It seems the author is quite biased in his opinion. Cauvery flows through almost 7 districts of tamilnadu whereas it flows only thro' 4 districts of karnataka. The author has pointed out that the cauvery basin in Tamilnadu has good amount of ground water. It is true only with the 3 districts coming under cauvery delta region whereas the other districts are mostly drought prone and has very less ground water availability ex.Dharmapuri district.