Project Outline (2011-2013)
The Lower Ginninderra Creek Riparian Restoration Project (LGCRRP) is cross border collaboration between The Ginninderra Catchment Group (GCG), Greening Australia (GA), Regional Landcare Groups, Upper Murrumbidgee Catchment Coordinating Committee (UMCCC), Conservation Volunteers Australia, National Green Job Skills (NGJS) and the Yass Valley Council. The Federal and ACT Governments have provided funding for the project through the Department of Fisheries and Forestry (DAFF) and the ACT NRM Council.
Initially developed by GCG and GA to address dense woody weed infestation along the NSW section of Ginninderra Creek the project was expanded as a result of funding provided by the ACT NRM Council, the project now consists of two key area projects:
Lower Ginninderra Creek ACT
This section runs from the Lake Ginninderra spillway downstream to the end of the suburb of Dunlop and includes over 7 km of creek.
Works began in this section in September 2011 and involved small teams using cut and daub control techniques to target invasive woody weeds impacting on the riparian zone. Species targeted included Willows, Privet, Box Elder and Poplar suckers. In the first three months of the project more than 45 truck loads of woody weeds were removed. All debris was removed to prevent damage to infrastructure downstream during flooding events.
The project has involved over 50 volunteers from the Macgregor, Umbagong and North Belconnen Landcare groups, CVA and NGJS. This project has at times been a very physically draining experience but all involved have worked extremely hard and achieved fantastic results so far.
Stage 2 of the project will see planting of grasses and shrubs in selected areas of the creek to provide habitat refuges along the creek corridor. Using cut and daub to control the woody weeds minimises disturbance, nominal use of heavy vehicles and leaving the root system of removed trees in situ reduces the risk of erosion along stream banks. One other key structural advantage that the lower Ginninderra Creek has in its favour is that there is very strong grass and reed growth and whilst much of the grasses in particular are not native they are protecting the creek banks and flood plain areas from serious erosion during flood events. During high flow events grasses flatten out and do not impede the flow, unlike the thick patches of poplar suckers which create blockage points and divert fast flowing water creating scouring along creek banks.