Residents to fund STP to save lake

Calling for collective efforts to conserve water, former NASA scientist Dr Ashwin Mahesh on Thursday sought the support of the State government to fund the creation of ‘Matthondu (another) Cauvery’.

This, he said, is a realistic attempt towards making use of  lake and rainwater instead of depending on River Cauvery.

In his speech at the annual water conference - ‘Industry-Government-Community Partnerships for Sustainable Water Management’, - Mahesh asked the government to allot Rs 150 crore in the next budget towards this.

Elaborating on ‘Matthondu Cauvery scheme,’ he said the City itself can create another Cauvery. About 700 MLD of water could be used by improving just six lakes. Conserving 150 to 200 MLD of water is possible if 50 per cent of the City’s buildings instal rainwater harvesting facility. Adopting dual piping in industrial areas and in all future buildings would save 30 MLD. Behaviour modification and pricing reforms can save 200 MLD in 10 years, groundwater recharge can provide 500 MLD in 15 years and treated waste water 1,000 MLD in five years, he said.

Therefore, about 2,000 acres of lakes need to be used to serve the entire 8 million people, who will be added to the region in the next 20 years, he said. If rainwater harvesting facility and dual piping system would conserve 300 MLD of water, recharge of groundwater would save 20 MLD, he said and favoured treating waste water. All this would add up to 1,500 MLD, which would make the City self-sufficient in terms of water, he said.

For this, Mahesh asked the government to announce a comprehensive programme focused on all six aspects.

Minister for Bengaluru Development K J George sought the support of industries in conserving water. BWSSB chairman T M Vijay Bhaskar asked industries to use tertiary water. Jorn Rohde, the German Consul General, Bengaluru, said people in Germany started using tertiary water to wash car, after government increased water tariff. Only strict enforcement would help, he said.

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