Restoring The Warialda Creek
A Community-Led Response to Invasive Weeds
Capacity building - LEP23 - 015_LLCNS
The issue
Invasive weed Arundo donax commonly known as giant reed, cane grass, or even bamboo (as it is known in Warialda) is rapidly overtaking river systems across New South Wales. Its aggressive growth displaces native riparian and aquatic plant species, reduces biodiversity, and alters natural river processes.
Dense infestations create ideal breeding conditions for European carp, further degrading aquatic ecosystems. For local communities, the spread of Arundo donax accelerates riverbank erosion, limits recreational access, and diminishes the cultural, environmental, and economic value of waterways. As degradation continues, landholders, councils, and community groups face growing challenges, with few practical or affordable solutions currently available to halt the decline.
The solution
The Rotary Club of Warialda has previously addressed the invasion of giant reed along local waterways during the 2019 drought, achieving positive results.
Following removal efforts, riverbanks began to naturally recover through the re-establishment of native reeds, grasses, and tree species. However, consecutive good seasons and increased upstream flows have allowed the giant reed to reinvade the area. In response, local community members have partnered with Northern Slopes Landcare Association to seek the necessary on-ground approvals from Crown Lands and NSW Fisheries. Collaboration with Gwydir Shire Council has further strengthened the approach, with council crews undertaking safe slashing works and planning future use of excavators and mulchers, alongside stem injection to control regrowth.
The impact
While on ground works have progressed gradually, measurable improvements in river access and water quality are already evident. The removal of dense giant reed infestations has reopened sections of the riverbank, allowing greater light penetration and improved water flow. The project has also attracted external support, including funding from the Australian Koala Foundation to re-vegetate a section of the river with native koala habitat trees.
Community involvement has been central to the project’s success. OzFish Unlimited supported the planting works, alongside students from all three Warialda schools who each helped plant sections of the riverbank. Members of the Warialda Rotary Club engaged with students on site, explaining the importance of healthy riparian habitat for the overall health of the river system, both within the waterway and along its banks. Over time, these plantings will provide food and shelter for koalas while strengthening bank stability and enhancing biodiversity for a wide range of terrestrial and aquatic species.
Key facts
- Invasion of Arundo donax (giant reed) degrading riverbanks and aquatic ecosystems
- Loss of native vegetation, reduced water quality, increased erosion, and improved habitat for invasive European carp
- Community Lead Solutions by The Club of Warialda
- Actions include giant reed removal, bank rehabilitation, revegetation with native and koala habitat species
- Community Involvement from Local volunteers and students from Warialda schools