Submissions to the 2026 Murray-Darling Basin Plan Review closed earlier this month. The Authority is now writing up their report has been clear that it won’t be proposing changes to the Sustainable Diversion Limits.
That choice deserves more attention than it has received because these limits are a mechanism which would be an obvious lever to employ. They cap extraction and are the scale variable which is the most legible instrument the Authority has to address what most public commentary still treats as the Basin’s central problem: how much water is being taken out. Holding them steady and reframing the work around system resilience, river connectivity and ecological function is not a small adjustment. It is a quiet acknowledgement that the binding constraint sits elsewhere.
This is the work of building a three-axis materiality map for the territory. Not just accounting for scale, but also coupling (where in the system a choice has impact) and temporal lag (how long between the signal and the consequence). The Authority’s own framing of the review’s focus reads like a description of those two missing axes. The fish kills aren’t a quantity problem, nor is the Tinderbox drought. Both are the result of coupling-and-lag problems that the scale dial can’t approximate.
So it appears that the move towards a more robust framework is real. The harder question is what kind of stewardship the Authority is now trying to do.
Two modes of stewardship
There’s a distinction that doesn’t get named often enough in governance discussion between restoration and regeneration. They do sound similar and are often conflated but can actually produce very different operating models.
Restorative stewardship assumes the reference point is recoverable. The goal is to return the system to a known prior state such as the river before it was over-allocated, the ecosystem before it was fragmented, the floodplain before it was disconnected. This stance has shaped most environmental governance for the past half-century. Maintain, repair, restore. It works when the baseline is a real and stable target.
Regenerative stewardship assumes the future doesn’t resemble the past. The goal isn’t a return but cultivating the conditions for the system to sustain function under conditions not yet encountered. The question shifts from “what state are we trying to recover?” to “what capacity does this system need to meet the future we’re actually heading into?”
In a stationary climate, the distinction is mostly philosophical. In a non-stationary one, it’s operational. Restoration aims at a target that is itself moving. The longer the lag between framework and territory, the wider the gap between what governance optimises for and what the system actually requires.
The 1.5°C threshold of temperature increase has been crossed. Hydrology has moved as have fire regimes. The historical reference conditions most environmental governance is still designed around no longer exist in the way that the framework assumes. Restoration logic continues to reach for the past, but it’s now trying to capture an ideal that is no longer relevant.
Why the diagnostic and the operating mode are paired
Three-axis materiality and regenerative stewardship aren’t two unrelated ideas that happen to come up in the same essay. They are paired by construction.
Single-axis materiality, focusing on scale only, is the diagnostic stance that produces restorative stewardship. If the question is “how much,” the answer is always “less” or “more,” and the intervention is always calibrated to magnitude. Bring the volume back toward what worked before. That’s really the only move available.
Once coupling and lag come into view, the question changes. It becomes “what capacity is being eroded, where in the network, and how late will we know?” That question cannot be answered by returning to a preferred prior state. It asks for adaptive capacity, the ability to function under conditions that haven’t arrived yet. The diagnostic produces the operating mode.
What the Basin Plan Review is doing though perhaps without naming it this way, is making this pairing visible. The scale lever is held steady. The work has been reframed around the other two axes. The operating mode that follows is no longer restorative in any honest sense, even if the language of “return to” and “recover” lingers in the documents.
The architecture problem
Whether the shift actually becomes operationalised depends on something the review itself cannot fix.
Risk registers, accountability frameworks, performance reporting, ministerial briefing structures, board papers were all built for single-axis materiality and restorative stewardship. Their categories assume baselines and their thresholds assume return targets. Their evidence chains assume that the most important question is one of magnitude. The institutional architecture is calibrated to the diagnostic stance the review is moving away from.
This is the gap. The Authority can reframe its work but the infrastructure that holds the work in place hasn’t caught up. New questions need new instruments to be answered.
This is the territory the next essay in this series begins to explore but in a different register. The Living Ledger asks what happens when an entire economy is run by a single metric (GDP) that cannot see coupling or lag and what institutional architecture would actually be needed to govern multi-capital systems properly. It is the same problem the Basin is wrestling with, scaled up to the national accounts.
If your organisation is wrestling with a decision that scores low on scale but you suspect sits on the other axes or you are operating inside a framework that assumes a starting point you no longer trust, these are exactly the diagnostics Emerdigm is built to apply. Get in touch →