Bhavanisagar Dam is the largest earthern dam in Tamil Nadu having 8 km long earthen bund. Sathyamangalam Tiger Reserve is the catchment area for Bhavanisagar dam. Bhavani and Moyar rivers flow into the Sathyamangalam Tiger Reserve to culminate in Bhavanisagar dam. It is the source of water for irrigation and drinking water facilities in Erode District.
