Do you mean Lake Eyre?
https://en.wikipedia.org/wiki/Lake_Eyre
There has been discussion about flooding it with sea water for years but it seems impractical.
There has been discussion about flooding it with sea water for years but it seems impractical.
I think the big problem is motivation: we have heaps of arable land, and people are increasingly concentrated in cities.
EDIT thanks for the headsup, there's quite a bit online about it. I had this idea pre-internet, but haven't had the idea of googling it. IANA millennial, AMA (but I won't know).