Water - Water - Water - Let us stop and think a moment.

Almost every year Tamilnadu and Karnataka fight for Cauvery Water.
If there is surplus water Karnataka has no other go but to release water to Tamilnadu as otherwise cities in Karnataka will be submerged in water.
At times the ever growing Bengaluru itself will not even have any drinking water.
I once saw the Krishnaraja Sagar Dam completely bone dry and then how can Karnataka release water to Tamilnadu ?
There is another suggestion.
Both the rivers Gothavari with perennial flow of water and Krishna are in Andhra Pradesh only.
Gothavari often floods and damages number of villages causing huge losses of life and resources.
If we connect Govathavari and Krishna then the surplus water in Gothavari will flow into river Krishna and Krishna river will be full of water throughout the year.
Now the canal connecting Krishna river and Chennai in Tamilnadu runs through dry stretches of Andhra Pradesh.
If surplus water flowing from Gothavari into Krishna is diverted to Chennai through this canal it will help irrigation en route in the dry Andhra Pradesh villages and reach Chennai providing much needed drinking water to Chennai all the 365 days.
Now this surplus water after satisfying the needs of the Chennai Population can be used otherwise also.
Ms.Jayalalitha the present Chief Minister of Tamilnadu has laid pipes from Veeranam Lake to Chennai successfully.
These pipes can be used in the reverse direction to take Gothavari - Krishna water that reached Chennai to Veeranam lake by pumping the opposite way.
Then Gothavari would have reached Veeranam Lake.
Already Veeranam Lake is connected to Cauvery with the help of Raja Canal.
The otherwise usually empty Veeranam Lake which is also bone dry during the Summer will also receive the much needed and available Gothavari water from Chennai.
The surplus in Veeranam Lake can be diverted through Raja Canal into Cauvery River so that it can flow to the fertile Tanjore fields providing the life to grow Paddy and other agricultural products always.

Gothavari - Krishna - Chennai - Veeranam Lake - Cauvery - Tanjore Fields

Gothavari Krishna link to be provided by Andhra Pradesh Government as both the rivers are in the same State with necessary aid from the Central Government and the Government of Tamilnadu, the beneficiary.
Krishna Chennai canal is already there.
Water can be drawn from this canal to serve en route villages in Andhra Pradesh also.
From Chennai to Veeranam the water can be pumped through the existing pipe lines in the opposite direction.
Veeranam will feed the Cauvery River through the Raja Canal in the opposite direction.
Gothavari water will reach the fertile Tanjore fields for Agricultural operations.

Mother Gothavari has the potential to meet all the above demands and flooding of river Gothavari will be past history.

Think it over. All the Best.