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Project 3.3.2: Flow, transport and biogeochemical reaction mechanisms affecting nitrogen discharge from groundwater into Cockburn Sound

Investigating the mechanisms impacting nutrient flux in Cockburn Sound, including flow, transport and biogeochemical reactions.

20 October 2025

Westport has partnered with the Western Australian Marine Science Institution (WAMSI) to deliver the $13.5 million WAMSI-Westport Marine Science Program. This 3-year program is developing the latest data, information and modelling on the complex environmental systems and community values associated with Cockburn Sound.

Project 3.3.2 Flow, transport and biogeochemical reaction mechanisms affecting nitrogen discharge from groundwater into Cockburn Sound

Theme: Water and Sediment Quality 

Researchers: Wu, H. Prommer, M. Donn, J. Rayner, G. Davis. (2025)

 

Investigating the mechanisms impacting nutrient flux in Cockburn Sound, including flow, transport and biogeochemical reactions

Cockburn Sound has historically been impacted by nitrogen contamination and groundwater pollutants. 

This report presents a detailed analysis of nitrogen discharge from groundwater into Cockburn Sound and investigates the complex mechanisms governing nitrogen transport and transformation at the groundwater–marine interface in Cockburn Sound. Using high-resolution, local-scale numerical models, the research explores how aquifer stratigraphy, tidal dynamics, and biogeochemical processes influence nitrogen discharge into the Sound. 

This research provides valuable insights for managing nitrogen fluxes into Cockburn Sound, informing both future scientific studies and environmental management strategies.  

 

How Westport will use the report

Westport will use this report to inform its environmental management strategy and monitoring programs, to support the long-term health of Cockburn Sound.

 

Read the full report.

 

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