what is the reason for cauvery water dispute

The Cauvery water dispute is a long-standing conflict between the Indian states of Tamil Nadu and Karnataka over the sharing of waters of the Cauvery River. The dispute dates back to the colonial era when the British government established agreements to allocate the rivers waters among the princely states of Mysore and Madras presidency (now Karnataka and Tamil Nadu, respectively) . The genesis of this conflict rests in two agreements in 1892 and 1924 that provided that Tamil Nadu would receive 75% of the water, Karnataka, 23%, and Kerala, the rest. The sharing of waters of the Cauvery River has been the source of a serious conflict between the two Indian states of Tamil Nadu and Karnataka. The 1924 agreement played a pivotal role in bringing the stretch of the Cauvery River between the Krishna Raja Sagar Dam and the Mettur Dam to the forefront of the Cauvery water dispute. The dispute has its roots in historical agreements and differing demands. The Cauvery River, often referred to as the "Ganges of the South," is a vital water resource for the southern states. Its waters are used primarily for irrigation, providing sustenance to millions of farmers. The dispute became a hot issue again in 2012 when the Karnataka government failed to comply with then Prime Minister Manmohan Singhs directive to release 9,000 cusecs (cubic foot per second) of water to Tamil Nadu. The Indian Government constituted the Cauvery Water Disputes Tribunal (CWDT) on June 2, 1990, to adjudicate the water dispute between the states of Tamil Nadu, Karnataka, Kerala, and Puducherry with respect to the inter-state Cauvery water and river basin.