Collaboration in the Lachlan restores wetland habitat

A little pied cormorant takes off from the water at Wilbertroy lagoon. Waterbirds flocked to the site following watering trial. Photo credit: Warren Chad.

Wilbertroy Lagoon and Evergreen Wetland are two important wetlands in the Lachlan system. Situated along a natural flood pathway that connects to the Lake Cowl system and the Bogandillon Creek swamp, these wetlands act as refuge areas for native vegetation and wildlife, especially during dry periods.

Wilbertroy Lagoon can retain water for up to two years, while Evergreen Wetland has a four-month capacity.  

To protect and enhance these habitats, the Commonwealth Environmental Water Holder (CEWH) partnered with Jemalong Irrigation Limited (JIL) and local landholders to deliver environmental water to the sites. These water deliveries have generated significant ecological and social benefits which can be seen in the video below.  

The Lachlan Area-scale Project, led by researchers from the University of Canberra, includes monitoring of these wetlands. Scientists have documented the transformation of these wetlands’ from dry, invasive plant-dominated landscapes to thriving areas rich in native aquatic and semi-aquatic plant species. This demonstrates how important environmental water is for keeping wetlands healthy and supporting biodiversity.

Prior to the watering trial, terrestrial-dry weeds such as thistles and flax-leaf fleabane were common at Evergreen. Photo: Alica Tschierschke.
Wetland plants are abundant following the watering trial at Evergreen, with Potamogeton, Myriophyllum, nardoo, and juncus flourishing. Photo: Alica Tschierschke.

Beyond ecological outcomes, these projects have fostered community engagement and education. A recent example of this was when Bedgerabong School students visited the wetlands. They learnt firsthand about environmental restoration and how different groups can work together to manage water.

This work highlights the on-ground impact of collaborative water management. It provides a model for integrating environmental water delivery, monitoring, and community involvement.

Partners and contributors included CEWH, NSW DCCEEW, Jemalong Irrigation, University of Canberra, the Australian River Restoration Centre (ARRC), and local landholders Tim & Jenny Fay at Wilbertroy and Mick & Anita Cantwell at Evergreen.

Our work in the Lachlan River System

The Lachlan River System flows through the lands of the Nari Nari, Ngiyampaa, Wiradjuri, Muthi Muthi and Yita Yita Nations, forming part of Songlines and Dreaming tracks. Environmental water is used in the Lachlan River system to support the significant ecological values that occur across the catchment, particularly those most affected by changes to flow regimes. Learn about the work we're doing in this river system and key insights gained as part of the Flow-MER program.

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