The Kollidam (also Kolidam and sometimes Coleroon in English) is a river in southeastern India. The Kollidam is the northern distributary of the Kaveri River as it flows through the Delta of Thanjavur. It splits from the main branch of the Kaveri River at the island of Srirangam and flows eastward (Near By Ayangudi,Muttam ) into the Bay of Bengal.