India’s unique peninsular and sub-continental geography places it at the center of South Asia’s hydro-politics. Sharing land borders with six countries, India acts as both an upper-riparian state (vis-à-vis Bangladesh and Pakistan) and a lower-riparian state (vis-à-vis China and Nepal). Managing these transboundary rivers involves navigating complex bilateral treaties, data-sharing mechanisms, and strategic infrastructure developments under the framework of international water jurisprudence.
India–Pakistan: The Indus Water Treaty (IWT)
The Indus River system comprises the main Indus River and its five major tributaries: the Jhelum, Chenab, Ravi, Beas, and Sutlej. Hydro-relations between India and Pakistan are strictly governed by the Indus Waters Treaty, signed in 1960 with the World Bank as a signatory.
Allocation of Rivers
- Western Rivers: The waters of the Indus, Jhelum, and Chenab (accounting for roughly 80% of the total volume) are allocated to Pakistan. India is permitted “Non-Consumptive” use, including domestic use, navigation, and run-of-the-river hydroelectric projects, subject to strict design constraints specified in the treaty annexures.
- Eastern Rivers: The waters of the Sutlej, Beas, and Ravi (accounting for roughly 20% of the total volume) are allocated exclusively to India for unrestricted use.
Key Flashpoints and Hydro-Disputes
- Kishenganga Hydroelectric Project: A 330 MW run-of-the-river project built by India on the Kishenganga River (a tributary of the Jhelum) in Jammu and Kashmir. Pakistan raised objections at the Permanent Indus Commission (PIC) and the Permanent Court of Arbitration (PCA), claiming the diversion of water violates treaty parameters.
- Ratle Hydroelectric Project: An 850 MW run-of-the-river power station under construction on the Chenab River. Pakistan objects to its storage capacity and pondage design.
- Tulbul Navigation Project / Wular Barrage: Located on the Jhelum River at the mouth of Wular Lake. India halted construction in 1987 following Pakistani objections that the project could control river flow; negotiations remain stalled.
Dispute Resolution Mechanism
The IWT features a three-tier dispute resolution mechanism:
- The Permanent Indus Commission (PIC): A bilateral body that meets annually to exchange data and resolve technical questions.
- Neutral Expert: Appointed by the World Bank to address technical differences.
- Court of Arbitration: Convened for formal legal disputes regarding treaty interpretation.
India–Bangladesh: Lower-Riparian Dynamics
India and Bangladesh share 54 transboundary rivers. The principal institutional mechanism governing these waters is the India-Bangladesh Joint Rivers Commission (JRC), established in 1972.
The Ganges Water Treaty (1996)
A 30-year bilateral agreement signed to regulate the sharing of surface waters at the Farakka Barrage in West Bengal during the lean season (January to May). The treaty expires in late 2026, making its review and renewal a critical bilateral focus.
The Teesta River Dispute
The Teesta River originates in Sikkim, flows through West Bengal, and enters Bangladesh to join the Brahmaputra (Jamuna). Bangladesh demands an equitable share of Teesta’s water during the dry season to sustain its agricultural northern plains. An agreement drafted in 2011 proposed a 42.5% share for India and 37.5% for Bangladesh during the lean season. However, the treaty remains unsigned due to strong structural objections from the West Bengal state government, which cites water scarcity in the North Bengal region.
Other Key Transboundary Developments
- Kushiyara River Treaty (2022): A historic interim water-sharing agreement allowing Bangladesh to withdraw 153 cusecs of water from the common border river Kushiyara, benefiting irrigation infrastructure in Bangladesh’s Sylhet region and Assam.
- Feni River: India and Bangladesh signed an MoU allowing India to withdraw 1.82 cusecs of water from the Feni River to supply drinking water to Sabroom town in Tripura.
India–China: Upper-Riparian Asymmetry
China occupies the Tibetan Plateau, the source of major Asian river systems including the Brahmaputra (Yarlung Tsangpo) and the Indus (Sengge Zangbo). Unlike India’s treaties with Pakistan and Bangladesh, there is no formal water-sharing treaty between India and China.
The Brahmaputra (Yarlung Tsangpo) Dilemma
The Yarlung Tsangpo flows eastward through Tibet before making a sharp turn at the Grand Canyon (Great Bend) to enter Arunachal Pradesh as the Siang, later becoming the Brahmaputra in Assam.
Key Geopolitical Concerns
- Cascade of Dams: China has constructed or planned multiple run-of-the-river dams on the mid-stream of the Yarlung Tsangpo (e.g., Zangmu, Gyaca, Dagu, and Jiexu). While China asserts these do not store water or reduce downstream flow, India worries about sudden water releases during monsoons or flow reduction during dry seasons.
- The “Mega-Dam” at the Great Bend: China’s proposals to build a massive hydroelectric project near the Line of Actual Control (LAC) raise significant hydrological, ecological, and seismic risks for Northeast India.
- Hydrological Data Sharing: Bilateral MoUs mandate that China provide hydrological data (water level, discharge) during the monsoon season (May to October) for the Brahmaputra and Sutlej to assist India in flood forecasting. Tensions along the LAC have occasionally disrupted this data exchange.
India–Nepal: Sharda and Kosi Systems
India and Nepal share several fast-flowing, Himalayan rivers that feed the Gangetic plains, including the Mahakali (Sharda), Gandak, Kosi, and Ghaghara (Karnali). Cooperation is structured through the Joint Committee on Water Resources (JCWR).
Major Bilateral Treaties and Joint Ventures
- Kosi Treaty (1954): Aimed at flood control and irrigation. The Kosi Barrage was constructed near the India-Nepal border. Frequent course changes by the Kosi River (“The Sorrow of Bihar”) require continuous joint management, which faces occasional local political friction over rehabilitation and land compensation in Nepal.
- Gandak Treaty (1959): Governs the Gandak Barrage at Valmikinagar, providing irrigation networks to Bihar, Uttar Pradesh, and parts of Nepal.
- Mahakali Treaty (1996): An integrated treaty for the development of the Mahakali River, including the Pancheshwar Multipurpose Project (PMP). The project aims to generate substantial hydroelectric power and irrigate large areas in Uttarakhand and Nepal, though final project execution reports face prolonged delays over water allocation details.
International Water Laws and India’s Position
| Convention / Principle | Core Premise | India’s Legal Standing |
| Helsinki Rules (1966) | Asserts the principle of “equitable utilization” of transboundary watercourses based on geography, climate, and past utilization. | India incorporates these principles guidelines into its bilateral negotiations. |
| UN Watercourses Convention (1997) | Codifies obligations of “no significant harm” and prior notification before executing major modifications on shared water systems. | India (along with Pakistan and China) is not a signatory to this convention, preferring bilateralism over global frameworks. |
| Harmon Doctrine | Absolute territorial sovereignty, allowing an upper-riparian state unrestricted rights to water within its boundaries. | Widely rejected globally; neither India nor its neighbors officially endorse this doctrine. |
Trivia for UPSC Prelims
- Amlekhgunj Pipeline vs Transboundary Water: While India shares surface water networks with Nepal, the two nations successfully built South Asia’s first cross-border petroleum pipeline, demonstrating deep cross-border liquid resource management.
- The “Great Bend”: The Yarlung Tsangpo drops nearly 2,000 meters over a short stretch at the Great Bend before entering India, creating one of the highest concentrations of hydroelectric potential in the world.
- Farakka Barrage Impact: Built in 1975, the barrage was designed to divert 40,000 cusecs of water from the Ganges into the Hooghly River to flush out silt and keep Kolkata Port operational, which became the structural genesis of the water dispute with Bangladesh.