Kosasthalaiyar River
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Kosasthalaiyar River, also known as Kortalaiyar, is one of the three rivers that flow in the
The river and its course
Kosasthalaiyar is 136-kilometre (85 mi) long and originates near
Every year, whenever the floodgates of Poondi reservoir are opened, a considerable volume of water gets drained into the sea through the Kosasthalaiyar River near the Ennore Creek.
Work on 10th check dam across the river is expected to by completed by the end of 2018 at a cost of ₹ 70 million. The structure would be 1.5 meters high, built across the 100-meter wide river. It would store water in the river for over 2 kilometers.[5]
Channels
The historic Korattur anicut located at Jamin Korattur in Tiruvallur district serves as a vital channel to regulating water to the Chembarambakkam reservoir. The dam was built in 1876 across the unpolluted stretch of the Cooum river and diverts excess water to the Chembarambakkam reservoir.[6]
Restoration
In 2011, the Water Resources Department (WRD) initiated the tendering process under the Irrigated Agriculture Modernisation and Waterbodies Restoration and Management (IAMWARM) project to rejuvenate nearly 200 lakes falling under Kosasthalaiyar river sub-basin.[7] The department also proposes to construct groynes to reduce formation of sand bars near the mouth the river.[8]
In May 2012, the Water Resources Department (WRD) planned to construct a check dam across the river near Bandikavanur village in Tiruvallur district, about 30 kilometres (19 mi) from Chennai, at a cost of ₹ 300 million. The Bandikavanur check dam, to be constructed about 500 metres (1,600 ft) upstream of the Karanodai bridge on Chennai–Kolkata National Highway, would be constructed at a height of 6.3 metres (21 ft) across the nearly 300-metre (980 ft) wide river. The check dam would recharge the water table at a radius of 10 kilometres (6 mi).[1][9]
In 2018, two more check-dams were planned across the river. One of them will be located between Pudhukuppam and Kudiraipallam, downstream of Karanodai bridge. The dam will be built to a height of 1.2 meters across the river and the width will be nearly 335 meters, at a cost of ₹ 99 million. This will be the eighth check-dam built across the river. Another one will be built in Bandikavanur, about 30 km from Chennai. This will help recharge groundwater in a radius of 10 km.[6]
See also
- Cooum river
- Adyar river
- Water management in Chennai
References
- ^ a b "Check dam to meet city's needs". The Hindu. Chennai: The Hindu. 26 April 2012. Retrieved 18 May 2012.
- ISSN 0971-751X. Retrieved 12 August 2019.
- ^ Kanthimathinathan, T. "Session-3 River and Drainage System in CMA" (PDF). Cooum Sub Basin Restoration & Management. Retrieved 14 August 2016.
- ^ "Work begins to deepen, desilt Ennore creek". The Hindu. Chennai: Kasturi & Sons. 13 October 2018. Retrieved 15 October 2018.
- ^ Lakshmi, K. (5 January 2018). "Work on 10th check dam across Kosasthalaiyar after Pongal". The Hindu. Chennai: Kasturi & Sons. Retrieved 7 January 2018.
- ^ a b "Two more check-dams coming up soon across Kosasthalaiyar river". The Hindu. Chennai: The Hindu. 17 June 2018. Retrieved 28 July 2018.
- ^ Lakshmi, K. (10 November 2011). "Life set to flow back to 200 lakes". The Hindu. Chennai: The Hindu. Retrieved 13 November 2011.
- ^ Lakshmi, K. (3 December 2011). "WRD plans groynes". The Hindu. Chennai: The Hindu. Retrieved 4 December 2011.
- ^ Lakshmi, K. (16 January 2013). "One check dam to save many litres of water". The Hindu. Chennai: The Hindu. Retrieved 18 January 2013.