Two of the world’s most intensively managed river basins are confronting versions of a problem Pakistan can no longer postpone.

In the American West, the Colorado River has been divided among states and users for more than a century, yet declining flows and depleted reservoirs have forced governments to confront an uncomfortable question: what happens when the physical river can no longer reliably meet the expectations built around it?

Across the Pacific, Australia’s Murray-Darling Basin confronted a broader problem. Decades of development had produced patterns of extraction that could not continue without damaging the river system’s long-term health. Australia therefore moved beyond allocation towards another question: how much water can be used sustainably?

Pakistan needs to ask both. The 1991 Water Apportionment Accord remains one of the federation’s most important political settlements. It divided the Indus waters among the provinces and established their respective entitlements. In a country where water is inseparable from federal trust, agriculture and provincial identity, that achievement should not be casually reopened.

But allocating a river is not the same as governing it. The Accord tells us who is entitled to water. It does not settle every question about shortage management, changing hydrology, verified deliveries, groundwater depletion or environmental needs.

This distinction between allocation, operation and sustainability is where Colorado and Murray-Darling become useful. Colorado’s most relevant lesson is the development of an operating architecture around an existing allocation system. Governments cannot renegotiate the foundational bargain every season. They need rules agreed before shortages arrive: hydrological triggers, reservoir criteria, conservation arrangements, forecast revisions and procedures for sharing scarcity.

Pakistan still lacks enough clarity at precisely this level. Whenever supplies tighten, familiar arguments return. Punjab and Sindh do not generally dispute the basic allocations in the Accord. The recurring disagreement concerns how shortages should be shared, how Paragraph 14 governing the regulation of supplies should be interpreted, which operational formula should apply, and whether forecasts and measurements are reliable.

A hydrological shortage becomes an institutional dispute, which quickly becomes a provincial political conflict. The answer is not to reopen the Accord. It is to build the missing operating system beneath it. The Council of Common Interests should approve an Indus Scarcity........

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