Madam, your arguement relied on the number three. Hence the clarification. Cauvery is not just in three districts of KN. It is in 8 districts out of 31 districts which is almost 25% of KN distritcs. Existence of other rivers no way minimizes its dependence on Cauvery. Other rivers will have to feed their own basin districts. Probably, you will appreciate KN's compulsion if you know that it is the second most arid state after Rajasthan. You might verify these facts yourself.