The 136 km long river originates near Kaveripakkam in Vellore District and has catchment area in North Arcot District, has a branch near Kesavaram Anicut and flows to the city as Cooum River and the main Kosasthalaiyar river flows to Poondi reservoir.
The 136 km-long river originates near Kaveripakkam in Vellore District and drains into the Bay of Bengal. It has catchment area in North Arcot District with a branch near Kesavaram Anicut and flows to the city as Cooum River and the main Kosasthalaiyar River flows to Poondi reservoir.