There is not enough water?
There is not enough drinking water.
There is enough water on the planet - and enough energy to transform saltwater to rainwater.
This experiment was conducted at a normal Swiss summer day.
It consists of
Based on this experiment the following construction could be built.
This is a black basin with two silvery shining channels at each side.
The sun heats the black basin, supported by the reflection from the channels. The heated water vaporises and eventually drips down into the channels as if it was natural rain.
This water is gathered in a sweet water basin below. A channel leads the water to where it is needed.
Some of the water can be allowed leak out and slowly raise the ground water level.
Things to consider: