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Dear Subramanian,

Further to the exhaustive guidelines furnished by Dr. Mihir Maitra to your query, you can find some additional guidelines for selecting a suitable submersible pumpset for your bore well.

Groundwater occurs in the Hosur area in scanty amounts at shallow depths under water table conditions and in moderate amounts in one or more water-bearing fractures within hard rock under artesian conditions. Owing to overexploitation of groundwater, you cannot expect large yields except when bore wells are sited along fracture lineaments with large openings.

A 6” borewell submersible pumpset normally works on 3-phase, 380 volts, 50 Hz power supply. The type of submersible pumpset you have to select depends primarily on your water requirements and the extent to which your bore well meets those requirements. In the absence of information on the non-pumping and pumping levels of water in your 600-feet bore well, you may assume a lift against a head of 550 feet. A radial flow submersible pumpset with 10 to 15 HP and 25 to 35 impeller stages is best suited for this purpose. Depending on the yield of the bore well, discharge ranges from around 5,000 to 15,000 litres/hour through a 1½” to 2” delivery pipe.

Best wishes,

Dr. R. Jagadiswara Rao
Retired Professor of Geology
Sri Venkateswara University
Tirupati, AP 517502

Dr. R. Jagadiswara Rao, Professor of Geology Retired, Sri Venkateswara University, Tirupati, AP 517502, India


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