Hunasamaranahalli is a small town located 22 kilometres from Bengaluru city and comes under Yelahanka taluk, Bengaluru Urban district of Karnataka. The Town Municipal Council (TMC) was formed by the amalgamation of the gram panchayats of Hunasamaranahalli and Sonnappanahalli. Rapid urbanisation has resulted in many of the local residents giving up agriculture. The town is completely dependent on groundwater for its water supply. Borewell depths have reached more than 1000 feet (ranging from 350 to 1500 feet). There are 62 borewells, of which 20 are not yielding. Around 2500 kilolitres (KL) (2.5 million litres per day) of water is supplied to the town at 55 – 60 litres per person per day (lpcd). This is much less (around 50% deficit) than the standard of 135 lpcd (5.7 million litres per day) that the town should ideally be able to supply. This is one of the challenges faced by the new TMC that tapping into the shallow aquifer could help meet to some extent, instead of drilling more borewells in a region that historically depended on open wells for water.
The two lakes in the town, Hunasamaranahalli Lake and Kodagalahatti Lake, receive treated wastewater from the Hebbal-Nagawara Valley project, in which 210 million litres of Bengaluru’s treated domestic wastewater per day are pumped to 65 lakes in Chikkaballapur, Bengaluru Urban and Bengaluru Rural districts.
Biome Environmental Trust met the TMC through Mr Venkate Gowda, Headmaster of Sonnappanahalli Govt Higher Primary School. Our attempt is to try and help the town understand the shallow aquifer and integrate it into the town’s water supply in a sustainable, equitable and economically viable manner. The idea that open wells could be a significant source of water, and well revival and use could be a strategy to enhance the town’s water security was new, and needed proof of concept. With Mr Venkate Gowda’s help, Biome identified six wells that were rejuvenated between October 2022 and January 2023, with funding support from Puravanakara Ltd, Provident Housing Ltd and Starworth Infrastructure and Construction Ltd. Most of these wells were already being used by the local communities. Two of these wells have been integrated into the town’s municipal water supply. From January – October 2023, 30.7 million litres have been pumped from the Aviation College well. From April – October 2023, the Park View Apartments well has given 21.3 million litres of water. The volume of water pumped out daily is known because of the water meters installed on the outlet pipes. This is a very important step towards managing the shallow aquifer withdrawal that is a part of this project’s efforts and did not exist before, even on the wells that were being used earlier.
The Hunasamaranahalli TMC has expressed interest in exploring the possibility of replicating Biome’s Sihineer Kere open well – WTP project in Hunasamaranahalli, as treated wastewater comes to both the town’s lakes. Biome has started working in this direction. Through this first step of rejuvenating these six wells, Biome’s effort is to get the town to see the importance of the shallow aquifer, measure withdrawal from it, relate demand to it, look at production costs of water, and invest in recharge for water security.
Here is a map of the wells revived and the lakes in and near Hunasamaranahalli.
All the wells were cleaned and rejuvenated by well-digger Shankar, a long-time associate of Biome, and his team. The details of the wells revived are as follows:
|Well opp Academy of Aviation and Engg
|Dia 24 ft
Depth 65 ft
Stone lined, 70-80 years old
|Removal of vegetation and silt, application of lime, alum and potassium permanganate, installation of safety grill with 1” mesh
|Hunasamaranahalli TMC (Shaktinagar, Muneshwar Camp and Sonnappanahalli wards), Aviation Academy, Hotel Arna, Legend Hill View and Prabhavati Palm apartments through metered pipelines
|Well opp Park View apartments
|Dia 24.5 ft
Depth 74 ft, with 8 ft dia ‘pillubavi’ at the bottom 12 ft
Stone lined, 75 years old
|Removal of old grill, vegetation and silt, application of lime, alum and potassium permanganate, installation of new safety grill with 1” mesh and pump
|Hunasamaranahalli TMC to Vidyanagar Cross OHT through metered pipeline
|Well near Bettahalasur Cross
|Dia 15 ft
Depth 33 ft,
Stone lined, 50 years old
|Removal of old grill, solid waste, vegetation and silt, application of lime, alum and potassium permanganate, installation of new safety grill with 2 pulleys, reinforced the parapet
|Around 100 households manually draw 5-10 KL water daily (to prevent overdraft and wastage) for washing clothes and cleaning, supplementing the municipal water supply
|Well behind GHPS Sonnappanahalli
|Dia 8 ft
Depth 24.5 ft,
Stone lined, 70 years old
|Removal of silt, application of lime, alum and potassium permanganate, modification and painting of safety grill, installation of new pulley, and observation for seepage. Water quality test showed no contamination
|Minimal use by local residents. TMC plans to connect it to water supply system
|Well in Sonnappanahalli Village
|Dia 8.5 ft
Depth 30 ft,
Stone lined, 100 years old
|Removal of silt, application of lime, alum and potassium permanganate, installation of new safety grill and 2 new pulleys. Crack in wall repaired, surrounding area cleaned.
|Around 50 households manually draw 3-5 KL water daily (to prevent overdraft and wastage) for all uses including cooking, supplementing the municipal water supply
|Well in Kodagalahatti Village
|Dia 8.5 ft
Depth 30 ft,
Stone lined upto 20 ft – rock below that, 80 years old
|Removal of silt, application of lime, alum and potassium permanganate, modification of safety grill, and installation of new pulley. Repaired well wall and raised it by 1 foot.
|Used by local community for all non-potable uses and for cattle, supplementing the municipal water supply
The Hunasamaranahalli TMC showcased the details of this well rejuvenation project at the Municipalika 2023 Expo held from November 28 – 30, 2023, at Tripura Vasini, Palace Grounds, Bengaluru. The TMC also presented this project at the session on best practices.
Well opp Academy of Aviation and Engg
Well opp Park View apartments
Well near Bettahalasur Cross
Well behind Govt Higher Primary School, Sonnappanahalli
Well in Sonnappanahalli Village
Well in Kodagalahatti Village