Palar is a river of southern India. It rises in Nandi Hills, India in Kolar district of Karnataka state, and flows 93 km in Karnataka, 33 km in Andhra Pradesh and 222 km in Tamil Nadu before its confluence into the Bay of Bengal at Vayalur about 100 km south of Chennai. It flows as a Guptagamini (underground course) for a long distance only to emerge near Bethamangala town, from where, gathering water and speed, it flows eastward down the Deccan Plateau. The cities of Ramanaickenpet, Vaniyambadi, Ambur, Vellore, Melvisharam, Arcot, Walajapet (Anaicut), Kanchipuram, and Chingleput are located on banks of Palar River. Of all the total of seven tributaries, the chief tributary is Cheyyar River.
Source of Palar at Nandi Hills
The mouth of the Palar river, seen from the air
 Controversial Dam
Andhra Pradesh Government is constructing an irrigation dam across Palar at Ganeshpuram, near Kuppam, Andhra Pradesh which has caused agitation among the people of the five northern districts of Tamil Nadu, namely Vellore, Kancheepuram, Tiruvannamalai, Thiruvallur and Chennai benefited by the river. Tamil Nadu Chief Minister Jayalalitha voiced her opposition to this proposal and said "Palar is an inter-state river and was also one of the rivers mentioned in Schedule A annexed to the 1892 agreement which is in force as per Interstate River Water Disputes Act 1956 . As per a clause of the agreement, the upstream state should not build any new dam or any structure to obstruct, divert, or store waters of the rivers without the consent of the downstream state".
The average rainfall in entire Palar river basin is low. This river basin used to suffer from frequent droughts. However, Karnataka and Tamil Nadu have mitigated frequent recurrence of droughts by developing innumerable minor and medium irrigation tanks. This has improved the availability of water for surface as well as ground water irrigations. As per the wet land atlas of India., the manmade wet lands are covering extensive area (3% to 5%) in the districts of Karnataka and Tamil Nadu covering Palar river basin. Whereas the Palar basin in Andhra Pradesh is not well covered by wet lands which implies that the river water usage in Andhra Pradesh is not up to the mark compared to Karnataka and Tamil Nadu. In the year 1892 when the Palar waters agreement was made, Tamil Nadu and Andhra Pradesh were part of then Madras Presidency. The 1892 agreement on Palar river water sharing is presently applicable between Karnataka and Andhra Pradesh since the boundary line in Palar river basin between Madras Presidency and Mysore kingdom is presently part of Karnataka and Andhra Pradesh states.
A documentary called "En Peyar Palar" produced by Social Action Movement and Water Rights Protection Group, Chengalpattu and released on 30 June 2008 chronicles the plight of the river from its origin in Karnataka till it joins Bay of Bengal. The 85 minute documentary delves into how activities such as sand quarrying and discharge of industrial effluents are sucking the life out of one of Tamil Nadu’s prime sources of drinking water. It was directed by R.R. Srinivasan.
This River is so important for irrigation in the north and south Arcot districts of Tamil Nadu, but it flows a meager of 50 km in Andhra Pradesh, the Palar river had been seen dry for almost 20 years. Palar has been home for mud robbery and other illegal activities.
 See also
- ^ Palar river
- ^ Dam across the Palar is not feasible: State officials
- ^ 1892 Agreement - pages 279 to 293
- ^ TN against AP making dam on Palar river
- ^ "Ponnala defends dam across Palar". The Hindu. 26 September 2010. Retrieved 21 may 2011.
- ^ Wet lands of India 2011
- ^ A documentary charts the plight of Palar
 External links
Coordinates: 12°28′04″N 80°09′16″E / 12.46778°N 80.15444°E