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The river Arasalar (Tamil: அரசலாறு) is a branch of Cauvery which split into 5 different rivers when it enters into Tanjore District from Trichy. Exactly in the place near to Pullambadi where the River Cauvery been stopped by Lower Anaicut and from Tiruvaiyaru (separation of 5 rivers) this Arasalar separates from River Cauvery.
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