China&rsquo;s Mega Brahmaputra Dam Raises Strategic Red Flags for India and Bangladesh
Tensions Rise Over 5-Stage Hydropower Project Near Arunachal Border
In a move that could dramatically alter the geopolitics of transboundary water sharing in South Asia, <a title="China" href="https://www.benefitnews24.com/defence/china-using-pak-as-weapons-proxy-lt-gen-rahul-singh/15760" target="_blank" rel="noopener">China</a> has officially commenced construction of a massive dam project on the lower reaches of the Brahmaputra River&mdash;locally known in Tibet as the Yarlung Zangbo&mdash;at Nyingchi City, just across the border from <a title="India" href="https://www.benefitnews24.com/geo-politics/s-jaishankar-on-us-china-in-india-pak-clash/12419" target="_blank" rel="noopener">Arunachal Pradesh</a>. Valued at over USD 167.8 billion (1.2 trillion Yuan), the five-stage cascade hydropower project is poised to become the largest such initiative globally, reportedly surpassing the capacity of the Three Gorges Dam on the Yangtze.
While Chinese authorities claim the project is a strategic step toward carbon neutrality and the development of the Tibet Autonomous Region, Indian water experts and geopolitical analysts view it with growing alarm. The dam's proximity to India&rsquo;s eastern frontier and its potential to control or alter the Brahmaputra&rsquo;s flow raises serious environmental, livelihood, and national security concerns.
Downstream Anxiety in India and Bangladesh
The Brahmaputra River is not just a geographical feature&mdash;it is a lifeline for over 130 million people across Northeast India and Bangladesh. Originating in Tibet, the river flows through Arunachal Pradesh and Assam before entering Bangladesh. Any disruption to its natural flow&mdash;whether due to damming, diversion, or seasonal regulation&mdash;could destabilise the fragile hydrological balance of this ecologically sensitive and politically volatile region.
India&rsquo;s Ministry of External Affairs had earlier voiced its reservations, demanding that China uphold the interests of downstream nations. However, Beijing has repeatedly dismissed fears of any &ldquo;negative impact,&rdquo; asserting the project&rsquo;s safety and ecological soundness.
Nevertheless, given China&rsquo;s non-participation in any legally binding international water-sharing treaties&mdash;such as those under the UN Watercourses Convention&mdash;New Delhi and Dhaka remain sceptical. There is growing concern that China&rsquo;s control over upstream infrastructure could become a geopolitical lever, especially during monsoonal floods or dry spells.
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Strategic Implications for India
From a strategic standpoint, this development is not merely about electricity or hydrology. The dam sits alarmingly close to the India-China Line of Actual Control (LAC) in Arunachal Pradesh&mdash;a state China controversially claims as &ldquo;South Tibet.&rdquo; The possibility of using water as a weapon&mdash;whether through engineered floods or withheld flows&mdash;cannot be ruled out, particularly given the deteriorating India-China bilateral relations post-Galwan clashes.
Moreover, the environmental implications for Assam&rsquo;s flood-prone plains and the sediment-dependent agriculture of the Brahmaputra basin are yet to be fully studied. With no transparency mechanisms in place, India&rsquo;s agencies are left relying on limited satellite data and occasional hydrological disclosures from China, which are often seasonal or selectively shared.
Bangladesh&rsquo;s Silent Stake
Bangladesh, the farthest downstream country, may bear the brunt of seasonal flow alterations. Any reduction in freshwater flow during dry seasons or sediment imbalance could intensify salinity intrusion in the deltaic region, adversely affecting agriculture, fisheries, and drinking water supplies.
Given Dhaka&rsquo;s growing economic dependence on both Beijing and Delhi, its diplomatic room to manoeuvre on transboundary water issues remains limited. However, this mega-dam project may rekindle regional calls for a multilateral river governance framework&mdash;something both India and Bangladesh have supported in principle but not executed in practice.
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Time for a Regional River Governance Pact
With water emerging as a critical geopolitical resource, the Brahmaputra dam saga is a wake-up call for South Asia. India must intensify its upstream monitoring capabilities, expand bilateral water diplomacy with Bangladesh, and explore multilateral mechanisms to safeguard its water security. China&rsquo;s unilateral actions highlight the urgent need for a transparent, rules-based regime for managing shared rivers, particularly in an era of climate uncertainty.
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China starts dam construction on Yarlung Zangbo river in Tibet

$167 Billion Dam Project Near Arunachal May Disrupt India-Bangladesh Water Security

China's Brahmaputra Dam Sparks India Concern

$167 Billion Dam Project Near Arunachal May Disrupt India-Bangladesh Water Security

July 20, 2025 | 11:10 IST