Latest Insights
Insights on ecological engineering, mine rehabilitation, landscape rehabilitation, water reuse, biosolids, revegetation, forestry and natural capital from Verterra’s team of scientists and engineers.
Why mine rehabilitation should be measured by trajectory as well as condition
Early vegetation cover is an important sign of mine rehabilitation progress, but it does not confirm that the underlying soil and ecosystem will continue to function. A paper presented by Dr Bernhard Wehr at Mine Closure 2026 argues that rehabilitation should also be assessed by its trajectory towards the intended post-mining land use.
A newly rehabilitated mine site starts from a point of major disturbance. Soil horizons may have been removed or mixed, topsoil may have spent years in stockpiles, and the materials available for reconstruction can differ substantially from the soils supporting nearby reference ecosystems.
Despite this, rehabilitation performance is often judged through point-in-time comparisons with mature analogue sites. This can create unrealistic expectations about how quickly a manufactured growth medium should resemble natural soil, while providing limited evidence about whether the rehabilitated system is developing in the right direction.
At Mine Closure 2026 in Melbourne, Verterra Principal Soil Scientist Dr Bernhard Wehr presented a paper proposing a stronger basis for assessment. Building on earlier technical guidance prepared by Verterra for the Office of the Queensland Mine Rehabilitation Commissioner, the 2026 paper argues that rehabilitation trajectories provide more meaningful evidence of progress than condition alone.
Beyond Topsoil: A Practical Framework for Performance-Based Mine Rehabilitation
How do you actually create a system that functions, especially when the most fundamental resource – topsoil - is limited?
Across Australia, one of the most persistent challenges in mine closure is the availability and quality of topsoil. Even where topsoil exists, volumes are often insufficient, variability is high, and storage can degrade its biological and structural integrity rapidly.
The result? Rehabilitation strategies that rely on topsoil alone are increasingly constrained - and in many cases, fundamentally misaligned with the scale of the challenge. But there are solutions.
Why Soil Sampling is the Foundation of Successful Land Rehabilitation
When land rehabilitation fails, the cause is rarely at the surface. Vegetation struggles to establish. Slopes erode. Water runs off instead of infiltrating. Closure criteria are missed. Carbon, forestry, or biodiversity projects underperform. And ultimately, remediation costs escalate.
In most cases, the problem can be traced back to one thing: the soil beneath our feet.
At Verterra, soil sampling is not a box-ticking exercise. It is the foundation of every successful rehabilitation, soil amelioration and land-performance outcome we deliver.
Biosolids in Australia: Separating Myths from Reality
Across Australia, biosolids are becoming an increasingly valuable resource for improving soil health, boosting productivity and closing nutrient loops. Yet despite decades of safe use and clear state and national guidelines for usage, misconceptions still hold many landholders back from taking advantage of this opportunity.
At Verterra, we work with utilities, processors and farmers to develop safe, reliable and scientifically robust biosolids programs. Below, we break down some of the most common myths—and the real facts behind them.