Kallanai (also known as the Grand Anicut) is an ancient dam, which is built (in running water) across the Kaveri river in Tiruchirappalli District in the state of Tamil Nadu in India.
Located at a distance of 15 km from Tiruchirappalli, the dam was originally constructed by the Chola king Karikalan in c. 100 BC – c. 100 AD.
The dam has been built with uneven stones and is 329 m long and 20 m wide. It was constructed with the idea to divert water across the delta region for irrigation.
The main purpose of the Kallanai dam was to divert the waters of the Kaveri across the fertile delta region for irrigation via canals. The dam splits the river Kaveri into 4 streams known as Kollidam Aru, Kaveri, Vennaru and Puthu Aru.
It is the fourth-oldest water-diversion or water-regulator structures in the world and the oldest in India which is still in use.
Located at a distance of 15 km from Tiruchirappalli, the dam was originally constructed by the Chola king Karikalan in c. 100 BC – c. 100 AD.
The dam has been built with uneven stones and is 329 m long and 20 m wide. It was constructed with the idea to divert water across the delta region for irrigation.
The main purpose of the Kallanai dam was to divert the waters of the Kaveri across the fertile delta region for irrigation via canals. The dam splits the river Kaveri into 4 streams known as Kollidam Aru, Kaveri, Vennaru and Puthu Aru.
It is the fourth-oldest water-diversion or water-regulator structures in the world and the oldest in India which is still in use.
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