This produces water cheaper than reservoir water. All farmers on the coast can use this idea and get a good income stream.
Water treatment site can pump the pure water take towards the reservoir – so we can refill the reservoir – no rain required.
If we attach a solar power vacuum pump to river or sea water, raising it up just 1m causes it to boil. Losing all salts and contaminants – nothing can lived in pure water vapour.
We transfer it to the nearest water main, and the water people can put the pumps into reverse – and pump the fresh water back towards the reservoir.
The farmer has vented the pressure, so the water vapour become pure water vapour. End of droughts globally.