How Acid Sulfate Soils Affect Perth’s Groundwater
Acid sulfate soils (ASS) are naturally occurring soils and sediments rich in iron sulfides, commonly found in the low-lying coastal regions and wetlands that are so abundant in Western Australia.
When undisturbed and waterlogged, these soils are relatively stable. However, if exposed to air, the sulfides oxidise and produce sulfuric acid. This acidification can have profound effects on groundwater quality, leading to environmental and infrastructural challenges.
West Soil & Water has proven experience in preventing and managing groundwater contamination caused by ASS. If you would like to speak with one of our environmental consultants, please contact us at sam@westsoilandwater.com.au or on 0424 021 264.
Impact of Acid Sulfate Soils on Groundwater
ASS generated sulfuric acid can percolate through soil and enter groundwater systems. This process can be rapid and results in several detrimental effects:
Acidification of Groundwater: The introduction of sulfuric acid lowers the pH of groundwater, creating an acidic environment. This shift can disrupt the natural balance of aquatic ecosystems and render the water unsuitable for agricultural, industrial or potable uses.
Mobilisation of Heavy Metals: Acidic conditions increase the solubility of metals such as cadmium, lead, arsenic and aluminium. If present in the soil, these metals can leach into the groundwater, posing significant health risks to people and wildlife. These toxic risks apply whether the water is used for drinking or irrigation.
Degradation of Water Quality: Contaminated groundwater can exhibit reduced oxygen levels and elevated concentrations of dissolved metals. Such degradation can harm aquatic life and compromise the usability of the water for other applications.
Preventing Groundwater Contamination
To mitigate the adverse effects of ASS on groundwater, proactive management strategies are essential. WSW offers comprehensive services for acid sulfate soils in Perth. Designed to suit our unique environment, our services involve:
Baseline Investigations: Assessing the presence and extent of ASS on your site to inform effective management strategies.
Development of Acid Sulfate Soil Management Plans: Creating detailed plans that outline procedures for managing ASS during all phases of your project.
Soil Treatment Solutions: Implementing neutralisation and remediation techniques to mitigate acidification risks, with ongoing monitoring to ensure their efficacy.
Rather than ASS, groundwater contamination could be caused by fuels, asbestos or other industrial waste. For these issues, we also offer a suite of contaminated land services.
Engaging with professionals like WSW ensures that ASS-related challenges are addressed effectively, safeguarding both the environment and water resources.
Conclusion
Disturbed acid sulfate soils pose significant risks to groundwater quality in Western Australia, carrying the potential for long-term environmental and health impacts.
Proactive identification and management of ASS are crucial to prevent acidification and contamination. Effective management plans creating by engaging environmental consultants, can protect vital water resources and promote sustainable development.
If you would like to speak to a member of our team about creating a acid sulfate management plan, do not hesitate to contact us at sam@westsoilandwater.com.au or on 0424 021 264.