P-swamy, rivers contribute to ground water but the majority of the share of ground water is not attributed to rivers. It comes from rainfall and accumulates ove rthe years.
So watertables of Tamilnadu is not because of Karnataka releasing Cauvery water!
Even if you argue against it and say watertables of Tamilnadu, you are killing your own argument.
As someone mentioned you guys have 17 years distress because you are uneducated and do not look at scientific facts.