Published on: July 24, 2021
OVERUSE OF GROUND WATER
What is in news : Study by Department of Water Resources (DOWR), Government of India has shown groundwater is overexploited in Bengaluru Urban district
- In 36% of the district, coming under city limits, water quality issues abound owing to pollution, apart from poor recharge.
- In the remaining 56%, the overexploitation is owing to the complete dependency on groundwater and unmindful drilling of borewells.
- Apart from the demand and supply gap, urbanisation hindering recharge of ground water, the other issues were leakage of pipes and mining/theft/ pollution of groundwater
- In peripheral areas, the problems were pertaining to the increase and deepening of borewells and drying up of the Arkavathy, the Kumudvathi, and the Hesaraghatta reservoir.
Recommendations to tackle the issue :
- Dual piping for potable and non-potable water
- Reuse of grey water
- Adopting scientific augmentation of groundwater recharge
- Reduction of unaccounted for water to less than 20%, and other measures in line with order of the National Green Tribunal to prevent pollution of waterbodies
- Extending the Cauvery water supply to peripheral areas
- Using grey water for irrigation
- Involving citizens’ groups and local communities in rejuvenation of rivers and waterbodies
What has been done :
- Safeguarding waterbodies and restoring the original drain network by clearing encroachments
- Preventing sewage and effluents from entering the drains and water bodies
- Filling up tanks and lakes with treated water
Way forward :
- Apart from regulating permissions for drilling borewells, the authority should also ensure the borewells are metered
- Every borewell must have a recharge structure