Springbrook Groundwater Investigation

Springbrook Groundwater Investigation (SGI) Final Report 2025

IN THIS STUDY:

Scientists have confirmed that Springbrook’s ecosystems depend on groundwater, but they also acknowledge that the study has not yet observed how the system behaves during drought conditions. In other words, the risks arehigh and not yet fully understood, which makes precaution particularly important in a World Heritage landscape.

Based on the Executive Summary, Conclusions, and key findings of the report, there are several important points that should concern anyone interested in protecting Springbrook’s World Heritage values.

Key Findings

The report concludes that Springbrook’s aquifers, streams, waterfalls, and ecosystems are “tightly coupled and highly sensitive to hydrological change.” In simple terms, changes to groundwater levels can directly affect creeks, springs, waterfalls, rainforest health, and wildlife habitat.

The investigation also confirms:

• Strong connections between groundwater, surface water, and rainforest ecosystems.
• Groundwater-dependent rainforest species exist at Springbrook.
• Many springs and waterfalls are fed by groundwater emerging from basalt aquifers.
• The area contains rare and endangered species that rely upon stable water supplies.
• The World Heritage Area is already classified by IUCN as being of “Significant Concern” due to existing pressures.

Concerns About Commercial Water Extraction

The report specifically notes that the project was initiated because residents and conservation groups were concerned that commercial groundwater extraction posed risks to groundwater-dependent ecosystems and to Springbrook’s World Heritage values.

It also recommends:

• Greater regulation of commercial groundwater extraction.
• Public disclosure of extraction volumes.
• Long-term monitoring of extraction impacts.
• Prioritising protection of sensitive ecosystems when making groundwater decisions.

Important Limitation

Perhaps the most significant finding is that the study period occurred during unusually wet years.

The authors repeatedly state that:

• Groundwater recharge was unusually high.
• The system has not yet been tested under drought conditions.
• The impacts of commercial extraction cannot be accurately assessed because there was insufficient dry-period data.
• Scientists do not yet know at what groundwater level springs may stop flowing or ecosystems may begin to suffer.

This means the report does not conclude that current or future extraction is safe. Rather, it concludes that more monitoring is needed before such claims can be made.

Proposed Activities Requiring Further Assessment

The report identifies several activities or pressures that could potentially affect the water table and World Heritage values but for which the evidence remains incomplete:

• Commercial groundwater extraction (“water mining”)
• Increased groundwater abstraction and export from the catchment
• Development pressures affecting recharge areas
• Climate change impacts on rainfall, cloud interception, and groundwater recharge
• Activities that could reduce spring flows feeding creeks and waterfalls

Environmental Assessment Concerns

The report notes that a recently approved commercial water extraction proposal on Repeater Station Road was approved through the Planning and Environment Court and states that:

“This matter has not been referred to the Federal Government”

despite the authors identifying potential triggers relating to World Heritage values and threatened species under federal environmental legislation.

Brief Summary

The report does not support the view that Springbrook’s groundwater system can safely absorb unlimited extraction or development.

Instead, it concludes that Springbrook is a highly sensitive World Heritage ecosystem whose aquifers, streams, waterfalls, rainforests, and wildlife are closely interconnected. The authors repeatedly warn that insufficient dry-weather data exists to determine the long-term impacts of commercial groundwater extraction and recommend stronger monitoring, greater transparency, and tighter regulation before further pressures are placed on the system.