Old news – vacuum desalination again.
We use solar powered vacuum pumps to raise sea of river water up by 1m. It boils, into pure water vapour, No salts or contaminants. The group of farmers get together, to pump the vapour in shore, to a holding reservoir.
As we release the vacuum, the water condenses – heating up the air. So the high reservoir fills up with desalinated water: cattle will require a salt lick. Endless free energy – from waste solar heat.