The Black Duck Lake System is a series of six water bodies located within the Freshwater Creek catchment, at Murrumba Downs. The Black Duck Lake System includes four urban lakes and two constructed wetlands. The lake system was originally constructed in circa 1940 as a series of dams providing irrigation to the surrounding pineapple farms.
The primary function of the lake system is to provide treatment of stormwater from the surrounding catchment. In addition, within the urban landscape, the lake system is a valuable environmental corridor that connects complex natural ecosystems, natural areas and open space for wildlife movement, protection of natural resources, and green space for the enjoyment of local residents.
The condition assessment for Black Duck Lake System undertaken in accordance with Council’s lake management strategy identified a range of issues within the system requiring rectification, including:
- Presence of favourable mosquito habitat
- Poor stormwater treatment performance
- Occasional algal blooms
- Abundance of weeds and other pest species
- Limited access opportunities to carry out maintenance tasks
The rectification actions to be implemented as part of this project will address the identified issues by revegetation with appropriate local species, providing dedicated maintenance access points and by reducing the underlying causes of poor water quality. In completing the works, the project will:
- Restore the vital water quality treatment function
- Improve the ecology of the lake system
- Reduce the area favourable to mosquitoes and provide habitat for mosquito predators
- Enhance the lake systems environmental and aesthetic values.