Oxley-Wacol WWTP upgrade - EIS

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GHD developed two and three-dimensional hydrodynamic and water quality models for Brisbane Water as part of an Environmental Impact Assessment (EIS) for a proposed upgrade of the Oxley and Wacol wastewater treatment plants (WWTP).

The assessment involved quantifying the impact of the existing wastewater treatment plant configurations as well as determining the relative impacts of two proposed upgrade options on receiving water quality.

Water quality health indicators, including ammonia, nitrate, organic nitrogen, reactive phosphorus, chlorophyll a, dissolved oxygen, suspended solids, temperature and salinity, were modelled.

Complex processes simulated as part of the project included:

  • Nitrification
  • Eutrophication
  • Mineralisation
  • Absorption of organic matter
  • Sedimentation
  • Re-suspension and exchanges occurring at the seabed/water column interface
  • Water column/air interface

Model results were vital in the selection of a preferred WWTP option.

EIA & Approvals

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GHD provides holistic, integrated solutions for managing impact assessment and approvals. Our environmental and community planners, engineers and scientists work with you to understand your needs from concept phase through to decommissioning.

From the start of a project, we consider environmental and social factors to help you minimise potential impacts of a project, reduce approvals timeframes and compliance costs and increase community engagement and acceptance.

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