I think the key difficulty is condensing a very large quantity of water out of an even larger quantity of air, in the desert. The thermodynamic equilibrium of w

I think the key difficulty is condensing a very large quantity of water out of an even larger quantity of air, in the desert. The thermodynamic equilibrium of water vapor vs water-in-condensed-form isn’t going to work well for you here, even after nightfall. The very reason that it was possible to evaporate the water out (i.e. the air is very dry) cuts back the other way.