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More check dams planned to augment city’s water supply




More storage structures come up across rivers both upstream and downstream of Poondi reservoir. This as the Water Resources Department embarks on an ambitious programme to augment the city’s drinking water supply.

Shutters of the Poondi reservoir opened for nearly a month since November 27 last year. This due to heavy inflow from and also because of steady supply of Krishna water from Andhra Pradesh. Storage structures being planned to retain flow in the rivers and to save resources.

Work to build a check dam at Illupur, about 10 km upstream of Poondi reservoir, started on Saturday at a cost of ₹17.6 crore. The 230-m-long check dam comes up across Nagari river, near Tiruttani, in about a year.

Officials said the 2-m-tall check dam helps store about 70 mcft of water . Similarly to recharge groundwater in a 3-km-radius, besides irrigating 296 hectares of land in the region.

Once the three check dams built upstream of Poondi reservoir, a minimum of 200 mcft of water saved, besides recharging the water table.

The department plans to build a barrage near Karanodai bridge as no other storage structure for nearly 15 km after Thiruka- ndalam across the Kosasthalaiyar.

It helps store an additional 600 mcft of water that otherwise flows into the sea, the official added.

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