Why continuous rain failed to raise groundwater level in Bengaluru


Deep, under the surface of the city, however, a different narrative is playing out. Surprisingly, despite the record-setting rains last year, the city’s ground water levels have significantly worsened compared to last year. Experts have attributed this to borewell exploitation, concreting landscape, and erratic intensity of the rains.

An analysis of groundwater levels between October 2016 and October 2017 — which is the latest available data for Bengaluru Urban district — shows that levels in all four taluks have significantly reduced between 2 to 9 metres in the past year, indicates data obtained from the District Groundwater Authority. Even more disconcerting is that despite over 1,200 mm received during monsoons in 2017 or, more than double of what was received in monsoons of 2016, water levels do not seem to have risen appreciably.

Between May and October this year, the 24 observation wells spread across Anekal, Bengaluru East, North and South taluks have gone up between 3% to 6%. However, in 2016, the rise was more than 27% in Bengaluru North and East, while it dipped in Anekal taluk.

 

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