Gaganachukki is a falls located in kaveri river . likewise jog falls is located in sharavati river and therefore the answer is sharavati river

Gaganchukki : Kaveri river :: Jog Falls :
Gaganchukki and Jog Falls are both significant waterfalls in India, but they are associated with different rivers. Let's explore the similarities and differences between these two natural wonders.

Gaganchukki and Kaveri river
- Gaganchukki is one of the two main waterfalls formed by the Kaveri river.
- It is located in the state of Karnataka and is a popular tourist destination.
- The Kaveri river is one of the major rivers in southern India, originating in the Western Ghats and flowing through Karnataka and Tamil Nadu.
- Gaganchukki is known for its picturesque beauty and the surrounding lush greenery.

Jog Falls
- Jog Falls is located in the state of Karnataka as well, but it is formed by the Sharavathi river.
- It is one of the highest waterfalls in India and is a major tourist attraction.
- The Sharavathi river flows through the Western Ghats before plunging down to form the majestic Jog Falls.
- Jog Falls is known for its grandeur and the breathtaking view it offers to visitors.

Comparison
- Both Gaganchukki and Jog Falls are located in Karnataka and are popular tourist spots.
- While Gaganchukki is associated with the Kaveri river, Jog Falls is formed by the Sharavathi river.
- Both waterfalls showcase the natural beauty of the Western Ghats region and attract visitors from far and wide.
In conclusion, Gaganchukki and Jog Falls are two distinct waterfalls in Karnataka, each with its own unique charm and connection to a different river. Visitors can enjoy the beauty of these natural wonders and appreciate the diversity of nature in India.