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Kosasthalaiyar River

Kosasthalaiyar River, also known as Kortalaiyar, is one of the three rivers that flow in the Chennai metropolitan area. The Script error: No such module "convert". river originates near Kaveripakkam in Vellore District and drains into the Bay of Bengal. It has catchment area in North Arcot District with a branch near Kesavaram Anicut and flows to the city as Cooum River and the main Kosasthalaiyar River flows to Poondi reservoir. From Poondi reservoir, the river flows through Thiruvallur District, enters the Chennai metropolitan area, and joins the sea at Ennore creek. There are two check dams across the river at Tamaraipakkam and Vallur.[1] The excess discharge in the river is controlled by the Tamarapakkam Anicut located across the river in the downstream of Poondi reservoir. Vallur Anicut is a small check dam constructed near Minjur across the river to control water levels and feed irrigation channels in the area. It flows to a distance of Script error: No such module "convert". in the Chennai metropolitan area. The total catchment area of the river is Script error: No such module "convert"., and the bed width ranges from Script error: No such module "convert".. The discharge capacity of the river is Script error: No such module "convert"., and the anticipated flood discharge capacity is about Script error: No such module "convert"..[2]

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.

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.[3] The department also proposes to construct groynes to reduce formation of sand bars near the mouth the river.[4]

In May 2012, the Water Resources Department (WRD) planned to construct a check dam across the river near Bandikavanur village in Tiruvallur district, about Script error: No such module "convert". from Chennai, at a cost of 300 million. The Bandikavanur check dam, to be constructed about Script error: No such module "convert". upstream of the Karanodai bridge on Chennai–Kolkata National Highway, would be constructed at a height of Script error: No such module "convert". across the nearly Script error: No such module "convert". wide river. The check dam would recharge the water table at a radius of Script error: No such module "convert"..[1][5]

See also

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References

  1. ^ a b "Check dam to meet city's needs". The Hindu (Chennai: The Hindu). 26 April 2012. Retrieved 18 May 2012. 
  2. ^ Session-3 River and Drainage System in CMA
  3. ^ Lakshmi, K. (10 November 2011). "Life set to flow back to 200 lakes". The Hindu (Chennai: The Hindu). Retrieved 13 Nov 2011. 
  4. ^ Lakshmi, K. (3 December 2011). "WRD plans groynes". The Hindu (Chennai: The Hindu). Retrieved 4 Dec 2011. 
  5. ^ Lakshmi, K. (16 January 2013). "One check dam to save many litres of water". The Hindu (Chennai: The Hindu). Retrieved 18 Jan 2013. 

Coordinates: 13°12′46″N 80°16′37″E / 13.212822°N 80.27696°E / 13.212822; 80.27696{{#coordinates:13.212822|80.27696||||||| |primary |name= }}