What is a bore well?
A bore well is a well of 4 1/2", to 12" in diameter drilled into the earth for retrieving water. In this 4 1/2" and 51/2" Bore wells are commonly for Domestic purposes while 6 1/2â€œ and more are for Commercial / Industrial purposes. A bore well 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 bore wells. The depth of a bore well can vary from 150 feet to 1500 feet.
What is the difference between a bore well and a tube well?
A bore well 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 tube well, the casing pipes are put up to the bottom of the bore wells, with perforation in the pipes in some level. Normally the Tube wells are drilled in sand and gravel where the availability of water is much below the ground level.
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. By 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 bore well :
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 calyx method. There are several methods used for drilling Bore well. 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 1/2", 5", 6 1/2", 7" & 8 1/2" Dia. Air compressors and pneumatic drilling equipments are used to drill bore wells up to 3000 feet. The rates for drilling a bore well depend on the location, nature of soil and availability of water.
What care must be done while drilling a bore well?
While drilling a bore well 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 bore well. These Pipes are fixed inside the hard rock under the soil. Casing pipes are of 4 - 8 Kgs. Some of the contractors compromise with this casing pipe 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. Bore wells 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. Periodical cleaning must be done to retain yield and quality of water.
We recommend using high quality ISI mark casing pipes with correct measurement & thickness for long life of bore wells.
Did all bore well yield water?
According to us most of the bore wells yield water. Only a few of them were dry. We had drilled 85% of bore well with high yield 10% with good yield & 5% with no yield. Our Water divining success rate is 90% - 95%.
We recommend clean/flush your bore well on every 5 year to retain the yield & quality of water.
Why the bore well 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 bore wells?
Most commonly used pumps for bore wells 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, Bore well 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 bore well. Testing can be done for checking the discharge quantity of water from the bore well. We have professional geologists for testing and they will recommend the pump suitable for your bore well.
Is bore well water pure for domestic use?
The bore well water is purer than fresh river or lake water. It will still have dissolved solids and salts and minerals. Some of the bore well water will be hard water. It is advisable to test the bore well water before drinking, if you have any doubts on its freshness.
Conserve 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. Bore well'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 bore wells and other water resource will remain forever and thus able to protect our nature. So remember :
WATER IS PRECIOUS DON'T WASTE IT. CONSERVE IT FOR FUTURE