New South Wales (NSW) Office of Water
It’s hard to picture just how flat Australia’s Murray-Darling Basin is, but picture this – tens of thousands of square kilometers braided with slow-flowing rivers and streams with virtually no fall in their channels. Amid the tangle is Colombo Creek, a modest stream with a slope of just 31 meters in 60 kilometers (about 3 feet per mile). With such a flat profile, the backwater effect of confluences, fallen trees, slumped banks and even algal blooms can dramatically impact flow and affect accuracy of rating curves.
