China is systematically deploying large-scale river infrastructure across South Asia to consolidate what analysts describe as ‘hydro-hegemony’ — using upstream control over shared rivers as a tool of geopolitical leverage. From the Medog Hydropower Project on the Tibetan Plateau to a proposed water management scheme on the Teesta River in Bangladesh, Beijing’s water strategy is raising alarms in New Delhi and beyond.

China’s Dam Dominance

According to data from the International Commission on Large Dams, China now operates 24,217 large dams — more than double the 10,053 held by the United States and nearly five times India’s 4,489. This infrastructure base gives Beijing unmatched capacity to regulate river flows that cross international boundaries, affecting millions of people downstream.

The scale of China’s ambition came into sharp focus when Beijing broke ground on the Medog Hydropower Project in 2025. Estimated to cost approximately USD 170 billion, the project would have a generation capacity roughly three times that of the Three Gorges Dam — itself the world’s largest hydroelectric power station at 22,500 MW.

The Medog Project and Downstream Anxieties

The Medog project sits on the Yarlung Tsangpo, which becomes the Brahmaputra in India and the Jamuna in Bangladesh. Any major upstream intervention on this river system raises serious downstream concerns about water flow, aquatic biodiversity, sedimentation patterns, and flood risk for millions in Assam, Arunachal Pradesh, and Bangladesh.

Participants at a China Expert Group Meeting organised by the Vivekananda International Foundation last September noted: “Initial analysis of satellite data focused on the deep U-bend of the river, approximately 25–30 km from the India-China border, where recent infrastructure developments, including roads, settlements and other facilities, indicated significant activity.”

The panel further noted that “reports indicate that the project will require four to six tunnels of 20–60 km each to divert water around a sharp bend in the river, entailing extensive tunnelling through a highly sensitive and geologically fragile area.” A January 2025 analysis from the Institute of South Asian Studies warned that the Medog project could have severe ecological consequences in Tibet, arguing it would worsen pressure on an already fragile plateau environment.

Notably, a report published in April by CCE News observed: “Perhaps the most striking feature of the Medog project is not its scale, its cost, or its geopolitical implications, but the near-total silence surrounding it inside China.” This contrasts sharply with the construction of the Three Gorges Dam, which generated fierce domestic debate before being suppressed — suggesting tighter information control around Medog.

Lessons from Three Gorges

The Three Gorges Dam, built across the Yangtze River in Hubei province between 1994 and 2012, displaced over 1.4 million people and submerged numerous archaeological sites. A 2020 report cited a study by the China Earthquake Administration which found that in the six years after the reservoir was filled in June 2003, 3,429 earthquakes were recorded along the reservoir — compared with only 94 in the period from January 2000 to May 2003. Critics have linked this seismic uptick to reservoir-induced stress on geological faults.

Environmental concerns associated with Three Gorges — including sedimentation, biodiversity loss, and increased landslide risk — are now being raised afresh in the context of Medog, which sits in an even more seismically active and geologically fragile zone.

The Teesta Gambit in Bangladesh

China’s water ambitions extend beyond the Brahmaputra basin. Beijing has proposed a Teesta River Comprehensive Management and Restoration Project in Bangladesh, a major water initiative that has drawn significant regional attention. The Teesta flows through Sikkim and West Bengal in India before entering Bangladesh through the Rangpur Division.

India and Bangladesh negotiated a water-sharing agreement in 2011, but its implementation was stalled by the then-opposition in West Bengal. Facing persistent water insecurity, Dhaka turned to Beijing to fill the gap. New Delhi is reportedly wary that Chinese involvement in the Teesta basin could give Beijing a strategic foothold in sensitive border regions, complicating India’s own water diplomacy with its eastern neighbour.

Analysts argue that the pattern mirrors Beijing’s Belt and Road Initiative playbook — where infrastructure financing translates, over time, into political leverage. This comes amid broader concerns about China’s expanding influence in South Asia, from Sri Lanka to Nepal to Pakistan.

A Consistent Strategic Pattern

Viewed collectively, China’s river infrastructure strategy reflects what observers describe as a deliberate approach: using large water projects to simultaneously meet domestic energy targets and accumulate upstream bargaining power over downstream neighbours. For India, which shares river systems with China across its northern and northeastern frontiers, the strategic implications are direct and urgent. How New Delhi responds — through diplomacy, its own dam-building, or international water law — will shape the hydro-political landscape of South Asia for decades.