Didn’t Tarradarrapin Creek play a vital role in the ecological tapestry of Brisbane. Tarradarrapin Creek originates in Alexandra Hills. It is a waterway that drains north into Waterloo Bay.
Tarradarrapin Creek is a fully urbanised catchment covering Birkdale. It also covers edges of Alexandra Hills and Wellington Point. The Tarradarrapin Creek catchment spans 13.4km2. The area includes Aquatic Paradise canal estate. It also includes the constructed lake Sovereign Waters.
Tarradarrapin Creek is flanked by narrow corridors of park or conservation land. Many stretches of the creek are channelled. The modified estuaries are hard lined into Aquatic Paradise and Sovereign Waters.
There is a bio-retention basin and swale on a western tributary. This lies between Quarry Rd and Birkdale Rd. This tributary flows into Woodgate Canal. It flows into the Aquatic Paradise canal estate in Birkdale. Several Gross Pollutant Traps and constructed wetlands surround Sovereign Lake. These treat stormwater runoff. This happens prior to entering the lake and Waterloo Bay.
The Tarradarrapin Wetland is a Ramsar listed wetland. It is recognised internationally. The Tarradarrapin Wetland is an important habitat for migratory birds.
The catchment drains to Waterloo Bay. Waterloo Bay is a High Ecological Value area. It has specific water quality objectives. These maintain environmental values. This is as per the Environmental Protection Water and Wetland Biodiversity Policy 2019.
The lower Tingalpa and Coolnwynpin catchment is near Tarradarrapin Creek. It is about 34.4km2. Land use is dominated by urban residential areas. Commercial spaces and parks are common. Tingalpa Creek below Leslie Harrison Dam forms the boundary between Brisbane and Redland cities.
The Hilliards Creek catchment is another neighbour of Tarradarrapin Creek. It covers an area of 28km2. It is dominated by urban residential land use in the lower catchment. This includes Wellington Point and Ormiston.
Native fish species reside in Tarradarrapin Creek. These include Southern purple-spotted gudgeon. Long-finned eel also live here. Another is Fire-tail gudgeon.
Redland City Council reported on freshwater water quality. Tarradarrapin Creek received a fair rating. This was mostly related to poor ratings for chlorophyll-a. It was also because of total suspended solids, nutrients and dissolved oxygen.
Modifications to channels impact Tarradarrapin Creek. Several canal, lake, and marina developments modify flow. These include Aquatic Paradise and Sovereign Waters on lower Tarradarrapin Creek.
The Tarradarrapin Creek sub-catchment is flat and highly developed. It is underlain by sedimentary rocks. There is alluvium along the channel. Also, Petrie Formation and low-lying coastal swamps are near the shoreline. Water infiltration and groundwater recharge have been substantially reduced by urbanisation. Run-off is high over these impervious surfaces. The area is prone to flooding.
The Tarradarrapin Creek area is a testament to urban development. It is a home to diverse species. The Tarradarrapin Creek faces challenges. These include habitat modification and water quality issues. Conservation efforts are essential. They maintain the ecological health of Tarradarrapin Creek. They preserve its significance. They ensure a sustainable future for its inhabitants.