A complex system of barrages has been constructed to prevent the influx of seawater from the Coorong Lagoon as its flows into Lake Alexandria near Swan Hill and it is bordered on its west by the Lake Eyre basin.
Movement of the Cadell Fault 25,000 years ago caused one part of this river system to flood low-lying adjacent areas, creating the Barmah wetlands, home to a unique species of red gum trees. This river system contains an unusual eel-tailed catfish and the oldest extant fish traps in the world are located upstream on this river system at Brewarrina. High levels of iron sulfide in the lower course of this river system oxidize when exposed to air during droughts causing acidity levels of below 2 pH in some parts. One part of this system arises from the confluence of the Culgoa and Barwon Rivers and flows across its namesake "Downs" before meeting the other part at Wentworth. A complex system of barrages has been constructed to prevent the influx of seawater from the Coorong Lagoon as its flows into Lake Alexandria near Swan Hill and it is bordered on its west by the Lake Eyre basin. Edwards Crossing was the first bridge over this river system as it flows along the border between Victoria and New South Wales and it provides up to 40% of the freshwater to Adelaide. For 10 points, identify this vast river system of Australia, the combination of its two longest rivers.
Movement of the Cadell Fault 25,000 years ago caused one part of this river system to flood low-lying adjacent areas, creating the Barmah wetlands, home to a unique species of red gum trees.
Murray-Darling River System [prompt on either, but only accept both]