India, China, and How Not to Save the Brahmaputra

Why It Matters

The lack of cooperative water governance threatens regional stability, downstream livelihoods, and the long‑term health of a critical Himalayan river system.

Key Takeaways

• China plans 60 GW Great Bend dam upstream
• India's 20,000 MW Siang project aims water control
• Data sharing MoU expired 2025, not renewed
• Indigenous opposition ignored, risking ecological collapse

Pulse Analysis

China’s upstream dam surge on the Yarlung Tsangpo, culminating in the massive 60 GW Great Bend project, reflects a broader strategy to cement its status as the upper riparian hegemon. By refusing to ratify the 1997 UN Watercourses Convention and halting hydrological data exchanges since 2022, Beijing leverages information asymmetry as a geopolitical tool. These moves not only amplify Beijing’s control over water flows but also embed a layer of strategic uncertainty for downstream India, complicating flood forecasting and water‑resource planning.

India’s counter‑approach has been decidedly infrastructural rather than diplomatic. The Modi administration has allowed the Siang Upper Multipurpose Project—a 20,000 MW hydro‑electric scheme—to advance, seeking “prior appropriation” rights over the Brahmaputra’s waters. Meanwhile, the 2002 data‑sharing MoU lapsed in June 2025 without renewal, and expert‑level meetings remain symbolic. This dam‑for‑dam posture sidesteps multilateral basin negotiations, reinforcing a narrative of national security while marginalizing the voices of tribal communities in Arunachal Pradesh who fear displacement and ecological loss.

The resulting impasse jeopardizes more than bilateral ties; it endangers downstream populations in Assam, threatens biodiversity across the Himalayan corridor, and fuels mistrust among Indigenous groups. Without a binding, basin‑wide agreement, flood risks rise, and the river’s ecological integrity erodes. A credible, multilateral framework—potentially anchored in revised UN water‑course principles—could balance upstream development with downstream safety, ensuring that the Brahmaputra serves as a conduit for cooperation rather than conflict. Such an arrangement would protect both national interests and the river’s long‑term sustainability.