The announcement that China has formally commenced construction of what is being described as the world’s largest hydroelectric project on the Yarlung Tsangpo River in Tibet has sent strategic shockwaves across South Asia. Estimated to cost around $168 billion and expected to dwarf even China’s Three Gorges Dam in power generation capacity, the project has raised serious concerns in India regarding water security, environmental risks, and the strategic implications of upstream control.
The development has also exposed an uncomfortable reality for New Delhi: India now finds itself in the same position that Pakistan has occupied for decades as a lower-riparian state dependent upon waters originating beyond its borders.
The question naturally arises: Will India now demand from China the same transparency, data sharing, consultation, and treaty compliance that Pakistan has long demanded from India under the Indus Waters Treaty?
The Legal Standing of the Indus Waters Treaty
The 1960 Indus Waters Treaty (IWT), brokered by the World Bank, remains one of the most successful and durable international water-sharing agreements in modern history.
The treaty allocated the three eastern rivers – Ravi, Beas, and Sutlej – to India while granting Pakistan rights over the three western rivers – Indus, Jhelum, and Chenab – with limited Indian usage under clearly defined conditions.
What makes the treaty unique is that it survived wars in 1965, 1971, the Kargil conflict of 1999, and numerous political crises. International legal experts have repeatedly pointed out that treaties cannot ordinarily be suspended unilaterally simply because political relations deteriorate.
The principle of pacta sunt servanda – agreements must be honoured – is one of the cornerstones of international law. Water treaties are especially important because they concern the survival, agriculture, energy security, and livelihoods of millions of people.
India’s Attempt at Unilateral Suspension
Following periods of heightened tensions with Pakistan, India has increasingly signalled its intention to “review,” “reconsider,” or effectively suspend aspects of the Indus Waters Treaty.
Pakistan has consistently maintained that such actions violate both the letter and spirit of the treaty.
From Islamabad’s perspective, water cannot be treated as a political weapon. Rivers flow according to geography, not politics. Any attempt to manipulate water access risks creating instability in an already volatile region.
The international community has generally been cautious in its response, encouraging dialogue, arbitration mechanisms, and adherence to treaty obligations rather than unilateral actions.
Many global observers worry that if water agreements can be disregarded whenever political disputes arise, it would set a dangerous precedent for transboundary rivers worldwide.
China’s Tibet Dam Changes the Equation
Now India faces a strategic dilemma.
The Yarlung Tsangpo originates in Tibet before entering India as the Brahmaputra River and eventually flowing into Bangladesh. It is the lifeline of millions living in Arunachal Pradesh and Assam.
Indian analysts have expressed concerns over three primary risks:
* First, the possibility of reduced downstream flows during dry seasons.
* Second, the potential for sudden water releases causing devastating floods downstream.
* Third, environmental and seismic risks associated with constructing a mega-project in one of the world’s most geologically sensitive regions.
These are precisely the concerns that lower-riparian states traditionally raise when upstream countries undertake major hydraulic projects.
The irony is difficult to ignore. For years, Pakistan voiced concerns about Indian hydroelectric projects on western rivers. Today, India is voicing remarkably similar concerns regarding Chinese projects upstream.
The Difference: Pakistan Has a Treaty, India Does Not
Perhaps the most important distinction is legal.
Pakistan and India are bound by a comprehensive treaty that includes mechanisms for data sharing, inspections, technical consultations, dispute resolution, neutral experts, and international arbitration.
India and China, however, do not possess an equivalent legally binding water-sharing treaty for the Brahmaputra basin.
As the upper-riparian state, China enjoys considerably greater freedom of action than India does under the Indus Waters Treaty.
This means New Delhi may find itself seeking precisely the sort of transparency and predictability that Islamabad has been requesting under existing treaty frameworks.
Implications for Pakistan
Pakistan is observing these developments with understandable interest.
The Chinese project does not directly affect Indus Basin flows. However, it reinforces an important geopolitical lesson: every upper-riparian state eventually discovers that water security is a shared challenge.
Pakistan’s long-standing argument has been that transboundary rivers should be managed through cooperation, technical transparency, and respect for international commitments.
If India now expects these principles from China, many in Pakistan will argue that New Delhi should demonstrate the same commitment toward the Indus system.
Implications for India
India’s challenge is more immediate.
Unlike Pakistan’s relationship with India, where a treaty framework exists, India has fewer legal instruments available to influence Chinese decisions regarding the Brahmaputra.
New Delhi must therefore rely on diplomacy, confidence-building measures, hydrological cooperation, and international engagement rather than legal enforcement mechanisms.
The situation also illustrates a broader strategic reality: power in international river systems is often determined by geography. Countries that are upstream possess significant leverage, while downstream states seek assurances, transparency, and predictable flows.
Is Water Becoming South Asia’s New Red Line?
Historically, wars in South Asia have revolved around territory, borders, and security concerns. Increasingly, however, water is emerging as a strategic variable with equal significance.
Climate change, glacier retreat, growing populations, rising food demands, and expanding energy needs are placing unprecedented pressure on regional water resources.
If states begin treating rivers as instruments of coercion rather than shared resources, the consequences could be severe.
Water wars are often predicted but rarely occur directly. More commonly, water disputes contribute to broader political tensions, economic pressures, and strategic mistrust.
That is why the preservation of water-sharing mechanisms is not merely an environmental issue; it is a matter of regional peace and security.
The Way Forward
China’s Tibet mega dam should serve as a wake-up call for all South Asian states.
The lesson is simple: today’s upper-riparian power can become tomorrow’s lower-riparian stakeholder elsewhere. Geography changes from basin to basin, but principles remain the same.
Transparency, prior notification, data sharing, environmental safeguards, and respect for international commitments are not signs of weakness. They are the foundations of stability.
As India raises concerns regarding China’s control over the Brahmaputra, the region will closely watch whether New Delhi embraces the same principles on the Indus that it now seeks from Beijing.
The larger question facing South Asia is not whether water can be used as a weapon. It certainly can.
The real question is whether regional leaders possess the wisdom to ensure that it never becomes one.
History suggests that rivers sustain civilisations. Politics should not be allowed to turn them into battlefields.
The writer is a freelance columnist.