Chennai

New checkdam to help divert water to Chennai

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Kosasthalaiyar river in Tiruvallur district will soon have one more checkdam built across it to divert surplus water to a chain of water bodies that includes those that feed Poondi reservoir, a key storage point for Chennai’s water needs.

The Water Resources Department has recently started work to build a checkdam, which will stop water from draining into sea, near Pattaraiperumbudur of Tiruvallur district and also construct a concrete channel to divert water to various water bodies.

This initiative will mean after nearly half a century, a tank belonging to the ancient Veeraraghava Perumal temple, Tiruvallur district, may be brimming with water. What more, the neighbourhood will enjoy a better groundwater source too.

The floodwater will also be diverted to tanks enroute in Karikalavakkam, Pandur and Pattaraiperumbudur to enhance surface and groundwater availability in the localities.

Officials of the WRD said the temple tank was last noticed to have had water to its full capacity in late 1960s. The temple tank is among the chain of water bodies and catchment areas from where Poondi reservoir, which supplies drinking water to Chennai, receives its inflow.

Following representation from temple authorities and residents, the WRD had sought to store water with the recommendations of IIT Madras. “We plan to spread two layers of clayey soil over the tank bed to prevent percolation of the entire volume of water. With this, the tank will be able to hold nearly 12 crore litres of water and also help groundwater recharge. We expect ground water to be available at a depth of 10 feet compared to 30 feet now,” said an official.

Nearly 75,000 people residing in over 15 villages, including Arungulam and Kalianur, will enjoy better groundwater once the Rs.25 crore project is completed in six months. The Kosasthalaiyar river has over six check dams built in various places to recharge groundwater.

The department is awaiting permission to build the concrete channel for a distance of nearly 12 km along Chennai-Tiruttani Highway and link excess water ultimately with the temple tank.

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Printable version | Jan 28, 2020 12:28:49 AM | https://www.thehindu.com/news/cities/chennai/new-checkdam-to-help-divert-water-to-chennai/article7627067.ece

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