Sixty Gigawatts, Zero Guarantees

The Commitment India Is Relying On Has Already Failed Once China's Foreign

Ministry says it "always maintained a highly responsible attitude toward transboundary river development" and that the mega dam "will not have adverse effects on downstream areas." That is the actual commitment on the table - not a treaty, but a stated diplomatic assurance backed by the 2006 Expert-Level Mechanism on hydrological data sharing.

The relevant question isn't whether that commitment sounds reassuring. It's whether the data shows it has actually held up when it mattered. It hasn't. Indian officials themselves acknowledge that hydrological data sharing under the ELM "has not been regular and has on occasion been suspended during difficult periods in relations"

• meaning the one mechanism India has for advance warning about dam operations fails specifically during the periods of India-China tension when India would most need it. This is the precise link in the chain that breaks: not the absence of a formal treaty, which was never going to happen given China's position as upper riparian with no legal obligation to sign one, but the political-will dependency built into the informal mechanism that exists instead.

Why "Run-of-the-River" Doesn't Mean What It Sounds Like

China describes the project as "run-of-the-river," a term that typically implies minimal storage and limited ability to control downstream flow deliberately. But the project still involves a reservoir at Mainling and a 40-km diversion tunnel through the Great Bend - meaning China retains real capacity to alter timing and volume of downstream releases, even if the annual net flow eventually evens out.

The commitment implicit in "run-of-the-river" framing is "we cannot meaningfully control your water"; the actual engineering data shows a reservoir and tunnel system fully capable of short-term flow manipulation regardless of long-term averages.

This distinction matters because India's actual exposure isn't primarily about total annual volume - it's about the timing of releases during monsoon peaks or dry-season troughs, exactly the kind of short-term control a reservoir-and-tunnel system retains even under a "run-of-the-river" label.

And the August 26 glacial collapse, while not directly connected to the dam site, demonstrates that this exact seismic zone can fail catastrophically without warning - raising the stakes on exactly the kind of advance notification the suspended ELM mechanism is supposed to, but doesn't reliably, provide.

What's genuinely working here is that India does have an institutional channel - the ELM predates this crisis and gives both sides a forum that a country with zero relationship would lack entirely. What's not working is that the channel's actual function, regular data sharing, is precisely the part that political tension switches off, which is also precisely when India needs it switched on.

For the exam, the sharp point isn't "China is building a dangerous dam." It's that India's downstream protection depends entirely on a data-sharing habit rather than an enforceable obligation - and that habit has a documented history of breaking exactly when bilateral relations are strained enough to make the dam's behaviour most uncertain.