Gadananathi (கடனாநதி)also can be called as Gadananadhi or Gatananadhi or Kadananathi or Kadananadhi is a river flowing in the Tirunelveli district of the Indian state of Tamil Nadu.

[citation needed] The Gadananathi is fed by the Jambunathi and Ramanathi Rivers.

The Gadananadhi has 6 anicuts and a reservoir of 9,970,000 cubic metres (8,080 acre·ft), and irrigates 38.87 square kilometres (15.01 sq mi) of wetlands.

[citation needed] Gadana Nathi Reservoir, also spelt as Kadana Nathi Dam is located at the foot of the western Ghats in Sivasailm village near Alwarkurichi which is one of the important tourist places of Tenkasi district.

[citation needed] [1] Archived 18 February 2014 at the Wayback Machine List of rivers of Tamil Nadu