The Economics of Water in India
Sharing Rivers: Interstate Water Disputes
Why Indian states fight over rivers like the Cauvery, how tribunals divide water, and the economics of sharing a common resource.
Many Indian rivers flow through several states, leading to disputes over sharing water.
The Cauvery
- The Cauvery flows from Karnataka into Tamil Nadu.
- Both states depend on it for farming, especially rice.
- A tribunal gave its final award in 2007, which the Supreme Court modified in 2018, slightly increasing Karnataka’s share.
- The Cauvery Water Management Authority oversees sharing.
- In drought years, disputes flare, with protests and court cases.
Other disputes
- Krishna and Godavari among Maharashtra, Karnataka, Telangana and Andhra Pradesh.
- Mahadayi between Goa and Karnataka.
- Ravi-Beas between Punjab and Haryana, including the Sutlej-Yamuna Link canal.
Economics of sharing
- Upstream states have physical control.
- Downstream states claim historical use.
- Efficient sharing would direct water where it’s most valuable, but politics and rights matter.
Tribunals
The Inter-State River Water Disputes Act, 1956 allows tribunals, but decisions often take decades.
The dry year
In a drought year, Karnataka's reservoirs are low. Tamil Nadu demands its share for its crops; Karnataka says it needs water for Bengaluru's drinking supply. The dispute goes to court.
Thinking the upstream state owns the river
Rivers are shared, and tribunals allocate water among states.
Key takeaways
- Interstate rivers cause water disputes.
- The Cauvery dispute was settled in 2007, modified in 2018.
- Tribunals can take decades to decide.
- Sharing balances physical control, history and value.
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