx wells and Rotary Wells are diffent types of Tube wells. Filterpoint Wells are done in the costal areas ranging from 10 ft – 40 ft. Hand bore are manually drilled tube well which may range from 20 – 200 ft. in depth and 4”- 8” in diameter. Most of the hand bore wells need periodical cleaning/Flushing. Rotary wells are constructed using seperate Rotary Rigs which range from upto 2500ft depth with 30” diameter. It is usually done in  salinity areas. Calyx Wells is a miniature type of Rotary well which is inaccessible to Rotary rigs.  The depth varies from 100-600 ft. and the diameter is from 5”-12”.

What care must be done while drilling a borewell ?

While drilling a borewell we have to insert pipes called Casing pipes. It can be PVC/GI. This is done to prevent the Surface water with Sand from entering inside the borewell. These Pipes are fixed inside the hard rock under the soil. Casing  pipes are of 4 - 8 Kgs. Some of the contractors compromises with this casing pipes to reduce drilling cost. We discourage it. Because it will lead to future problems like bore silting, muddy water etc. Filtering can also be done to prevent muddy water and for getting surface yield. Borewells must be kept closed to prevent something to fall inside it and block the bore. Pumps must be installed as soon as possible to avoid bore silting and damage. Dont allow small children to play near the borewell which had a larger diameter, more than 6". Periodical cleaning must be done to retain yield and quality of water.

We recommend to use high quality ISI mark casing pipes with correct measurement & thickness for long life of borewells.




Did all borewell yield water ?

According to us most of the borewells yield water. Only a few of them were dry. We had drilled 85% of borewell with high  yield 10% with good yield & 5% with no yield.Our Water divining success rate is 90% - 95%.

We recommend  to clean/flush your borewell on every 5 year to retain the yield & quality of water.

Why borewell fails ?

All the locations indicated by a geophysical  survey at their respective locations are interpreted from the resistivity values which are far better than those obtained from the surrounding regions of the area surveyed , these locations contrarily have resistivity values indicative of massive hard rock with absolutely no fractures or seepages of water within them. Under the conditions of crystallization of basalt, innumerable vesicles are formed, thus creating air pockets within the mass of hard rock, The resistively of these vesicular crystals remain in a similar range as those of soft weathered rock through which seepage of water is likely. Hence, in case pockets of these are encountered a probability of a decrease in yield of the aquifer bodies in the boreholes is possible. Thus all results are interpreted from a complex natural system of heterogeneous nature. Hence, variations in the results cannot be totally ruled out.

What types of Pumps are used in borewells ?

Most commonly used pumps for borewells are Submersible pumps, Hand pumps and Compressor pumps. All types of pumping systems from 0.25 monoblocks to 50 HP Submersible pumps, Monoblocks, Centrifugal jet, Borewell submersible, Compressor pumps, Hand pumps, Solar Submersibles, Pressure boosters, Piston Pumps, Turbine pumps etc. can also be used.  It depends upon the availability of water & the depth of borewell. Testing can be done for checking the discharge quantity of water from the borewell. We have professional geologists for testing and they will recommend the pump suitable for your borewell. We also provide the facility for taking water from borewells without installing Pump sets. No electricity is required for this. Most suitable for remote locations with no power.

Whether there is any restrictions for drilling borewell in any place of Kerala?

There are restrictions in some places of Kerala. According to Govt. authorities a few blocks* in Kerala are found to have a low ground water level. Some of these places where in Kasargod, Kozhikkodu, Kodunjallor in Trissur,Chittoor in  Palakkad and Athiyannoor in Trivandrum Dist. If you are a resident of any of this place then please contact to the authorities before drilling a borewell.

+ * Subjected to change periodically.

Is  borewell water  pure for domestic use?

The borewell water is purer than fresh river or lake water. It will still have dissolved solids and salts and minerals. Some of the borewell water will be hard water. It is advisable to test the borewell water before drinking, if you have any doubts on its freshness.


Importance of Conserving our water resource.

As you know our water resource is reducing day by day, We have to preserve it from all means of contamination and over use. Borewell's life also depends on the availability of water. When we continuously utilize any water resource it will gradually came to extinct. To avoid this we have to save soil and rain water. We must restore as much as water we utilize from earth.

During the warm summer months most of us are guilty of using too much water for tasks like watering our lawns and gardens, and while we all want our homes to look good, this puts an enormous strain on local water supplies. So why not consider collecting and using rainwater? You can collect and reuse rainwater for non-drinkable uses, like watering the garden, crop irrigation and flushing the toilet. If we follow Rain water harvesting our borewells and other water resource will remain for ever and thus able to protect our nature. So remember :

WATER IS PRECIOUS CONSERVE IT FOR FUTURE USE