Improving on-farm water security: lined catchment demonstration progresses
The lined catchment demonstration, led by the Barossa Improved Grazing Group (BIGG), is supported by the SA Drought Hub through a targeted program of extension and promotion activities. These activities are designed to showcase and promote the benefits of lined catchment systems across the Barossa Ranges, translating the demonstration into practical, on-farm insights through site walks, events, extension materials, video and media. This approach enables producers to better understand the design, construction and benefits of lined catchments as a water security solution.
On-farm water security is a key priority for producers in the Barossa Ranges, where access to mains or potable water is limited and reliance on dams and bores is increasing under declining rainfall and run-off conditions. Previous work led by BIGG identified lined catchments as one of the most cost-effective long-term options for improving water supply reliability, driving strong landholder interest in this demonstration.
Below is an update from BIGG on the construction progress of the demonstration site in Flaxman Valley:
It’s been a busy few months at the BIGG Lined Catchment project site in Flaxman Valley with works nearing completion.
This project demonstrates how lined catchments can be effectively constructed and integrated with existing farm infrastructure to harvest rainfall and improve water security. In this case, the 1-hectare poly-linedcatchment feeds directly into an existing dam, maximising water capture during rainfall events.
Construction has involved several key stages. The site was first cleared of an old vineyard, followed by detailed earthworks to shape and smooth the surface, ensuring proper runoff and preventing water pooling. Large sheets of poly lining were then rolled out and welded together to form a continuous surface across the catchment. Tyres have been strategically placed to secure the liner, and fencing has been installed to protect the area from livestock and wildlife.
A video showcasing the construction process is currently in production, offering a step-by-step look at how the system was built. BIGG also plans to host a field day at the site soon—keep an eye out for event details.
Through these activities, the project aims to build producer confidence in lined catchments and support informed decision-making around water security investments across the Barossa Ranges.
You can stay up to date with the project via the project page.