 It is situated south of Chennai, east of Tiruchirappalli, and about north-east of Thanjavur.It lies in the region called the "Old delta" which comprises the north-western taluks of Thanjavur district that have been naturally irrigated by the waters of the Cauvery and its tributaries for centuries in contrast to the "New Delta" comprising the southern taluks that were brought under irrigation by the construction of the Grand Anicut canal and the Vadavar canal in 1934.It has an average elevation of 26 metres (85 ft).