This is quite dated from 2004 on the Aliyar-Parambikulam situation.
from wiki http://en.wikipedia.org/wiki/Parambikulam_DamPer the agreement with Tamil Nadu, Kerala was supposed to receive 7.25 TMC feet of water per year from the Parambikulam Aliyar Project of which the Parambikulam Dam is a part. In 2004, Kerala did not receive any water after February 10, resulting in the drying up of paddy in thousands of acres in Chittur taluk.[3] Since this agreement has still not been met as of July 2006, Kerala Water Resources Minister has called for a review of the project agreement.[4]
Added later.
http://www.thehindu.com/news/states/ker ... 527110.ece
Among the issues are Tamil Nadu's claim of 2.5 thousand million cubic feet (tmcft.) from the Anamalayar river and Kerala's demand for the release of Aliyar water at the Manacadu weir over and above its present share of 7.25 tmcft.
15-km tunnel
Tamil Nadu is also proposing to build a 15-km-long tunnel connecting Nirar with Nallar as an alternative to the 49.2-km-long Contour Canal. As of now, Kerala has not responded to this proposal, says a senior official.
Formally signed on May 29, 1970, the PAP agreement took effect from November 9, 1958, as it was then that an understanding was reached between the States.
The pact also includes agreements between the two States on July 4, 1960, and May 10, 1969. It provides for a review after 30 years. The present review has been going on since 1988.
The agreement provides for sharing of waters of rivers such as the Anamalayar, Nirar, Sholayar, Parambikulam and Aliyar and its tributary Palar [which has nothing to do with the Palar river, which runs through Karnataka, Andhra Pradesh and Tamil Nadu] for generation of hydro-electric power, irrigation, drinking water supply and industrial use in the two States.