In Thanjavur district, the police arrested several farmers who were protesting on the rail tracks.
In the state capital Chennai, DMK leader M.K. Stalin led the party’s protest at Perambur.
Similarly, members of the DMK, Congress and MDMK were arrested while they protested at different parts of the state.
Tamil Nadu and Karnataka are at war for long over the sharing of Cauvery river waters.
On October 3, the Ministry of Water Resources filed an Interlocutory Application in the Supreme Court seeking modification of its September 30 order to constitute the CMB by October 4.
The Ministry in its application said the CMB cannot be constituted now.