This water discusion is going nowhere. Let us talk about Indian unity through Hindu perspective which is the reason India is still united. Not because of the jack word called "secularism" which was cleverly inserted into the framework of the constitution during Emergency in the 70's. What do Tamilians have to say about it? you guys still think yours is the only oldest language and you are the only dravidians(the term has no scientific basis and was used by Brits to divide and rule) living in India? or are you going to mend ways and upto uniting India in the right way. Remove the dravidian parties. Remember, India is still united because they practice an ancient culture which is diverse but similar in values. Once this is removed, each state of India will be alien to another. It will be Balkanization.