Engineering Asia’s Water Tower: Transboundary Governance Challenges of China’s Tibetan Plateau Mega-Projects

Institute for Security and Development Policy | Genevieve Donnellon-May

China is constructing the massive Mêdog Hydropower Station on the Yarlung Tsangpo and proposing the Red Flag River inter-basin transfer project, threatening downstream water security across South and Southeast Asia. These hydraulic mega-projects proceed without robust transboundary governance frameworks, leaving downstream nations highly vulnerable to unilateral upstream flow control.

Beijing's hydro-engineering push is driven by severe domestic crises, including falling groundwater levels in the North China Plain and the immense electricity demands of its green energy transition. While China maintains formal water-sharing treaties with northern neighbours like Kazakhstan and Russia, its arrangements with southern riparian states remain strictly consultative and legally weak. This institutional deficit is compounded by the expiration of the China–India hydrological data-sharing MoU in June 2023. Downstream states now lack critical telemetry. Rapidly melting Himalayan glaciers will further complicate future water attribution, making transparent data-sharing mechanisms an urgent regional necessity.

Comment

China's construction of the Mêdog Hydropower Station on the Yarlung Tsangpo alters downstream flow dynamics, creating severe operational vulnerabilities for riparian states. By controlling seasonal water volumes, Beijing gains unilateral leverage over the hydrological baseline of the Brahmaputra basin. This structural control allows Beijing to dictate downstream agricultural cycles in Bangladesh and India's northeastern states without formal institutional oversight.

Consequently, the expiration of the China–India hydrological data-sharing MoU in June 2023 leaves New Delhi without real-time telemetry. Early-warning systems in Assam are compromised. This data deficit directly degrades the operational readiness of the National Disaster Response Force during the monsoon season. Ultimately, the lack of structured data sharing along the Line of Actual Control transforms a localised hydrological dispute into a persistent security friction between New Delhi and Beijing.

Strategic Question for Discussion

If the China–India hydrological data-sharing MoU remains suspended, how can New Delhi mitigate the operational risks to disaster response planning in Assam without relying on Beijing's unilateral telemetry?

The trajectory indicates that New Delhi will increasingly rely on synthetic aperture radar satellite imagery and remote sensing to model Yarlung Tsangpo flow rates. While this space-based intelligence offers a partial alternative, my assessment is that it cannot fully replicate the hourly telemetry previously provided under the bilateral agreement. Consequently, Indian disaster management agencies are likely to operate with wider margins of uncertainty, potentially slowing evacuation timelines in the Brahmaputra valley.

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