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|- location||Karnataka, India|
|- location||Bay of Bengal, India & India|
|- elevation||0 m (0 ft)|
|Length||400 km (249 mi)|
|Discharge||for Tirukoilur Anicut|
|- average||20.4 m3/s (720 cu ft/s) |
The Ponnaiyar is a river in southern India. It rises on the hill of Nandidurg in Chikkaballapur District of Karnataka state, and flows south and then east for 400 km (250 mi) through Karnataka and Tamil Nadu, emptying into the Bay of Bengal at Cuddalore. Tirukkovilur is the largest city in the path of Ponnaiyar River.
The river originates in the Nandi Hills in the Chikkaballapur district of Karnataka and flows through Tamil Nadu before entering into the Bay of Bengal. It has a catchment area of 1,424 mi2. Kelavarapalli dam is built across this river near Hosur. The Krishnagiri dam and Sathanur Dam are also built across this river. Moongilthuraipattu Sugar Factory (KCSM) is situated on the bank of river.
The river is dry for the most part of the year. Water flows during the monsoon season when it is fed by the southwest monsoon in catchment area and the northeast monsoon in Tamil Nadu. However this water flow raises the water table throughout the river basin and feeds numerous reservoirs/tanks. Some of the Bangalore's sewage mixes with this river via varthur lake and other channels.
The sand build of the river is quite impressive, suggesting that it may have been a perennial river with much larger water flow in the past. Mention of the river is found in Sangam & Medieval (Thevaram - Bhakti cult era) literature, where it is depicted as rich with lush vegetation on its banks. There are various temples on its banks.It ends in Bay of Bengal at Cuddalore District
This river is now looted for its rich availability of sand. As the water flow will be only in monsoon seasons, river is dry in remaining parts of the year.
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