Karnataka has one rain season from the Southwest Monsoon whereas TN has two - one from Northeast and other from Southwest monsoon. (http://www. tn.gov.in/ crop/rainfall. htm) Despite the two monsoons, why has TN not invested in building dams to store water in the Kaveri basin within its territory? Simple it needs money to be invested and also lands will be submerged within its area. So its better that Karnataka and Kerala build the dams with their money and lose their lands to provide water to TN.
