- Client:Tokay Property Developments
- Locality:City of Cockburn
- Summary:Implementation a Wetland Foreshore Management Plan for a portion of Lake Coogee commencing in 2012. Extensive weed control required for problematic species, followed by planting of 48,000 wetland seedlings.
In 2012 Tranen was commissioned to implement a Wetland Foreshore Management Plan for the rehabilitation of a portion of Lake Coogee, adjacent to a small new subdivision.
Constraints & Issues
- The site was a highly degraded wetland, dominated by problematic weeds.
- Some area are seasonally inundated with water.
- The ground was hard along one site boundary due to construction of a limestone wall.
Our Management Approach
- The upper 100 mm of the site was scalped after herbicide application to remove dead vegetation and weed seed contained in the topsoil.
- 48,000 wetland seedlings were planted.
- Tree guards were installed around all trees and shrubs to obviate herbivory and facilitate seedling establishment. Rush and sedge species did not require them.
- In hard areas, planting holes were augured to facilitate planting and loosening of soil to assist root penetration. Wet areas were progressively planted as winter water levels receded.
- In 2015 the completion criteria were achieved, on time and within budget. The site was then handed over to the City for future management.
- Forward planning, intensive site preparation and follow up weed control were the keys to success.
- Plant density was significantly higher than expected, and weed levels were low throughout the life of the project.