The top court did not agree with the findings in 2007 award of Cauvery Water Dispute Tribunal (CWDT) and said it had drastically reduced the share of Karnataka towards domestic and industrial purpose on the ground that only one-third of the city of Bengaluru fell within the river basin and also on the presumption that 50 per cent of the drinking water requirement would be met from ground water supply.
With the today's verdict, the apex court raised Karnataka's current share of 270 tmcft Cauvery water by another 14.75 tmcft, including 4.75 tmcft water for drinking and domestic requirement of Bengaluru residents and 10 tmcft on account of availability of ground water in Tamil Nadu.
The bench said that territorial or geographical demarcation for extension of beneficial uses of an inter-state river basin cannot always be strictly construed.
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"We are disposed to think (that) for the city of Bengaluru, as an evident phenomenon, has burgeoned over the years and has grown today into a progressively sophisticated, sprawling, vibrant and a much aspired seat of intellectual excellence particularly in information technology and commercial flourish.
"It has transformed into a nerve centre of contemporaneous significance and its population is daily on the rise, thus, registering an ever enhancing demand for all civic amenities," the bench, also comprising Justice Amitava Roy and A M Khanwilkar, said.
The bench said it cannot approve the tribunal's approach and opined that the allocation of water for drinking and domestic purposes for the entire city of Bengaluru has to be accounted for.
It rejected the tribunal's assumption that 50 per cent of the drinking water requirement would be met from ground water, the bench said 33 tmc would be a safe and acceptable figure qua drinking and domestic water requirement of the State of Karnataka for its urban and rural population.
Karnataka government had contended that while quantifying the allocation of water for domestic purposes, the tribunal had accounted for only one-third of the city of Bengaluru to be falling within the river basin and drastically cut down its overall share under this head.
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