The 'Wetlands below Lock 1' will be inundated with fresh water if the Pomanda Weir is built. For several years now these wetlands have been drying out. There is a risk that some wetlands will turn acidic, and there is a risk that the toxic brew that is produced could flow into the River Murray very near where Adelaide's water supply is sourced. The delaying tactics with the construction of the Pomanda Weir could result in a toxic legacy with some of the lower Murray and Lakes region being gradually destroyed by acid...read more Other issues for the area 'Below Lock One' include houses at risk, the Swanport Bridge, and water salinity. Click on the 'pins' to read more about each wetland and view a more recent satellite image. View in Google MyMaps. From a SA MDB NRM media release in 2007,
This 2008 CSIRO report looked at nine 'unmanaged wetlands' below Lock 1 (6MB) On page 5, the scientists have put these nine into ASS risk categories ranging from moderate to extremely high. The wetlands studied are located on the map below using the scientist's UTM coordinates of their soil samples. According to this 2009 presentation, Wetlands between Lock 1 and Wellington (3MB), there are eighty wetlands between Lock 1 and Wellington. Twenty-five of these wetlands will be 're-wet' when the Pomanda Weir is built. Of these twenty-five, fourteen wetlands below Lock 1 will require 'some level of ASS management'. These twenty-five wetlands are located on the map below. Click on the wetland below to see a more current hi-res satellite image. Each image is approximately 500kb. Coolcha Lagoon, Teal Flat and Teal Flat Hut, Younghusband, Lake Carlet, Youndhusband West, Mannum Swamps, Reedy Creek, Riverglades, Mason Rock,Tailem Bend, Devon Downs North, Walker Flat South Lagoon, and Craignook Wetlands studied in the CSIRO report above are: Swanport, Ukee, Kroehns Landing, Noonawirra, North Purnong, Murrundi, Lake Carlet, Devon Downs South, and Devon Downs North. This is Purnong Lagoon wetland . Not mentioned in either the MDB NRM Board report above, nor in the CSIRO report below. Other problems in the region below Lock 1 and Blanchetown are levee cracking and bank slumping. |