From UPSC perspective, the following things are important :
Prelims level : Kalasa-Banduri Nala Project
Mains level : Mahadayei Water Dispute
The cost of Kalasa-Banduri Nala Project on the Mahadayi River skyrockets by 1,674% since inception. It rose from about ₹94 crores (2000) to ₹1,677.30 crores (2020) due to the ongoing inter-State river water dispute.
Kalasa-Banduri Nala Project
- The project is undertaken by the Government of Karnataka to improve drinking water supply to the three districts of Belagavi, Dharwad, and Gadag.
- It was planned in 1989; Goa raised an objection to it.
- It involves building across Kalasa and Banduri, two tributaries of the Mahadayi river to divert water to the Malaprabha, a tributary of Krishna River.
- Malaprabha river supplies the drinking water to Dharwad, Belgaum, and Gadag districts.
About Mahadayi Water Dispute
- The Mahadayi river basin drains an area of 2032 square kilometres of which 375 square km lies in Karnataka, 77 sq km in Maharashtra and the remaining in Goa.
- It originates in the Belagavi district of Karnataka, briefly passes through Maharashtra and flows through Goa (where its known as Mandovi), and drains to the Arabian Sea.
- Since the eighties, Karnataka has been was contemplating linking of Mahadayi with Malaprabha river, a tributary of Krishna.
- In 2002, Karnataka gave the idea a shape in the form of the Kalasa-Bhanduri project.
- Goa strongly opposed it as Mahadayi is one of the two rivers the State is dependent on and thus Mahadayi Water Disputes Tribunal was set up in 2010.
Read more about the Mahadayi Dispute and award of the tribunal at: