A "Billabong" is a waterhole that flows or has flowed during some part of its life, so it includes oxbow lakes,
but in Australia usually refers to those long pools of water that lie along creek or river beds during drier times.

Yellow Water Billabong is a relatively recent phenomenon and has been created by the gradual deposition of sediments since the
sea level stabilised at the end of the last ice age. Once upon a time (and probably less than 1000 years) this area would have been
a tidal mangrove swamp, but as the mangroves stopped the sediment from washing away it gradually accumulated above the
high tide line. This took a long time, as tides are up to 7 metres on the north coast of Australia. The tidal influence of salt water
is now restricted between natural levee banks which separate Kakadu's World Heritage listed freshwater wetlands from the
ravages of salt. These wetlands are threatened by introduced grasses such as Para grass and Olive Hymenachne, weeds such as
the Giant Sensitive Plant (Mimosa pigra) and feral animals such as Water Buffalo, pigs and cane toads. Rising sea levels
associated with melting glaciers and ice caps also threaten these amazing wetlands. Estaurine Crocodiles like this will be one
animal that won't be too fussed- as refugees from low lying Pacific and Indian Oceanic Islands try to get to Australia the
crocodiles will be waiting. Of course, we could just use all the money we spend trying to protect our oil interests on alternative
methods of energy production and the problem would probably be solved quite quickly. Sigh.. dreaming again.