The Arkavati is an important mountain river in Karnataka, India, originating at Nandi Hills of Chikkaballapura district. It is a tributary of the Kaveri, which it joins at 34 km south of Kanakapura, Ramanagara District called Sangama in Kannada, after flowing through Ramanagara and Kanakapura. The river drains into the Chikkarayappanahalli Lake near Kanivenarayanapura. Kumudavathi and Vrishabhavathi rivers are tributaries to this river. It forms Chunchi falls near Haroshivanahalli. It joins Cauvery river as a tributary near Mekedatu.

The South Pennar River is a river in India. Bangalore, Hosur, Krishnagiri,Kaveripattinam, and Cuddalore are the important cities on the banks of South Pennar river. This is the second longest river in Tamil Nadu, with a length of 497 km, after the Kaveri. Chandapura, Anekal, Hosur, Bagalur, and Chengam are the major industrial settlements on its banks. The river is severely polluted by industrial waste as it flows through major industrial areas in the eastern suburbs of Bangalore, Industrial parks of Hosur and Chengam.