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20-Kallanai- The Stone That Guided the Kaveri

Good morning friends. Today let us travel south, to the banks of the Kaveri river — and to a story that has quietly shaped Indian history for nearly two thousand years. In the 2nd century CE, the Chola king Karikala built a massive stone structure across the Kaveri. It is known today as the Grand Anicut, or Kallanai. What makes it remarkable is not just its age, but its purpose. It was not built to stop the river, but to guide it. The Kaveri, generous yet unpredictable, would flood the plains of Tamilakam. Instead of fighting the river, Karikala chose to work with it. The stone barrage gently diverted water into canals, spreading irrigation across farmlands. Rice cultivation flourished. Villages prospered. The delta region became one of the most fertile areas in South India. What is even more remarkable is that Kallanai still stands today, still serving its purpose. Modern engineers have studied it, admired it, and strengthened it — but the core structure remains ancient. The story of the Kaveri here is not about conquest or war. It is about understanding a river’s rhythm. The Cholas did not try to overpower the Kaveri. They learned her flow and built alongside it. And perhaps that is why, centuries later, the river still remembers.


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Written by Shantanu 2026-02-20
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