An Australian company is going to send solar energy 1, 2 to Singapore and likely to Indonesia.

Could or shall Lake Eyre basin be flooded with desalinated seawater using the solar energy harvested at site in Central Australia?

Why this question is not posted on other SE site? Because Greening the Sahara was asked.

@Willk For the link you post, can we use the energy from the gravity drop to desalinate? For example, let the Pacific seawater go downwards into reversed osmosis membranes.

  • 3
    $\begingroup$ Of course you can fill lake Erie with desalinated seawater if you really want to. But somebody needs to pay for the power, pipelines, pumps etc. For ever, because Lake Erie will need constant replenishment. So the question is, why would the 26 million Australians commit to pay 1,000 dollars per year for each man woman and baby for ever in order to keep Lake Erie filled with fresh water? What do they hope to get in return for this massive financial effort? $\endgroup$
    – AlexP
    May 6, 2021 at 19:40
  • $\begingroup$ Here is a scheme to do it with no energy inputs at all. worldbuilding.stackexchange.com/questions/85818/… $\endgroup$
    – Willk
    May 6, 2021 at 21:16
  • $\begingroup$ You could turn the Mediterranean into a fresh water lake with enough time, money and political willpower but the question is: should you? $\endgroup$ May 7, 2021 at 3:10
  • $\begingroup$ @AlexP: Where do you get the 26 billion dollars per year figure? As for what they'd get, lakefront property and agricultural land. You wouldn't (if sensible, anyway) simply pipe the water to Lake Eyre, you'd pump it to the divide of the basin, and let it run downhill from there, creating well-watered land. That land has considerably more value: hereabouts a well-watered acre lot might sell for 100K dollars or more, vs a few thousand for nearby desert. $\endgroup$
    – jamesqf
    May 7, 2021 at 17:35
  • $\begingroup$ @jamesqf: Why would Mr. John Random Citizen pay throughout his life for other people to enjoy nice properties on the waterfront? As for the AUD 26 billion, it's an estimate extracted carefully from my stomach. (Lake Eyre, when filled, has a volume of about 30 billion cubic meters. Left on its own, the lake evaporates in less than a year. Desalinated water costs, at best, about 1 dollar per cubic meter, and that's on the sea shore.) $\endgroup$
    – AlexP
    May 7, 2021 at 18:40


Browse other questions tagged .