[stareatgoats]

Seems to me like Australia either has catastrophic droughts or catastrophic rains. The engineer in me wants to create massive reservoirs during the wet spells to carry over the dry spells. But I guess it's not that easy?

[wffurr]

I believe those are called aquifers aka geologic water reservoirs. There's a lot that can happen, especially in urban areas with lots of hard scaped surfaces, to encourage rain water to enter aquifers instead of run off into the water shed or sewer/storm drain system.