Reservoir in Sea to End Bengaluru, India’s Drinking Water Problems?

[I was thinking that it should be possible to create a reservoir off shore, let rain fill it, and use the fresh water on shore. To the (tiny) extent that it would lower sea levels, Greens should support it. Sure enough, it’s being done (to some extent) already. -Bob]

Re-Blogged From The Times of India

BENGALURU: Could a reservoir in the Arabian Sea be the one-stop solution to harness flood waters of the Nethravathi river and end the drinking water scarcity in Bengaluru and Mangaluru? Following a report from researchers at the Indian Institute of Science (IISc), Bengaluru development minister K J George has instructed the city water board to look into the possibility of implementing the proposal.

T G Sitharam, senior professor at the department of civil engineering at IISc said the proposal to bring water from the west-flowing river was a sustainable water resource development strategy for Mangaluru and Bengaluru. He made a presentation of the feasibility study before George. The meeting was also attended by officials of the Bangalore Water Supply and Sewerage Board (BWSSB).

“Hundreds of thousand million cubic feet (tmc ft) of flood water joins the Arabian Sea from the Nethravathi alone every year. We have proposed to build a coastal reservoir with a storage capacity of 20 to 30 tmc ft of water so that it can be pumped to the cities of Bengaluru and Mangaluru. Since the reservoir will be built three to four kilometres into the sea, there will be no question of tree cutting, human displacement or other ecological worries. Also, there will be no diversion of the river course as we will be tapping the water when it reaches the sea. Barriers will ensure that saline sea water doesn’t get mixed with the fresh river water,” he explained.

  Asked about the costs involved in pumping the water to Bengaluru over a distance of more than 350km, Sitharam said the BWSSB was shelling out a huge amount for getting Cauvery water across 130-odd kilometres. “They already know the technology. To bring water from the coastal reservoir, they just need to scale it up,” he added.
It”s already done in Japan and many European nations. It could be done for other rivet basins like Narmada, Krishna, Cauvery and many other rivers. It”s need of the hour as India population is expe… Read MoreHarry Das

Sitharam said coastal reservoirs were effectively constructed in more than 10 countries, including Singapore, Hong Kong and Japan. “In Shanghai, 50 million people are getting drinking water by the same method. Hong Kong has built three such reservoirs,” he said.

CONTINUE READING –>

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